Home

Abaqus Release Notes

1. IV Highlight selected regions OK Cancel Figure 10 7 Stabilization assignment editor General contact includes a supplementary edge to surface contact formulation that is activated to improve contact resolution for so called feature edges In Abaqus CAE you can now specify feature edges 10 8 INTERACTIONS for Abaqus Standard interactions based on either a specific feature angle the angle between the normals of two facets connected to the edge or the perimeter edges of a shell or surface you can also request that no feature edges be activated on a particular surface These three options had been available previously for Abaqus Explicit interactions Two new options for specifying feature edges are now available for Abaqus Explicit interactions only you can activate all edges in a surface or only explicitly selected edges in a surface definition see Figure 10 8 The limitation on feature angles has also been removed for both Abaqus Standard and Abaqus Explicit interactions you can now specify any feature angle between 0 and 180 gt Edit Feature Edge Criteria Assignments x Step Initial Select Surfaces gt M Surface Feature Assignments Global Feature Edge ee PERIMETER ALL Friction_plate PICKED NONE Insertion_Face angle Friction_plate 25 Ext_corner ALL Insertion _face PICKED Ed in all steps Ay Note When assignments overlap more recent assignments override earlier ass
2. Abaqus 6 12 Release Notes 2 DS SIMULIA Abaqus Release Notes Legal Notices CAUTION This documentation is intended for qualified users who will exercise sound engineering judgment and expertise in the use of the Abaqus Software The Abaqus Software is inherently complex and the examples and procedures in this documentation are not intended to be exhaustive or to apply to any particular situation Users are cautioned to satisfy themselves as to the accuracy and results of their analyses Dassault Syst mes and its subsidiaries including Dassault Syst mes Simulia Corp shall not be responsible for the accuracy or usefulness of any analysis performed using the Abaqus Software or the procedures examples or explanations in this documentation Dassault Syst mes and its subsidiaries shall not be responsible for the consequences of any errors or omissions that may appear in this documentation The Abaqus Software is available only under license from Dassault Syst mes or its subsidiary and may be used or reproduced only in accordance with the terms of such license This documentation is subject to the terms and conditions of either the software license agreement signed by the parties or absent such an agreement the then current software license agreement to which the documentation relates This documentation and the software described in this documentation are subject to change without prior notice No part of this documentation may
3. Defining time domain viscoelasticity in Defining elasticity Section 12 9 1 in the online HTML version of this manual Abaqus Keywords Reference Manual e VISCOELASTIC 6 7 Rayleigh damping enhancement in Abaqus Explicit Products Abaqus Explicit Abaqus CAE Benefits You can now specify temperature and or field dependent Rayleigh mass proportional and stiffness proportional damping for all materials in Abaqus Explicit Mass proportional damping is now allowed for ROTARYI and MASS elements in Abaqus Explicit which was previously supported only in Abaqus Standard Description Abaqus Explicit now allows you to define Rayleigh mass proportional and stiffness proportional damping as a tabular function of temperature and or field variables In addition mass proportional damping is now allowed for ROTARYI and MASS elements in Abaqus Explicit and can be specified in Abaqus CAE This functionality was previously supported only in Abaqus Standard Abaqus CAE Usage Property module or Interaction module Special Inertia Create Point mass inertia Damping MATERIALS References Abaqus Analysis User s Manual e Material damping Section 26 1 1 e Point masses Section 30 1 1 e Rotary inertia Section 30 2 1 Abaqus CAE User s Manual e Defining point mass and rotary inertia Section 33 3 in the online HTML version of this manual Abaqus Keywords Reference Manual e DAMPING e MASS e ROTARY INERT
4. and JFLAGS i_ufld_kPass this flag is equal to for the first pass to user subroutine VUFIELD and is equal to 2 for the second pass was added VUAMP Two new variables can be passed in for information nProps user defined number of properties associated with this amplitude definition and props nprops user supplied amplitude properties VUMULLINS User subroutine to define damage variable for the Mullins effect material model 17 3 Changes in Abaqus output variable identifiers This section summarizes the changes and the additions that have been made to output variable identifiers used in Abaqus Element variables new C new C SHEARRATE Shear rate computed using the second invariant of the rate of strain tensor VISCOSITY Element molecular viscosity 17 7 SUMMARY OF CHANGES Element integration point variables new E DMICRTMAX Maximum damage initiation among all of the section points and all of the damage initiation criteria Element centroidal variables new S EMBFC Complex magnetic body force intensity in a time harmonic eddy current analysis Whole element variables new E EDMICRTMAX Whole shell element maximum damage initiation output among all of the layers all of the damage initiation criteria and for fully integrated elements across all of the integration points Element face variables new S FILMCOEF Reference film coefficient value on element faces new E IWCONWEP Air blas
5. Exporting viewport data to a 3D XML format file Section 10 9 5 in the online HTML version of this manual 3 10 Creating sets and surfaces during selection operations Product Abaqus CAE Benefits You can now create sets and surfaces of objects selected from the viewport during procedures to define attributes This enhancement improves usability Previously these sets and surfaces were only created internally and were not available for selection by set or surface name in subsequent selection operations Description Many procedures to define attributes interactions constraints loads boundary conditions predefined fields and engineering features allow you to select objects from the viewport to identify the region on which to apply the attribute An option to create a set or surface that contains the selected objects has been added in the prompt area and the option is toggled on by default You can change this behavior by toggling off the option A default name is provided in the prompt area but you can enter a new name as shown in Figure 3 7 These sets and surfaces are available for subsequent selection operations x Select surfaces for the load individually 7 M Create surface Press Joad Done surfaces Figure 3 7 New option available to create a surface 3 11 MODELING Abaqus CAE Usage Interaction module and Load module Various procedures Toggle on Create set or Create surface and specify name in the pr
6. New electromagnetic loads and boundary conditions are available in Abaqus CAE which increases the coverage of Abaqus product functionality Description In Abaqus CAE you can now define loads and boundary conditions for electromagnetic analyses see Time harmonic electromagnetic analysis in Abaqus CAE Section 4 3 Time harmonic eddy current problems are usually driven by prescribed body or surface current densities in certain regions of the model and require that you prescribe boundary conditions on surfaces Both uniform and nonuniform loads and boundary conditions can be prescribed 8 1 PRESCRIBED CONDITIONS Abaqus CAE Usage Load module Create Load Category Electrical Magnetic Types Surface current density or Body current density Create Boundary Condition Category Electrical Magnetic Types Magnetic vector potential References Abaqus Analysis User s Manual e Eddy current analysis Section 6 7 5 e Electromagnetic loads Section 33 4 5 Abaqus CAE User s Manual e Defining a surface current density Section 16 9 28 in the online HTML version of this manual e Defining a body current density Section 16 9 29 in the online HTML version of this manual e Defining a magnetic vector potential boundary condition Section 16 10 17 in the online HTML version of this manual 8 2 New category choices for loads and boundary conditions in Abaqus CAE Product Abaqus CAE Benefits The load
7. Section 3 6 1 4 6 ANALYSIS TECHNIQUES 5 Analysis techniques This chapter discusses features related to analysis techniques in Abaqus It provides an overview of the following enhancements Substructuring e Substructure generation using the AMS eigensolver Section 5 1 Matrix generation e Matrix functionality enhancements Section 5 2 Modeling discontinuities e Enhancements to the XFEM based crack propagation capability Section 5 3 Fracture mechanics e Enhancements to the Virtual Crack Closure Technique VCCT Section 5 4 Eulerian analysis e Adaptive mesh refinement for an Eulerian mesh Section 5 5 Particle methods e Smoothed particle hydrodynamics improvements Section 5 6 5 1 Substructure generation using the AMS eigensolver Products Abaqus Standard Abaqus AMS Benefits A new innovative algorithm generating a substructure using the AMS eigensolver significantly improves substructure generation performance This new algorithm also eliminates the requirement of full eigenmodes recovery for the substructure generation step therefore disk space usage in the substructure generation step can be reduced significantly if eigenmodes are recovered only at the user defined node set Description A new substructure generation capability in the AMS eigensolver delivers significant performance improvement and reduces disk space requirements for substructure generation Table 5 1 ill
8. Template model 3 Plate Bolt Available CORM U1 Fi F as F a Amplitude ainstantaneous Nu NS QI PRESCRIBED CONDITIONS Figure 8 6 Selecting a wire set from a template model to define a connector force References Abaqus CAE User s Manual e Creating loads Section 16 8 1 in the online HTML version of this manual e Creating boundary conditions Section 16 8 2 in the online HTML version of this manual CONSTRAINTS 9 Constraints This chapter discusses kinematic constraints It provides an overview of the following enhancements e Enhancements to tie constraint deletion due to element erosion Section 9 1 e Improved performance for connector elements Section 9 2 9 1 Enhancements to tie constraint deletion due to element erosion Product Abaqus Explicit Benefits An enhancement to nullify tie constraints when the underlying master elements are deleted improves the robustness of the analysis Description In Abaqus Explicit tie constraints are nullified as underlying elements of tied surfaces are deleted due to material point failure The tie constraint between a slave node and its corresponding master nodes is deleted when either all the elements attached to the slave node are deleted or the master element to which the slave node is tied is deleted References Abaqus Analysis User s Manual e Mesh tie constraints Section 34 3 1 Abaqus Keywords Reference Manual e
9. UAMP Section 1 1 19 e VUAMP Section 1 2 7 Abaqus Example Problems Manual e Crank mechanism Section 4 1 2 Abaqus Verification Manual e VUAMP Section 4 1 31 USER SUBROUTINES UTILITIES AND PLUG INS 15 2 User subroutine to define damage behavior with Mullins effect in Abaqus Explicit Product Abaqus Explicit Benefits You can now define the damage behavior associated with Mullins effect stress softening of certain filled elastomers in Abaqus Explicit This feature was previously available only in Abaqus Standard Description User subroutine VUMULLINS can be used to define the damage variable associated with Mullins effect in Abaqus Explicit This feature provides functionality equivalent to user subroutine UMULLINS in Abaqus Standard The feature complements the two other available methods for defining damage namely direct specification of damage material parameters or specification of test data The damage can be defined in terms of any number of user defined constants The subroutine also provides users with access to solution dependent state variables as well as temperature and field variables In addition to defining the damage variable the user can also define the strain energy dissipation due to damage as well as a criterion for material failure References Abaqus Analysis User s Manual e Mullins effect Section 22 6 1 e Energy dissipation in elastomeric foams Section 22 6 2 Aba
10. and native nodes and elements can now exist within a single part Previously when you worked with an orphan mesh you could use the mesh editing 12 2 MESHING tools to modify the mesh but it could be difficult to make significant changes to the model Now you can select an orphan element face as the sketch plane for the creation of new geometry Likewise some of the tools in the Edit Mesh toolset that were previously available only for use with an orphan mesh such as the Offset tool can now also be used to modify a native mesh Other tools are available to work with the new combined models but you can use them only with the suitable portions of the mesh For example the merge and subdivide layer mesh tools can be used in a combined model but you can use them only on the orphan elements Other enhancements related to this change include e Revision of the bottom up meshing tools to extend the mesh of geometry based parts by adding orphan elements e Merging part instances that include both geometry and mesh components e Allowance for the use of datum planes and element faces in addition to geometry faces on the target side of a bottom up swept mesh e Projection of nodes and element edges onto sketches e Manual association of three dimensional elements with geometric cells e Association of element faces element edges and nodes with geometry e Deletion of mesh geometry association To avoid confusion elements are still colored acco
11. of the general contact domain are also provided References Abaqus Analysis User s Manual e Defining general contact interactions in Abaqus Standard Section 35 2 1 e Surface properties for general contact in Abaqus Standard Section 35 2 2 Abaqus Keywords Reference Manual e CONTACT e CONTACT OUTPUT e SURFACE PROPERTY ASSIGNMENT 10 3 Improved robustness of small sliding surface to surface contact involving gaskets Product Abaqus Standard Benefits There will be reduced likelihood of large nonphysical distortion of gasket elements near the edges of active contact regions Description A special version of the small sliding surface to surface contact formulation is automatically invoked if the slave surface is based on gasket elements to avoid triggering unstable modes of gasket elements 10 6 INTERACTIONS in certain situations Gasket elements have very little resistance to certain shear deformation modes which are not significant in common gasket applications however having multiple slave nodes per contact constraint such as with regular surface to surface discretization can trigger these modes at boundaries of an active contact region and regions with a large contact pressure gradient Now the small sliding surface to surface contact formulation uses a single slave node per contact constraint if the slave surface is based on gasket elements like the node to surface contact formulations but it remai
12. 4 Defining the anisotropic mass tensor Products Abaqus Standard Abaqus Explicit Abaqus CAE Benefits Abaqus Standard and Abaqus Explicit now allow for point masses to be anisotropic This enhancement is useful when you are modeling submerged structures where the influence of the surrounding fluid is captured using added mass attached to the nodes of the structure This modeling approximation often results in an added mass that is direction dependent Description You can now define an anisotropic point mass element by specifying the three principal values and the principal directions In a large displacement analysis the local axes of the anisotropic mass rotate with the rotation if active of the node to which the anisotropic mass is attached The rotation degree of freedom is active at a node if that node is connected to a beam a conventional shell a rotary inertia element or a rigid body You can also specify mass proportional alpha damping and loads such as gravity for the anisotropic point mass Abaqus CAE Usage Property or Interaction module Special Inertia Create Point mass inertia select point Magnitude Anisotropic Mi Mo and M33 7 3 ELEMENTS References Abaqus Analysis User s Manual e Point masses Section 30 1 1 Abaqus CAE User s Manual e Defining point mass and rotary inertia Section 33 3 in the online HTML version of this manual Abaqus Keywords Reference Manual e MASS 7
13. File Filter Assembly Neutral eaf Reference Abaqus CAE User s Manual e What can I do with the associative interfaces Section 10 1 2 3 3 MODELING 3 3 New naming convention for imported CAD parts Product Abaqus CAE Benefits When you import a part from an external format file into a model Abaqus CAE now includes the name of the CAD system from which the part originates in the feature name of the new part This enhancement provides more precise information about your model at a glance in the Model Tree Description Imported parts in Abaqus CAE now indicate the CAD system in which the part was created as part of its feature Figure 3 3 shows the difference in naming convention between Abaqus 6 11 and Abaqus 6 12 for import of a part from a STEP format file fly Parts 1 b Parts 1 camshaft camshaft d Features 1 Features 1 Part From SAT 1 STEP Geometry 1 far Sets fad Sets M Surfaces Surfaces Skins Skins M Stringers 0 Stringers de Section Assignments de Section Assignments fhe Orientations fee Orientations 5 Composite Layups s Composite Layups y Engineering Features dip Engineering Features Aa Mesh Empty Ba Mesh Empty Figure 3 3 The previous naming convention for features in imported parts left and the naming convention in Abaqus 6 12 right Similarly parts associated with other CAD systems are created in Abaqus CAE wit
14. Nodal field output for tie constraints Section 14 7 e Maximum damage initiation output for shells Section 14 8 e Air blast pressure load output Section 14 9 e Shear rate and viscosity field output available in Abaqus CFD Section 14 10 e EXODUS II and NEMESIS output for Abaqus CFD field output Section 14 11 e Reading X Y data from history output based on the step time Section 14 12 e Filtering selections for results output Section 14 13 14 1 Requesting field output on exterior nodes and elements in Abaqus CAE Product Abaqus CAE Benefits In Abaqus CAE you can now easily request field output on the exterior nodes and elements of a model which reduces the size of the output database and is particularly useful for visualization of the overall deformation of the model Description For three dimensional models in Abaqus Standard and Abaqus Explicit analyses you can request field output on the exterior nodes and elements as shown in Figure 14 1 Abaqus CAE Usage Step module Field output request editor Domain Whole model toggle on Exterior only References Abaqus Analysis User s Manual e Output to the output database Section 4 1 3 OUTPUT AND VISUALIZATION Edit Field Output Request x Name Field output exterior Step Step 1 Procedure Static General Domain E yi Frequency Every n increments gt n fi Timing Output at exact times Figur
15. Section 31 2 3 Abaqus Keywords Reference Manual e CONNECTOR DAMPING e CONNECTOR ELASTICITY 7 3 Thick walled pipe elements in Abaqus Standard Products Abaqus Standard Abaqus CAE Benefits Abaqus Standard now supports the modeling of thick walled pipes in which the hoop and radial stress due to the applied pressure vary across the pipe cross section The thick walled element formulation better predicts the inelastic response under the effect of internal and external applied pressure for larger wall thickness to radius ratios In addition the bending and torsional behavior is modeled more accurately without recourse to thin wall assumptions Description Thick walled pipe elements can be used in all general and linear perturbation procedures in Abaqus Standard that support displacement degrees of freedom All pipe element load types are supported 7 2 ELEMENTS as well as all pipe element material models with the exception of hyperelasticity Thick walled pipes have radial stress as additional element output Abaqus CAE Usage Property module Profile Create Pipe Thick walled References Abaqus Analysis User s Manual e Choosing a beam element Section 29 3 3 e Beam cross section library Section 29 3 9 Abaqus CAE User s Manual e Defining a pipe profile in Creating profiles Section 12 13 20 in the online HTML version of this manual Abaqus Keywords Reference Manual e BEAM SECTION 7
16. TIE 9 2 Improved performance for connector elements Product Abaqus Explicit Benefits Improved performance is achieved for connector elements without kinematic constraints or constitutive behavior Description In Abaqus Explicit connector elements without kinematic constraints or constitutive behavior are now solved without invoking the implicit solver This change improves the performance of the analysis particularly when such connectors overlap with other constraints such as slave nodes of tie constraints References Abaqus Analysis User s Manual e Connector elements Section 31 1 2 9 1 CONSTRAINTS Abaqus Keywords Reference Manual e CONNECTOR SECTION INTERACTIONS 10 Interactions This chapter discusses features related to contact and interaction modeling It provides an overview of the following enhancements e Surface fluid cavities and fluid exchanges in Abaqus CAE Section 10 1 e Feature edge contact enhancements for general contact in Abaqus Standard Section 10 2 e Improved robustness of small sliding surface to surface contact involving gaskets Section 10 3 e Enhancements to general contact definitions in Abaqus CAE Section 10 4 e Surface smoothing enhancements Section 10 5 e Eulerian Lagrangian thermal contact Section 10 6 e Gap electrical conductance in Abaqus CAE Section 10 7 10 1 Surface fluid cavities and fluid exchanges in Abaqus CAE Prod
17. USER parameter can now be used with user subroutine VUMULLINS in an Abaqus Explicit analysis NONLINEAR BH Specify nonlinear magnetic behavior of a soft magnetic material PERMEABILITY This option is now available in Abaqus CFD analyses Use the new INERTIAL DRAG COEFFICIENT parameter to specify the value of the constant C in the expression for the inertial drag coefficient cr A new value is available for the TYPE parameter Set TYPE CARMAN KOZENY to define permeability as a function of porosity through the Carman Kozeny relation ROTARY INERTIA The ALPHA parameter is now supported in Abaqus Explicit to define stiffness proportional damping SECTION CONTROLS Use the new ELEMENT CONVERSION and CONVERSION CRITERION parameters to support the conversion of finite elements to SPH particles Use the new KERNEL parameter to allow for different kernel interpolators in conjunction with smoothed particle hydrodynamics SURFACE PROPERTY ASSIGNMENT The PROPERTY GEOMETRIC CORRECTION can now be used in Abaqus Explicit analyses SURFACE SMOOTHING This option now allows the specification of surface smoothing on regions of surfaces that correspond or nearly correspond to a toroidal surface TRANSPORT EQUATION SOLVER A new value is available for the TYPE parameter Set TYPE ILUFGMRES to enable the Incomplete LU factorization preconditioned Flexible Generalized Minimum Residual linear solver The numbers of restart vectors can now be
18. User s Manual e Acoustic shock and coupled acoustic structural analysis Section 6 10 1 e Dynamic analysis procedures overview Section 6 3 1 8 6 Fluid cavity pressure predefined fields and boundary conditions in Abaqus CAE Products Abaqus Standard Abaqus Explicit Abaqus CAE Benefits You can now create fluid cavity pressure fields and boundary conditions in Abaqus CAE Fluid cavity pressure predefined fields and boundary conditions are used in conjunction with fluid cavity interactions for more information see Surface fluid cavities and fluid exchanges in Abaqus CAE Section 10 1 The cavity pressure is used to specify the behavior of the cavity within an analysis and to specify flow rates in fluid exchange interactions PRESCRIBED CONDITIONS Description You can define a fluid cavity pressure predefined field in the initial step of an analysis You associate the field with a fluid cavity interaction this association applies the predefined field to the cavity reference point You can create a fluid pressure boundary condition in most analysis steps and modify it in any step after you create it As with the fluid cavity predefined field you associate the boundary condition with a fluid cavity interaction this association applies the boundary condition to the cavity reference point You can edit the pressure and select an amplitude to define how the change in pressure is applied from one analysis step to another Som
19. angle Enter a maximum angle and pick a starting element face Abaqus CAE measures the angle from the selected face to each adjacent face Selection continues outward from the picked face until the measured angle with the original face is exceeded e Layer Specify anumber of layers and pick a starting element face Abaqus CAE selects element faces radiating out from one that you selected up to the number of layers Selection continues until the number of layers is reached or there are no more orphan element faces in a particular direction e Analytic Pick a starting element face and Abaqus CAE adds all faces that it determines to be part of the same analytic shape Analytic shapes include planes cylinders cones spheres and tori As you add faces Abaqus CAE stitches new faces to any existing geometry to produce a shell part Figure 3 6 shows an orphan mesh part and the same part with most faces converted into geometry When you are finished creating new faces you can use the other tools in the Geometry Edit toolset to repair the geometry if needed Each face is created as a separate feature and you cannot edit the faces that you create from element faces However you can add new geometry features create a solid from the shell part suppress or delete the orphan mesh and create a new mesh for the part MODELING Figure 3 6 Converting orphan element faces to geometric faces A related enhancement in this release allows you to use o
20. be reproduced or distributed in any form without prior written permission of Dassault Syst mes or its subsidiary The Abaqus Software is a product of Dassault Syst mes Simulia Corp Providence RI USA Dassault Syst mes 2012 Abaqus the 3DS logo SIMULIA CATIA and Unified FEA are trademarks or registered trademarks of Dassault Syst mes or its subsidiaries in the United States and or other countries Other company product and service names may be trademarks or service marks of their respective owners For additional information concerning trademarks copyrights and licenses see the Legal Notices in the Abaqus 6 12 Installation and Licensing Guide SIMULIA Worldwide Headquarters SIMULIA European Headquarters United States Australia Austria Benelux Canada China Finland France Germany India Italy Japan Korea Latin America Scandinavia United Kingdom Argentina Brazil Czech amp Slovak Republics Greece Israel Malaysia Mexico New Zealand Poland Russia Belarus amp Ukraine Singapore South Africa Spain amp Portugal Locations Rising Sun Mills 166 Valley Street Providence RI 02909 2499 Tel 1 401 276 4400 Fax 1 401 276 4408 simulia support 3ds com http www simulia com Stationsplein 8 K 6221 BT Maastricht The Netherlands Tel 31 43 7999 084 Fax 31 43 7999 306 simulia europe info 3ds com Dassault Syst mes Centers of Simulation Excellence Fremont CA Tel 1 5
21. body cut For example if you specified the free body cross section by selecting a group of surface sets the default selection item will be Surfaces and the default selection method will be Surface sets e You can change the settings for the summation point of the resultant force and moment vectors and change the component resolution options when vectors are displayed in component form These options specified in the Edit Free Body Cut dialog box are also customized so that their default values match the most recently selected options for this free body cut Abaqus CAE Usage Visualization module Tools Free Body Edit free body name 14 4 OUTPUT AND VISUALIZATION Reference Abaqus CAE User s Manual e Creating or editing a free body cut Section 67 2 in the online HTML version of this manual 14 5 Selecting elements by topology in the Visualization module Product Abaqus CAE Benefits You can now easily select element rows or layers in the Visualization module Description The topology selection method is now available in the Visualization module for most element selection procedures When you are performing a task that allows you to pick multiple elements the list of selection methods in the prompt area includes by topology You can select multiple elements based on the connection of a row or layer of elements You can select entire rows or layers of elements with a single click Abaqus CAE Usage Visualization m
22. derive material behaviors for hyperelasticity plasticity and Mullins effect from uniaxial and biaxial test data When you select the data sets from which you want to derive these material behaviors Abaqus CAE extracts each loading unloading and reloading component of the data as well as the permanent set data and creates new calibration data sets for each cycle This process enables you to use a subset of these test data for the derivation of material behaviors Figure 6 1 shows the extracted data sets in the Edit Behavior dialog box with the first and fifth unloading and reloading cycles toggled off Data from these deselected cycles will not be included in the calculations of material behaviors and they are also excluded from the X Y curves displayed in the viewport as shown in Figure 6 2 6 1 MATERIALS Edit Behavior x Name Hyperelasticity_behavior Type Hyperelasticity with Permanent Set Uniaxial Biaxial Options Data set Biaxial v M Biaxial Test Data Sets T all IV Primary v VW Unloading J BiaxialbUnload 1 I BiaxialbUnload 2 IV BiaxialbUnload 3 I BiaxialbUnload 4 I BiaxialbUnload 5 v V Reloading J BiaxialbReload 1 IV BiaxialbReload 2 IV BiaxialbReload 3 IV BiaxialbReload gt I Permanent Set M Primary Curve Yield point fo 02418 0 4922 N P gt Material Material 1 7 7 E OK Apply Cancel Figure 6 1 The Edit Behavior dialog b
23. edge to surface formulation has been extended to shells and is active by default for general contact Description Various robustness performance and functionality enhancements have been made for the supplementary edge to surface formulation of general contact in Abaqus Standard Now the edge to surface formulation considers perimeter edges and most significant geometric feature edges of three dimensional bodies modeled with solid and shell elements by default Previously no features edges were considered by default and applicability of the edge to surface formulation was limited to edges of solid elements General contact uses the edge to surface formulation in addition to the surface to surface formulation The edge to surface formulation more accurately resolves certain contact scenarios involving feature edges than the node to surface formulation Figure 10 3 and Figure 10 4 show an example involving contact with perimeter edges of a shell frame Figure 10 3 Soft cloth falling on a shell frame initial configuration New output variables CSTRESSETOS and CDISPETOS are provided which are useful to determine effects of the edge to surface formulation on preexisting general purpose output variables CSTRESS and CDISP For example CSTRESS reflects the sum of a contribution from the edge to surface formulation corresponding to CSTRESSETOS and a contribution from the surface to surface formulation For cases in which CSTRESS is reported in uni
24. field output in Abaqus Explicit to more easily identify unconstrained slave nodes and visualize the adjustments performed at the slave nodes in your analysis Description The following nodal output variables are now available as field output e TIEDSTATUS output at nodes will help you identify the slave nodes involved in a tie constraint that were tied successfully and the slave nodes that were not tied left unconstrained This output has a value of 2 if the slave node is not tied 1 if the slave node is tied and 0 for nodes that do not participate in a tie constraint 14 6 OUTPUT AND VISUALIZATION e TIEADJUST vector output at slave nodes will help you visualize the adjustment performed at the slave nodes involved in a tie constraint where all tied nodes on the slave surface are moved onto the master surface in the initial configuration without any strain Abaqus CAE Usage Step module Field output request editor Output Variables State Field User Time TIEDSTATUS and TIEADJUST References Abaqus Analysis User s Manual e Abaqus Explicit output variable identifiers Section 4 2 2 e Mesh tie constraints Section 34 3 1 Abaqus CAE User s Manual e Creating and modifying output requests Section 14 4 5 14 8 Maximum damage initiation output for shells Products Abaqus Explicit Abaqus CAE Benefits New damage initiation output is now available in Abaqus Explicit to improve capturing the results of your an
25. has been added to the material editor menus Electrical properties that were previously available from the Other Electrical menu have been moved to the Electrical Magnetic menu and the Magnetic Permeability behavior has been added as shown in Figure 6 3 Abaqus CAE Usage Property module Material editor Electrical Magnetic Reference Abaqus CAE User s Manual e Defining electrical and magnetic material models Section 12 11 in the online HTML version of this manual MATERIALS gt Edit Material 3 x Name Electromagnetic Description M Material Behaviors Magnetic Permeability General Mechanical Thermal Electrical Magnetic Other z T Electrical Conductivity Magnetic Permeability Dielectric Electrical Permittivity Type isotropic x Piezoelectric I Use frequency dependent data kemiske ay I Use temperature dependent data Number of field variables os gt Data Magnetic Permeabilit 1 1 25663706144e 06 Cancel Figure 6 3 Material behaviors available from the Electrical Magnetic menu 6 4 Non Newtonian viscosity in Abaqus CFD Product Abaqus CFD Benefits Many fluids of industrial technological and biological significance such as foams emulsions dispersions and suspensions slurries blood and polymeric melts are non Newtonian in nature Simulation of flows involving such fluids can be achieved using the non Newtonian model
26. interactively Section 2 3 Persistence for session objects and options Section 2 4 Boolean operations on sets and surfaces Section 2 5 Consistency of objects during instance merging operations Section 2 6 Controlling part instance display from the Model Tree or from the viewport Section 2 7 Inverting component display and undoing display group changes from the Display Group toolbar Section 2 8 Clearer organization for view cut color selection options Section 3 1 Modeling enhancements for electromagnetic analyses Section 3 2 SIMULIA Associative Interface for Abaqus CAE Section 3 3 New naming convention for imported CAD parts Section 3 4 Retaining intersecting boundaries during part import from ACIS Section 3 5 Constraints in the Sketcher Section 3 6 Projecting mesh edges or nodes onto a sketch Section 3 7 Viewing model database attributes in the Visualization module Section 3 8 Creating geometry from orphan elements Section 3 9 Exporting contour plot data to 3D XML Section 3 10 Section 3 11 Section 4 1 Section 4 2 Section 4 3 Section 4 4 Section 5 6 Section 6 1 Section 6 2 Section 6 3 Section 6 5 Section 6 6 Section 6 7 Section 7 1 Section 7 3 Section 7 4 Creating sets and surfaces during selection operations Enhancements to mapped analytical fields in Abaqus CAE Implicit advection in Abaqus CFD Porous media flows in Abaqus CFD Time harmonic electromagnetic analysis in Abaqus CAE Coupled thermal electrical structu
27. loads contact interactions initial conditions mass scaling and output requests associated with the parent elements or nodes of the parent elements will be transferred appropriately to the generated particles upon conversion By default the smoothed particle hydrodynamic method implemented in Abaqus Explicit uses a cubic spline as the interpolation polynomial quadratic and quintic interpolators are also available The implementation is based on the classical smoothed particle hydrodynamic theory In addition you have the option of using a mean flow correction configuration update commonly referred to in the literature as the XSPH method as well as a corrected first order consistent kernel referred to as the normalized SPH NSPH method Abaqus CAE Usage Mesh module Mesh Element Type Conversion to particles Yes References Abaqus Analysis User s Manual e Smoothed particle hydrodynamic analysis Section 15 1 1 e Finite element conversion to SPH particles Section 15 1 2 e Section controls Section 27 1 4 Abaqus CAE User s Manual e Element type assignment Section 17 5 3 Abaqus Keywords Reference Manual e DEPVAR e SECTION CONTROLS Abaqus Example Problems Manual e Impact of a water filled bottle Section 2 3 2 Abaqus Verification Manual e Smoothed particle hydrodynamic analysis Section 3 20 1 ANALYSIS TECHNIQUES MATERIALS 6 Materials This chapter discusses new ma
28. module Create Boundary Condition Step step Category Mechanical Types for Selected Step Displacement base motion or Velocity base motion or Acceleration base motion Create Boundary Condition Step step Category Mechanical Types for Selected Step Secondary base Step module Interaction module or Load module Tools Amplitude Create Type PSD Definition References Abaqus Analysis User s Manual e Natural frequency extraction Section 6 3 5 e Transient modal dynamic analysis Section 6 3 7 PRESCRIBED CONDITIONS e Mode based steady state dynamic analysis Section 6 3 8 e Subspace based steady state dynamic analysis Section 6 3 9 e Random response analysis Section 6 3 11 e Prescribing boundary conditions in linear perturbation steps in Boundary conditions in Abaqus Standard and Abaqus Explicit Section 33 3 1 Abaqus CAE User s Manual e Defining a base motion boundary condition Section 16 10 8 in the online HTML version of this manual e Defining a secondary base motion boundary condition Section 16 10 9 in the online HTML version of this manual e Defining a PSD definition Section 57 13 in the online HTML version of this manual 8 12 Total flux distribution option for surface heat flux in Abaqus CAE Product Abaqus CAE Benefits When defining surface heat flux you can choose the new total flux option for the load distribution This allows you
29. on the volume averaged Darcy Brinkman Forchheimer equations that account for both Darcian and inertial non Darcian effects The following assumptions are made in deriving the governing equations e The porosity of the medium does not vary with time or the time scale of variation of the porosity is considered to be much larger than the dominant time scales of the fluid motion e The permeability of the porous medium is isotropic and dependent only on the porosity of the medium The widely used Carman Kozeny permeability porosity relationship is included in the enhancement The porous drag forces namely the Darcy and Forchheimer drag forces are activated for a prescribed element set by specifying them as distributed loads For more information see New porous drag body force load in Abaqus CFD Section 8 8 For porous flows with heat transfer the volume averaged temperature transport equation is considered with the assumption of local thermal equilibrium You define a fluid section for heat transfer analysis involving porous media Abaqus CAE Usage Property module Material editor Other Pore Fluid Permeability Type Isotropic CFD or Carman Kozeny Section Create Category Fluid Type Porous References Abaqus Analysis User s Manual e Porous media flows in Incompressible fluid dynamic analysis Section 6 6 2 e Permeability Section 26 6 2 e Fluid element library Section 28 2 2 4 2 ANALYS
30. select an existing cavity or two in the case of exchange between cavities and then select the interaction property that drives the fluid exchange You must also include an effective exchange area this represents the area through which the fluid flows during the exchange Figure 10 2 shows the Edit Interaction dialog box for a fluid exchange between a cavity and the environment The fluid exchange interaction property can be defined with one of the following methods INTERACTIONS gt Edit Interaction Property 4 Edit Interaction Property xj Name IntProp 6 Name IntProp 6 Type Fluid cavity Type Fluid cavity Definition Hydraulic Pneumatic Definition Hydraulic Pneumatic Fluid density Ideal gas molecular weight poo Fluid Bulk Modulus Fluid Expansion pone Coreen Specify J Specify Fluid bulk modulus required for Explicit girar e Polynomial Tabular F Use temperature dependent data ya M Polynomial Coefficients Number of field variables a feer i S First Fluid Bulk Modulus Second Third Fourth Fifth OK Cancel Figure 10 1 Creating fluid cavity interaction properties e Bulk viscosity e Mass flux e Mass rate leakage e Volume flux e Volume rate leakage Fluid cavity and fluid exchange interactions must be defined in the initial step of an analysis They are active for all steps and you cannot change them in subsequ
31. specified on the data line 17 5 SUMMARY OF CHANGES mod S E VISCOELASTIC This option now allows the specification of viscoelastic properties for cohesive elements with elastic traction separation behavior in Abaqus Explicit analyses Use the new NONLINEAR LAW NETWORKID SRATIO and DEPENDENCIES parameters in an Abaqus Standard analysis to define a nonlinear viscoelastic model with multiple parallel networks mod C VISCOSITY This option is now available in the following shear rate dependendent non Newtonian models Carreau Yasuda Cross Ellis Meter Herschel Bulkley Powell Eyring and power law mod S VISCOUS Use the new TIME parameter to specify whether creep time or total time is used in the time hardening relation 17 2 Changes in Abaqus user subroutines This section summarizes the changes and the additions that have been made to user subroutines that can be used in an Abaqus model mod S CREEP The new variable TIME 3 value of creep time at the end of the increment is passed in for information mod S FRIC_COEF Two variables that are passed in for information have been renamed the average current temperature between the master and slave surfaces at the contact point has been renamed tempAvg nBlock and the average current value of all the user specified field variables between the master and slave surfaces at the contact point has been renamed ieldAvg nBlock nFields new C SMACfdUserPr
32. to control the display of assemblies with a large number of part instances Description Abaqus CAE now enables you to display or hide part instances by using the menus that appear when you highlight part instances in the Model Tree and click mouse button 3 or when you click mouse button 3 in the current viewport Figure 2 4 shows the new Hide and Hide Instance functionality that appears in these two menus Switch Context Ctrl Space Rename Suppress Resume Delete Query Part 5 Show Parents M Postio Show Children by eee Make Dependent ets Make Independent Ay Surfac p B Link Instances Conne f Engi Exclude From Simulation Engine 2 oba Steps 4 Switch to part context Figure 2 4 New options for hiding part instances from the Model Tree left and from the current viewport right Hiding part instances from the viewport is available for all modules in Abaqus CAE As in earlier Abaqus releases you can hide individual instances by using the Instances tabbed page of the Assembly Display Options dialog box Abaqus CAE Usage All modules Model Tree highlight part instances click mouse button 3 Hide or Show Click mouse button 3 in the current viewport Hide Instance GENERAL ENHANCEMENTS Reference Abaqus CAE User s Manual e Controlling instance visibility Section 76 14 2 7 inverting component display and u
33. under the low frequency assumption and hence accounts for strong coupling between the electric and the magnetic 4 5 ANALYSIS PROCEDURES fields Transient eddy current analysis is available with two dimensional planar and three dimensional continuum elements and is based on an element edge based interpolation of fields instead of the usual node based interpolation The transient eddy current analysis can be driven by prescribed volume and or surface current density vectors or by prescribed values of the magnetic vector potential on surfaces The magnetic behavior of the medium can be linear or nonlinear and must be defined everywhere in the domain Nonlinear magnetic behavior can be defined in terms of one or more B H curves Electrical conductivity must be defined in the conductor regions References Abaqus Analysis User s Manual Electromagnetic analysis procedures Section 6 7 1 Eddy current analysis Section 6 7 5 Magnetic permeability Section 26 5 3 Two dimensional solid element library Section 28 1 3 Three dimensional solid element library Section 28 1 4 Abaqus Keywords Reference Manual D EM POTENTIAL DECURRENT DSECURRENT ELECTROMAGNETIC MAGNETIC PERMEABILITY NONLINEAR BH Abaqus User Subroutines Reference Manual UDECURRENT Section 1 1 23 UDEMPOTENTIAL Section 1 1 24 UDSECURRENT Section 1 1 26 Abaqus Verification Manual Eddy current analysis
34. 10 794 5891 simulia west support 3ds com West Lafayette IN Tel 1 765 497 1373 simulia central support 3ds com Northville MI Tel 1 248 349 4669 simulia greatlakes info 3ds com Woodbury MN Tel 1 612 424 9044 simulia central support 3ds com Mayfield Heights OH Tel 1 216 378 1070 simulia erie info 3ds com Mason OH Tel 1 513 275 1430 simulia central support 3ds com Warwick RI Tel 1 401 739 3637 simulia east support 3ds com Lewisville TX Tel 1 972 221 6500 simulia south info 3ds com Richmond VIC Tel 61 3 9421 2900 simulia au support 3ds com Vienna Tel 43 1 22 707 200 simulia at info 3ds com Maarssen The Netherlands Tel 31 346 585 710 simulia benelux support 3ds com Toronto ON Tel 1 416 402 2219 simulia greatlakes info 3ds com Beijing P R China Tel 8610 6536 2288 simulia cn support 3ds com Shanghai P R China Tel 8621 3856 8000 simulia cn support 3ds com Espoo Tel 358 40 902 2973 simulia nordic info 3ds com Velizy Villacoublay Cedex Tel 33 1 61 62 72 72 simulia fr support 3ds com Aachen Tel 49 241 474 01 0 simulia de info 3ds com Munich Tel 49 89 543 48 77 0 simulia de info 3ds com Chennai Tamil Nadu Tel 91 44 43443000 simulia in info 3ds com Lainate MI Tel 39 02 3343061 simulia ity info 3ds com Tokyo Tel 81 3 5442 6302 simulia jp support 3ds com Osaka Tel 81 6 7730 2703 simulia jp support 3ds com Mapo Gu Seoul Tel 82 2 785 6707 8 simulia kr in
35. 10 or more Description Explicit treatment of advection terms requires that the CFL stability condition be respected i e CFL lt 1 2 Implicit advection admits a larger CFL condition CFL gt 1 2 Abaqus CAE Usage Step module Step Create General Flow Incrementation tabbed page Advection time integration parameters References Abaqus Analysis User s Manual e Time incrementation in Incompressible fluid dynamic analysis Section 6 6 2 Abaqus CAE User s Manual e Configuring a flow procedure in Configuring general analysis procedures Section 14 11 1 in the online HTML version of this manual ANALYSIS PROCEDURES Abaqus Keywords Reference Manual e CFD 4 2 Porous media flows in Abaqus CFD Products Abaqus CFD Abaqus CAE Benefits Flows through fluid saturated porous media occur in a wide range of industrial and environmental applications Examples include packed bed heat exchangers heat pipes thermal insulation petroleum reservoirs nuclear waste repositories geothermal engineering thermal management of electronic devices metal alloy casting and flow past porous scaffolds in bioreactors The new enhancement is very useful for simulating such flows Flows with or without heat transfer are supported both in pure porous medium and conjugate domains containing both porous and pure fluid regions Description For isothermal flows in porous media the model implemented in Abaqus CFD is based
36. 4 PRESCRIBED CONDITIONS 8 Prescribed conditions This chapter discusses loads boundary conditions and predefined fields It provides an overview of the following enhancements e Prescribing loads and boundary conditions in an electromagnetic analysis in Abaqus CAE Section 8 1 e New category choices for loads and boundary conditions in Abaqus CAE Section 8 2 e Changing the coordinate system for fluid velocity boundary conditions in Abaqus CAE Section 8 3 e Enhancements to distributed body heat flux Section 8 4 e Impedance conditions in modal steady state dynamic analysis Section 8 5 e Fluid cavity pressure predefined fields and boundary conditions in Abaqus CAE Section 8 6 e New rotordynamic load Section 8 7 e New porous drag body force load in Abaqus CFD Section 8 8 e New passive outflow boundary type in Abaqus CFD Section 8 9 e Pressure boundary condition that varies with the total volume of fluid crossing a surface in Abaqus CFD Section 8 10 e Base motion boundary conditions and PSD amplitudes in Abaqus CAE Section 8 11 e Total flux distribution option for surface heat flux in Abaqus CAE Section 8 12 e Defining connector loads and boundary conditions using assembled fasteners and template models Section 8 13 8 1 Prescribing loads and boundary conditions in an electromagnetic analysis in Abaqus CAE Products Abaqus Standard Abaqus CAE Benefits
37. 6 2 Enhancements to general contact definitions in Abaqus CAE Surface smoothing enhancements Eulerian Lagrangian thermal contact Translating LS DYNA input files to partial Abaqus input files Nodal field output for tie constraints Maximum damage initiation output for shells Air blast pressure load output Enhancements to user subroutines UAMP and VUAMP User subroutine to define damage behavior with Mullins effect in Abaqus Explicit Expanded object coverage for definition of custom kernel data Descriptive header in the journal file Abaqus CFD Section 4 1 Implicit advection in Abaqus CFD Section 4 2 Porous media flows in Abaqus CFD Section 6 4 Non Newtonian viscosity in Abaqus CFD Section 8 3 Section 8 4 Section 8 8 Section 8 9 Changing the coordinate system for fluid velocity boundary conditions in Abaqus CAE Enhancements to distributed body heat flux New porous drag body force load in Abaqus CFD New passive outflow boundary type in Abaqus CFD Section 8 10 Section 11 1 Section 14 10 Section 14 11 Section 15 3 PRODUCT INDEX Pressure boundary condition that varies with the total volume of fluid crossing a surface in Abaqus CFD Defining a seam in an Abaqus CFD analysis Shear rate and viscosity field output available in Abaqus CFD EXODUS II and NEMESIS output for Abaqus CFD field output User subroutines for pressure and velocity boundary conditions in Abaqus CFD Abaqus CAE Section 2 2 Queuing sessions running
38. AE Usage Step module Step Create General Coupled thermal electric structural References Abaqus Analysis User s Manual e Fully coupled thermal electrical structural analysis Section 6 7 4 Abaqus CAE User s Manual e Configuring a fully coupled simultaneous heat transfer electrical and structural procedure in Configuring general analysis procedures Section 14 11 1 in the online HTML version of this manual 4 5 Magnetostatic analysis in Abaqus Standard Product Abaqus Standard Benefits You can now perform a magnetostatic analysis that computes the magnetic field due to a known distribution of direct current Description The magnetostatic approximation to Maxwell s equations describing electromagnetic phenomena is solved to compute the magnetic field due to a known distribution of direct current The magnetic field is completely decoupled from the electric field as a result the electric field does not enter the magnetostatic formulation Magnetostatic analysis is available with two dimensional planar and three dimensional continuum elements and is based on an element edge based interpolation of fields instead of the usual node based interpolation The magnetostatic analysis can be driven by prescribed volume and or surface current density vectors or by prescribed values of the magnetic vector potential on surfaces The 4 4 ANALYSIS PROCEDURES magnetic behavior of the medium can be linear or non
39. CAE automatically reflects those changes in the Visualization module When you select a model and one of its analysis steps you can plot contours or symbols for a selected load predefined field or interaction in that step by selecting that item as the current field output variable The Field Output dialog box and the Field Output toolbar show the loads predefined fields and interactions that are included in the selected step with the items in each category labeled with an L a P or an I respectively Figure 3 5 shows a model in which a predefined field is shown with a contour plot P Predefined Field 1 4 605e 00 4 594e 00 4 583e 00 4 572e 00 4 561e 00 4 550e 00 4 539e 00 4 528e 00 4 517e 00 4 506e 00 4 495e 00 4 484e 00 4 473e 00 Figure 3 5 Predefined field displayed as contours in the Visualization module Only a subset of the loads predefined fields and interactions that you can define in Abaqus CAE are eligible for display in the Visualization module refer to Overview of results selection from the current model database Section 42 2 in the Abaqus CAE User s Manual for the full list You can display attributes only when their propagation status is Created in this step Propagated from a previous step or Modified in this step When an attribute is defined using an analytical field as a custom distribution or using a user selected coordinate system this aspect of
40. IA Abaqus Verification Manual e Material damping in Abaqus Explicit Section 2 2 31 e Mass proportional damping in Abaqus Explicit Section 2 2 32 6 8 Parallel network viscoelastic model Product Abaqus Standard Benefits You can define nonlinear viscoelastic behavior with hyperelasticity using the new parallel network viscoelastic model Description The parallel network viscoelastic model allows realistic simulation of viscous materials that may undergo large deformations such as polymers The model consists of multiple elastic and viscoelastic networks as depicted in Figure 6 4 In the model one of the networks is purely elastic and the remaining networks are viscoelastic The elastic response is specified using one of the hyperelastic material models and the viscous response is governed by a flow rule derived from the Mises stress potential and the strain hardening or the hyperbolic sine evolution laws References Abaqus Analysis User s Manual e Parallel network viscoelastic model Section 22 8 2 Abaqus Keywords Reference Manual e VISCOELASTIC MATERIALS Figure 6 4 Nonlinear viscoelastic model with multiple parallel networks Abaqus Verification Manual e Nonlinear large strain viscoelasticity with hyperelasticity Section 2 2 8 6 9 Ductile damage initiation criterion enhancements in Abaqus Explicit Product Abaqus Explicit Benefits You can now define the ductile damage initiati
41. IS PROCEDURES Abaqus CAE User s Manual e Defining isotropic permeability in an Abaqus CFD analysis in Defining a fluid filled porous material Section 12 12 3 in the online HTML version of this manual e Defining permeability based on the Carman Kozeny relation in Defining a fluid filled porous material Section 12 12 3 in the online HTML version of this manual e Creating fluid sections for porous media Section 12 13 14 in the online HTML version of this manual Abaqus Keywords Reference Manual e DLOAD e FLUID SECTION e PERMEABILITY 4 3 Time harmonic electromagnetic analysis in Abaqus CAE Products Abaqus Standard Abaqus CAE Benefits You can now perform a time harmonic electromagnetic analysis that accounts for full coupling between electric and magnetic fields in Abaqus CAE which increases the coverage of Abaqus product functionality Description Abaqus CAE now supports Abaqus Standard time harmonic electromagnetic eddy current analyses to calculate the eddy currents that are induced in a conductor placed within a time harmonic magnetic field You specify one or more excitation frequencies one or more frequency ranges or a combination of excitation frequencies and ranges to obtain the time harmonic solution directly at a given excitation frequency Abaqus CAE Usage Step module Step Create Linear perturbation Electromagnetic Time harmonic References Abaqus Analysis User s Manua
42. The XFEM method is extended to support first order axisymmetric elements Up to 100 enrichment definitions can be specified in a model The frictional stresses can be included in the cracked element surfaces of an enriched element Parallel execution of the element operations is available through thread based parallelization for analyses with XFEM References Abaqus Analysis User s Manual e Modeling discontinuities as an enriched feature using the extended finite element method Section 10 7 1 Abaqus Keywords Reference Manual e BOUNDARY e ENRICHMENT 5 4 Enhancements to the Virtual Crack Closure Technique VCCT Product Abaqus Standard Benefits The original Virtual Crack Closure Technique VCCT has been enhanced to allow the release of multiple nodes in one increment and to allow the specification of different critical energies for the onset and growth of a crack This is very useful to effectively predict the delamination of composite structures and to extend the VCCT capability to account for some ductile fracture resistance ANALYSIS TECHNIQUES Description When the VCCT technique is used crack propagation analysis is carried out on a nodal basis The crack tip node debonds when the fracture criterion is reached within a given tolerance The time increment will be cutback if the tolerance is exceeded For an unstable crack growth problem however it is more efficient to allow multiple nodes at and ahead of a crack tip t
43. a smooth curve using data from Step 2 and Step 5 in a 7 step analysis Abaqus CAE Usage Visualization module Result History Output Steps Frames tabbed page toggle on Use Step Time 14 9 OUTPUT AND VISUALIZATION Reference Abaqus CAE User s Manual e Reading X Y data from output database history output Section 47 2 1 14 13 Filtering selections for results output Product Abaqus CAE Benefits New filters for results output improve handling of results data for postprocessing complex parts particularly composite parts Description You can now filter ply selections by name when you select section point data by ply for integration point results and material orientations to simplify ply selection in models containing very large ply stacks A new name filter has also been added for selecting a user specified coordinate system defined either during model generation or during postprocessing for a transformation Abaqus CAE Usage Visualization module Result Section Points Selection method Plies Name filter Result Options Transformation tabbed page Transform Type User specified Name filter References Abaqus CAE User s Manual e Selecting section point data Section 42 5 9 in the online HTML version of this manual e Transforming results into a new coordinate system Section 42 6 8 in the online HTML version of this manual 14 10 USER SUBROUTINES UTILITIES AND PLUG INS 15 User su
44. ad types available in the Electrical Magnetic category for a time harmonic electromagnetic analysis Reference Abaqus CAE User s Manual e Creating and modifying prescribed conditions Section 16 4 8 3 Changing the coordinate system for fluid velocity boundary conditions in Abaqus CAE Products Abaqus CFD Abaqus CAE Benefits You can now change the coordinate system in which you specify a fluid velocity boundary condition in Abaqus CAE This enhancement provides a finer level of control when defining these types of boundary conditions Description By default the global coordinate system is used when defining any boundary condition For a fluid inlet and outlet velocity boundary condition and a fluid wall velocity boundary condition you 5 PRESCRIBED CONDITIONS Create Boundary Condition x Name Elec _pot_be Step step 1 M Procedure Static General M Category Types for Selected Step Mechanical Fluid Electrical Magnetic Other a Figure 8 2 Boundary condition type available in the Electrical Magnetic category for a static general procedure can now select another coordinate system in which to specify the boundary condition only a rectangular coordinate system can be selected To avoid precision loss due to finite precision arithmetic values for all three components must be specified when applying fluid velocity boundary conditions in a coordinate system o
45. additions and modifications Product Abaqus CAE Benefits Abaqus CAE now retains the mesh for a model through most feature editing operations Description You can now edit a model without deleting the entire mesh In previous releases Abaqus CAE deleted any existing mesh when you made a change to model features Abaqus CAE now retains the mesh where possible and attempts to attach it to the modified model when you modify or add features The mesh is deleted locally only in the vicinity of detected changes to the geometry Mesh retention also extends to the creation of a bottom up mesh You can assign the bottom up meshing technique to a cell that contains a top down mesh and the existing mesh and associativity are retained allowing you to add a bottom up mesh without starting over For smaller enhancements such as changing the diameter of a hole or other minor dimensional changes retaining the mesh can save a great deal of time over creating a new mesh For model changes that more significantly impact the mesh you may want to delete the mesh so that Abaqus CAE does not unnecessarily expend resources attempting to reuse the existing mesh Abaqus CAE Usage Part module Feature Edit Shape Solid Shell etc Mesh module Mesh Controls Technique Bottom up 12 9 MESHING References Abaqus CAE User s Manual e Adding a feature to a part Section 11 20 in the online HTML version of this manual e Using the Edit Feat
46. ain based on the criteria you sepecify You can select from a variety of refinement criteria to suit your particular application When applied to a shock propagation problem this new feature can automatically refine the elements around the moving shock front the elements are also automatically coarsened once the shock front passes This feature is also very useful in problems where higher mesh resolution is needed to more accurately capture the location of a material interface contact surface References Abaqus Analysis User s Manual e Defining adaptive mesh refinement in the Eulerian domain Section 14 1 4 ANALYSIS TECHNIQUES Abaqus Keywords Reference Manual e ADAPTIVE MESH REFINEMENT 5 6 Smoothed particle hydrodynamics improvements Products Abaqus Explicit Abaqus CAE Benefits You can now leverage the intrinsic strengths of Lagrangian finite elements and smoothed particle hydrodynamic SPH methods when modeling a body You can use finite elements to create the model and allow these elements to convert to SPH particles during the analysis Description For an analysis involving the conversion of continuum elements to SPH particles you start by defining a part as usual You mesh the part with C3D8R C3D6 or C3D4 reduced integration elements or a combination of these elements You then specify that these parent elements are to convert to internally generated SPH particles when a user specified criterion is met Gravity
47. alue of porosity is specified as the load Abaqus CAE Usage Load module Create Load Category Fluid Types Porous drag body force References Abaqus Analysis User s Manual e Porous media flows in Incompressible fluid dynamic analysis Section 6 6 2 PRESCRIBED CONDITIONS e Permeability Section 26 6 2 e Fluid element library Section 28 2 2 Abaqus CAE User s Manual e Defining a porous drag body force Section 16 9 24 in the online HTML version of this manual Abaqus Keywords Reference Manual e DLOAD e FLUID SECTION e PERMEABILITY 8 9 New passive outflow boundary type in Abaqus CFD Product Abaqus CFD Benefits A new boundary condition for passive outflow can now be defined in an Abaqus CFD analysis Description The passive outflow boundary condition can be used to improve the analysis stability when reverse flow occurs at the outlet References Abaqus Analysis User s Manual e Boundary conditions in Abaqus CFD Section 33 3 2 Abaqus Keywords Reference Manual e FLUID BOUNDARY 8 10 Pressure boundary condition that varies with the total volume of fluid crossing a surface in Abaqus CFD Product Abaqus CFD Benefits A new boundary condition for fluid pressure that varies with the total volume of fluid crossing a surface can now be defined in an Abaqus CFD analysis Description This capability can be used to define pressure boundary conditions that vary with the t
48. alysis Description The following damage initiation field element output variables are now available e DMICRTMAX element output generates three element output quantities DMICRTMAXVAL maximum damage initiation value DMICRTTYPE damage initiation type for which the maximum damage initiation was reached DMICRTPOS section point number in the beam or shell section for which the maximum damage initiation was reached for solid elements this value is one e EDMICRTMAX whole shell element output generates four output quantities EDMICRTMAXVAL maximum damage initiation value EDMICRTLAYER damage initiation layer for which the maximum damage initiation value occurred EDMICRTTYPE damage initiation type for which the maximum damage initiation was reached EDMICRTINTP integration point number for which the maximum damage initiation was reached for reduced integration elements this value is one Abaqus CAE Usage Step module Field output request editor Output Variables Failure Fracture DMICRTMAX and EDMICRTMAX 14 7 OUTPUT AND VISUALIZATION References Abaqus Analysis User s Manual e Abaqus Explicit output variable identifiers Section 4 2 2 Abaqus CAE User s Manual e Creating and modifying output requests Section 14 4 5 14 9 Air blast pressure load output Products Abaqus Explicit Abaqus CAE Benefits The incident wave pressure field output for shock waves using the CONWEP model is
49. amples using a new link provided at the top of each section in the HTML version of the Abaqus Keywords Reference Manual The abaqus findkeyword utility allows you to search the sample input files included with the Abaqus release When you click the link the instructions for using the utility Querying the keyword problem database Section 3 2 13 of the Abaqus Analysis User s Manual are displayed e Inthe Abaqus HTML manuals the width of the dividing line between the table of contents frame and the text frame has been increased making it easier to drag the line to change the width of the frames 1 3 Enhancements to the Abaqus environment file The following enhancements have been made to the Abaqus environment file e The environment file variable used to activate GPGPU solver acceleration in Abaqus Standard is now named gpus previously the variable name was gpu e The Iminteractivequeuing environment file variable can be used to allow Abaqus CAE or Abaqus Viewer sessions running interactively to queue for a license if one is not available Queuing sessions running interactively Section 2 2 e The license_server_type environment file variable identifies the type of license server software used by Abaqus clients FLEXNET or DSLS For the Dassault Syst mes license server the dsls_config_file environment file variable specifies the path to the configuration file e The mp_num_parallel_ftps environment file variable controls the nu
50. an now be defined in an Abaqus CFD model in Abaqus CAE which increases the coverage of Abaqus product functionality Description Previously only uniform distributions for distributed body heat fluxes were available in Abaqus CAE for an Abaqus CFD analysis You can now select an analytical field or a discrete field to define a spatially varying load PRESCRIBED CONDITIONS Abaqus CAE Usage All modules Model Create Model type CFD Load module Create Load Category Thermal Type Body heat flux Distribution select analytical field or discrete field Reference Abaqus CAE User s Manual e Defining a body heat flux Section 16 9 18 in the online HTML version of this manual 8 5 Impedance conditions in modal steady state dynamic analysis Product Abaqus Standard Benefits You can now perform subspace based steady state dynamic acoustic analysis with impedance conditions based on eigenmodes extracted by the AMS eigensolver Description You can define impedance conditions in subspace based steady state dynamic analysis if the proceeding eigenvalue extraction step is performed using the AMS eigensolver or the Lanczos eigensolver based on the SIM architecture Both acoustic and coupled structural acoustic analyses are supported You should expect reduced analysis time because the SIM architecture is much more efficient than the traditional architecture for large scale linear dynamic analyses References Abaqus Analysis
51. an now be used in transient eddy current and magnetostatic analyses Description Previously available in time harmonic eddy current analyses you can now define nonuniform magnetic vector potential on a surface UDEMPOTENTIAL nonuniform volume current density UDECURRENT and nonuniform surface current density UDSECURRENT in transient eddy current and magnetostatic analyses For more information see Magnetostatic analysis in Abaqus Standard Section 4 5 and Transient eddy current analysis in Abaqus Standard Section 4 6 References Abaqus Analysis User s Manual e Eddy current analysis Section 6 7 5 e Magnetostatic analysis Section 6 7 6 Abaqus User Subroutines Reference Manual e UDECURRENT Section 1 1 23 e UDEMPOTENTIAL Section 1 1 24 e UDSECURRENT Section 1 1 26 15 3 Abaqus SCRIPTING INTERFACE 16 Abaqus Scripting Interface This chapter discusses using the Abaqus Scripting Interface to write user scripts Abaqus makes every attempt to be backward compatible and can execute most Abaqus Scripting Interface scripts from previous releases of Abaqus However backward compatibility is not guaranteed beyond several releases of Abaqus and it is recommended that you upgrade your commands to the most recent release A complete list of Abaqus Scripting Interface commands that have changed is included in in the Abaqus Scripting Reference Manual This chapter provides an overview of the fol
52. an now save these session objects and session options to a file so that you can use them in subsequent sessions Description Session objects and session options can now be saved to the model database to an output database or to a settings file in XML format for use in subsequent sessions Figure 2 2 shows the new Save Session Objects amp Options dialog box which illustrates the types of objects and options that you can now save You can save or load categories of session objects and options individually for example you can choose to retain all the display groups in your session but exclude any view cuts you have defined However you Oo GENERAL ENHANCEMENTS gt Save Session Objects amp Options xj Destination goesceseg Boesoess File name settings xml 3 aM 9 objects IV Display groups M Paths IV xY data IV Free body definitions M view cuts I List of active view cuts and free bodies IV Current view 11 views in toolbar GM E options V ODB display result M Common M Contour IV Superimpose MV Material orientation IV Ply stack plot M Symbol ae Free body MV view cut free body and slicing tabs only Cancel Figure 2 2 Session objects and options that can now be saved to a file for future use 4 must save or load all of the session objects or options within a particular category for example you can save all of the display groups in your session but not just one selected di
53. analysis capabilities except nonlinear dynamic analysis using explicit time integration provided in the Abaqus Explicit program and the add on analysis functionality described below Abaqus Explicit This product provides nonlinear transient dynamic analysis of solids and structures using explicit time integration Its powerful contact capabilities reliability and computational efficiency on large models also make it highly effective for quasi static applications involving discontinuous nonlinear behavior Abaqus CFD This product is a computational fluid dynamics program with extensive support for preprocessing simulation and postprocessing in Abaqus CAE Abaqus CFD provides scalable parallel CFD simulation capabilities to address a number of nonlinear coupled fluid thermal and fluid structural problems Preprocessing and postprocessing Abaqus CAE This product is a Complete Abaqus Environment that provides a simple consistent interface for creating submitting monitoring and evaluating results from Abaqus simulations Abaqus CAE is divided into modules where each module defines a logical aspect of the modeling process for example defining the geometry defining material properties generating a mesh submitting analysis jobs and interpreting results Abaqus Viewer This subset of Abaqus CAE contains only the postprocessing capabilities of the Visualization module It uses the output database odb to obtain results from the analysi
54. ap Color options enable you to control the cap that appears when you display the portion of the cutting plane on the view cut You can display the entire cap with a single user specified color or you can display the current colors of each component in the model on the cutting plane Both of these cap color options were previously nested under a single color button Figure 2 6 shows the new arrangement that allows you to choose the color style you want to use view Cut Options sume On Cut C Specify E y color OK Apply Cancel Cap Color Figure 2 6 Updated cap color options in the View Cut Options dialog box Abaqus CAE Usage All modules except the Visualization module View Cut Manager click Options select Use body color Reference Abaqus CAE User s Manual e Customizing the cap color for a view cut Section 80 2 6 in the online HTML version of this manual MODELING 3 Modeling This chapter discusses features related to creating your model such as node and element definition in Abaqus Standard Abaqus Explicit and Abaqus CFD part and assembly definition in Abaqus CAE importing and exporting models to or from Abaqus CAE and repairing problematic geometry It provides an overview of the following enhancements e Modeling enhancements for electromagnetic analyses Section 3 1 e SIMULIA Associative Interface for Abaqus CAE Section 3 2 e New naming conventio
55. aqus CAE Products Abaqus Standard Abaqus CAE MATERIALS Benefits Abaqus CAE now supports material models for magnetic permeability and electrical conductivity that allow you to carry out time harmonic eddy current analyses Description Abaqus CAE supports electromagnetic capabilities to carry out time harmonic eddy current analyses see Time harmonic electromagnetic analysis in Abaqus CAE Section 4 3 You need to define magnetic permeability everywhere in the domain and electrical conductivity in the conductor regions The material properties can be isotropic orthotropic or anisotropic and can also be defined to be frequency temperature and or field variable dependent Only linear magnetic and electrical behaviors can be modeled Abaqus CAE Usage Property module Material editor Electrical Magnetic Magnetic Permeability or Electrical Conductivity References Abaqus CAE User s Manual e Defining electrical conductivity Section 12 11 1 in the online HTML version of this manual e Defining magnetic permeability Section 12 11 4 in the online HTML version of this manual 6 3 New electrical magnetic material behavior category in material editor Product Abaqus CAE Benefits The material editor reorganization categorizes the material behaviors to improve usability Description With the addition of support for electromagnetic material models in Abaqus CAE the Electrical Magnetic material behavior category
56. ases e Free interface or mixed interface substructures e Partially retained nodes with not all degrees of freedom retained e Gravity load and substructure load cases ANALYSIS TECHNIQUES e Coupled acoustic structural substructure e Unsymmetric substructures References Abaqus Analysis User s Manual e Natural frequency extraction Section 6 3 5 e Defining substructures Section 10 1 2 Abaqus Keywords Reference Manual e FREQUENCY e SUBSTRUCTURE GENERATE 5 2 Matrix functionality enhancements Product Abaqus Standard Benefits Enhancements to matrix generation and to the matrix usage functionality significantly improve the usability of matrix modeling techniques Description The matrix generation procedure has been enhanced to allow you to specify public nodes that will be visible in the matrix usage model all other nodes are designated as internal nodes and effectively hidden in the matrix usage model By specifying public nodes you can reduce the number of user defined nodes in the matrix usage model which simplifies the new remapping process described below The behavior for writing generated global matrices has been changed By default matrices are generated in the matrix input text format which now retains negative node numbers for internal nodes previously internal node labels were converted into large positive numbers If matrices are generated in the text labeling format internal nod
57. assault Syst mes or its
58. ate dynamic analysis Section 6 3 9 e Defining substructures Section 10 1 2 e Generating matrices Section 10 3 1 13 2 Parallel execution in the analysis input file processor Product Abaqus Standard EXECUTION Benefits Parallel execution in the analysis input file processor reduces the analysis time and memory usage for certain analyses Description Parallel execution is now supported in the analysis input file processor for most Abaqus Standard analyses Parallel execution in the analysis input file processor includes MPI based domain decomposition and MPI based remote file access If parallel execution occurs in the analysis input file processor the domain decomposition information is printed in the data file as well as in the message file Parallel execution is not yet supported for analyses that include any of the following options e DSLOAD SUBMODEL e IMPORT e MAP SOLUTION e POST OUTPUT e RESTART e SUBMODEL TYPE SURFACE e SYMMETRIC MODEL GENERATION e SYMMETRIC RESULTS TRANSFER 13 3 Multiple GPGPUs supported in the direct sparse solver Product Abaqus Standard Benefits Support for multiple GPGPUs in the direct sparse solver provides faster execution on computers with multiple GPGPU cards Description Multiple GPGPU cards can now be used on a single workstation or cluster compute node Execution in MPI based parallel mode is supported with GPGPU acceleration References Abaqus Anal
59. broutines utilities and plug ins This chapter discusses additional user programs that can be run with Abaqus It provides an overview of the following enhancements e Enhancements to user subroutines UAMP and VUAMP Section 15 1 e User subroutine to define damage behavior with Mullins effect in Abaqus Explicit Section 15 2 e User subroutines for pressure and velocity boundary conditions in Abaqus CFD Section 15 3 e Enhancements for defining nonuniform magnetic vector potential and nonuniform current density Section 15 4 15 1 Enhancements to user subroutines UAMP and VUAMP Products Abaqus Standard Abaqus Explicit Benefits You can now define user amplitude properties directly within the input file that calls the user subroutine rather than having to define properties within the user subroutine itself This new feature allows for a smoother workflow in that the user subroutine no longer has to be modified each time an amplitude property is changed Description User subroutines UAMP and VUAMP have been modified so that amplitude properties can be read in from the input file that calls the user subroutine The new PROPERTIES parameter allows multiple amplitude properties to be defined on the data lines of user amplitude definitions References Abaqus Analysis User s Manual e Amplitude curves Section 33 1 2 Abaqus Keywords Reference Manual e AMPLITUDE Abaqus User Subroutines Reference Manual e
60. category choices were revised and the boundary condition category choices were expanded to reflect the availability of prescribed conditions for electromagnetic analyses in Abaqus CAE and to improve usability Description With the addition of support for prescribed conditions in an electromagnetic analysis in Abaqus CAE the Electrical load category was renamed to Electrical Magnetic Load types that were previously listed in the Electrical category are now listed in the Electrical Magnetic category and Surface current density and Body current density have been added A new Electrical Magnetic boundary condition category was added Electric potential previously listed in the Other category is now listed in the Electrical Magnetic category and Magnetic vector potential has been added Figure 8 1 and Figure 8 2 show the new category choices The category choices available are dependent upon the type of analysis procedures you are performing Abaqus CAE Usage Load module Load gt Create Category Electrical Magnetic BC Create Category Electrical Magnetic PRESCRIBED CONDITIONS gt Create Load x Name SurF_current_density Step step 1 Procedure Electromagnetic Time harmonic Category Types for Selected Step Mechanical Surface current density Thermal Body current density Acoustic Fluid Electrical Magnetic Mass diffusion Other conc _ Figure 8 1 Lo
61. d modifying contact stabilization assignments for general contact Section 15 13 4 in the online HTML version of this manual e Specifying surface property assignments for general contact Section 15 13 5 in the online HTML version of this manual 10 5 Surface smoothing enhancements Products Abaqus Standard Abaqus Explicit Abaqus CAE Benefits Surface smoothing methods improve the accuracy of contact stresses and reduce solution noise for common types of curved contact surfaces Description Faceted representations of curved surfaces often lead to inaccuracies in contact stresses and other types of solution noise Circumferential and spherical smoothing methods have been available in previous releases of Abaqus Standard to enhance robustness and solution accuracy for surface to surface contact formulations involving element based surfaces These smoothing methods introduce geometric corrections to better represent the curved shape and they remain effective after relative motion between contact surfaces The circumferential and spherical smoothing methods are now also available in Abaqus Explicit for general contact Furthermore a toroidal smoothing method has been added for Abaqus Standard and Abaqus Explicit the toroidal smoothing method cannot be defined in Abaqus CAE For example in the model of the ball bearing shown in Figure 10 10 spherical smoothing can be defined on the surfaces of the balls and the retainer and toroidal smoo
62. d or field dependent stiffness proportional damping Use the new DEPENDENCIES parameter to define the number of field variables when ALPHA TABULAR and or BETA TABULAR DEBOND The DEBONDING FORCE parameter can now be used with TYPE ENHANCED VCCT 17 2 mod S mod E mod C mod C mod S C mod S mod S mod S mod C mod S SUMMARY OF CHANGES DECURRENT This option is now available in transient eddy current and magnetostatic analyses DEPVAR Use the new CONVERT parameter to support user subroutine based conversion of finite elements to SPH particles DISTRIBUTION A new value is available for the LOCATION parameter Set LOCATION NONE to define a distribution used with a fluid boundary condition DISTRIBUTION TABLE Labels for PRESSURE and VOLUME to define a distribution table for pressure that varies with the total volume of fluid crossing a surface can now be specified on the data line DLOAD Use the new load type ROTDYNF to define rotordynamic loads in an Abaqus Standard analysis Use the new load type PDBF to define a porous drag body force load in an Abaqus CFD analysis DRUCKER PRAGER CREEP Use the new TIME parameter to specify whether creep time or total time is used in the time hardening and Singh Mitchell relations DSECURRENT This option is now available in transient eddy current and magnetostatic analyses ELECTROMAGNETIC Use the new DIRECT parameter to select direc
63. dary conditions using assembled fasteners and template models Product Abaqus CAE Benefits You can now define connector loads and connector boundary conditions using assembled fasteners to specify bolt preloading in Abaqus CAE This enhancement improves the usability of assembled fasteners Description For models containing assembled fasteners you can define connector loads connector force and connector moment and connector boundary conditions connector displacement connector velocity and connector acceleration to specify bolt preloading When you select an assembled fastener in the load or boundary condition editor the wire sets that are associated with the referenced template model populate the template set list You can select a wire set from the template model as shown in Figure 8 6 to define the connector load or boundary condition You must ensure that the selected wire set has a section assignment that has the available components of relative motion for which you want to define the load or boundary condition Abaqus CAE Usage Load module Create Load Category Mechanical Types connector loads Create Boundary Condition Category Mechanical Types connector boundary conditions select an assembled fastener and select a wire set from the Template set list CETE x Name Load 1 Type Connector force Step Step 1 Dynamic Explicit Assembled Fastener Fasteners 1 Template set Wire 1 Set 1 gt
64. deling e Chapter 12 Meshing features related to meshing your model e Chapter 13 Execution commands and utilities for running any of the Abaqus products e Chapter 14 Output and visualization obtaining postprocessing and visualizing results from Abaqus analyses e Chapter 15 User subroutines utilities and plug ins additional user programs that can be run with Abaqus e Chapter 16 Abaqus Scripting Interface using the Abaqus Scripting Interface to write user scripts Each entry in these chapters clearly indicates the Abaqus product or products to which the feature applies and includes cross references to more detailed information Chapter 17 Summary of changes summarizes in tabular format the changes to Abaqus keyword options user subroutines and output variable identifiers 1 1 Key features of Abaqus 6 12 This section provides a list of the most significant new capabilities and enhancements available in Abaqus 6 12 refer to the table of contents for a complete list of new features e Performance improvements Batch preprocessing and initialization Substructure generation using AMS Multiple GPGPU cards 1 1 5 INTRODUCTION TO Abaqus 6 12 e Associative import Transfer an assembly from CATIA V6 to Abaqus CAE e Feature support in Abaqus CAE Time harmonic electromagnetic analysis Coupled thermal electrical structural analysis Surface fluid cavities a
65. desired solution If those scripts use the findAt scripting command to locate the generated entities and perform further operations you may need to modify the entities within the sketch so that they will be found by the command Abaqus CAE Usage Sketcher or Sketch module Add constraints or dimensions to an existing or new sketch References Abaqus CAE User s Manual e Constraining dimensioning and parameterizing a sketch Section 20 12 in the online HTML version of this manual e Translating Sketcher objects along a vector Section 20 16 1 in the online HTML version of this manual MODELING 3 6 Projecting mesh edges or nodes onto a sketch Product Abaqus CAE Benefits You can now project mesh edges or nodes onto a sketch when you add features to a mesh part This enhancement improves the sketching capabilities when you make changes to a mesh part Description When you sketch the profile for a feature that you are adding to a mesh part Abaqus CAE now enables you to project mesh edges and nodes onto the sketch sheet The improved algorithm for projecting mesh edges or nodes also allows you to project nodes and element edges as references Projected mesh edges are not constrained to the background because the mesh is transient If you modify or delete the mesh the sketch does not regenerate after remeshing Abaqus CAE Usage Sketch module Add References References Abaqus CAE User s Manual e Addin
66. ds to invoke these programs are described below abaqus append joins separate results files into a single file abaqus ascfil translates Abaqus results files between ASCII and binary formats which is useful for moving results files between different computer types abaqus cosimulation runs a co simulation using a single command where the analysis job options specify two values one for each child analysis abaqus cse runs the SIMULIA Co Simulation Engine CSE process that governs co simulation between Abaqus Standard Abaqus Explicit and Abaqus CFD Typically you are not required to invoke the CSE controller process it is invoked automatically when you run the Abaqus co simulation procedure abaqus doc accesses the Abaqus documentation collection using a web browser abaqus emload converts results output from an electromagnetic analysis for use as loads in a subsequent analysis abaqus encrypt creates an encoded password protected version of an Abaqus input file while abaqus decrypt converts an encrypted file back into its original unencoded format abaqus fetch extracts example input files from the libraries included with the release abaqus findkeyword provides a list of sample problems that use the specified Abaqus options This utility will help users find examples of features they may be using for the first time abaqus free converts all fixed format data in an input file to free format abaqus licensing provides mana
67. e 14 1 Field output request editor Abaqus CAE User s Manual e Creating and modifying output requests Section 14 4 5 14 2 Displaying multiple slices of view cut data Product Abaqus CAE Benefits You can now display multiple view cut slices that show the state of your model at a series of locations Slices can be displayed at regularly spaced intervals along the range of the active view cut or at locations along a predefined path in your session This enhancement provides a helpful visualization tool for investigation of several locations in your model at once especially for curved parts Description Abaqus 6 11 introduced an enhancement that enables you to display a series of free bodies at regular intervals along the range of the active view cut This release expands upon that capability by allowing you to display a series of view cut slices for a series of locations in your model You can display slices at regular intervals along the range of the active view cut or you can position the slices so that they follow a predefined path in your session The left side of Figure 14 2 shows a simple extruded part with a node based path defined along one of its curved edges the right side shows the view cut slices positioned at the nodes of that path You can also display a free body cut at each view cut slice location to show resultant forces and moments When you use slicing to display multiple free body cuts Abaqus CAE aligns one o
68. e and in V lizy France SIMULIA provides sales services and support through a global network of regional offices and distributors For more information visit www simulia com About Dassault Systemes As a world leader in 3D and Product Lifecycle Management PLM solutions Dassault Syst mes brings value to more than 100 000 customers in 80 countries A pioneer in the 3D software market since 1981 Dassault Systemes develops and markets PLM application software and services that support industrial processes and provide a 3D vision of the entire lifecycle of products from conception to maintenance to recycling The Dassault Systemes portfolio consists of CATIA for designing the virtual product SolidWorks for 3D mechanical design DELMIA for virtual production SIMULIA for virtual testing ENOVIA for global collaborative lifecycle management and 3DVIA for online 3D lifelike experiences Dassault Syst mes shares are listed on Euronext Paris 13065 DSY PA and Dassault Systemes ADRs may be traded on the US Over The Counter OTC market DASTY For more information visit www 3ds com JS DASSAULT SUSTEMES subsidiaries in the US and or other countries Other company product and service names may be trademarks or service marks of their respective owners Dassault Systemes 2012 www 3ds com Abaqus the 3DS logo SIMULIA CATIA Solidworks DELMIA ENOVIA 3DVIA and Unified FEA are trademarks or registered trademarks of D
69. e labels are now converted into large positive numbers previously internal node labels were not converted when using this format The matrix usage functionality has been enhanced to allow using matrices with negative node labels for the Abaqus internal nodes User defined matrix nodes specified as public nodes can be remapped renamed to different node labels in the matrix usage model This new remapping feature allows you to use several instances of the same matrix and it makes the matrix usage functionality similar to using substructures References Abaqus Analysis User s Manual e Defining matrices Section 2 11 1 e Generating matrices Section 10 3 1 ANALYSIS TECHNIQUES Abaqus Keywords Reference Manual e MATRIX ASSEMBLE e MATRIX GENERATE e MATRIX INPUT e MATRIX OUTPUT 5 3 Enhancements to the XFEM based crack propagation capability Product Abaqus Standard Benefits The extended finite element method XFEM allows you to model discontinuities such as cracks along an arbitrary solution dependent path during an analysis This method can now be extended to support axisymmetric elements and frictional contact between the cracked element surfaces To reduce run time for large analyses full parallel execution of the element operations is now available Description XFEM allows you to model crack growth without remeshing the crack surfaces since it does not require the mesh to match the geometry of the crack
70. e meshing left and structured meshing right on the middle section of a cylindrical mounting boss MESHING Figure 12 1 Comparison of free and structured triangular face meshes Abaqus CAE Usage Mesh module Mesh Controls Select faces of solid regions from the prompt area and choose the faces to which you will assign mesh controls References Abaqus CAE User s Manual e What can I do with a boundary mesh Section 17 10 5 e Assigning mesh controls Section 17 18 1 in the online HTML version of this manual 12 2 Combining orphan and native mesh features in a model Product Abaqus CAE Benefits Many of the modeling and meshing tools in Abaqus CAE have been enhanced to support use with both geometry and orphan nodes and elements You can now add geometric features to an orphan mesh You can also use some mesh editing options that were previously limited to use with orphan elements to modify native meshes Likewise some procedures that were previously limited to use with geometry now allow selection of orphan mesh features The options that you have available to modify a part or assembly are greatly expanded with this change in modeling techniques Description The distinctions between a native or geometry based model and an orphan mesh model have been reduced so that tools and techniques previously available for use with only one of these model types can now be used universally Orphan nodes and elements geometry
71. e steps do not allow fluid pressure changes for these steps the pressure is fixed at the value from the end of the previous step Figure 8 4 shows the Edit Predefined Field and the Edit Boundary Condition dialog boxes for fluid cavity pressure Edit Predefined Field Edf Edit Boundary Condition x Name Predefined Field 4 Name BC 9 Type Fluid cavity pressure Type Fluid cavity pressure Step Initial Step Step 7 Static General Fluid cavity interaction fint s x Fluid cavity interaction int 5 gt Fluid cavity pressure fiz Fluid cavity pressure fo OK Cancel Amplitude Ramp v AY OK Cancel Figure 8 4 The fluid cavity pressure predefined field and boundary condition editors Abaqus CAE Usage Load module Create Boundary Condition Category Other Types Fluid cavity pressure specify the fluid cavity interaction Create Predefined Field Step Initial Category Other Types Fluid cavity pressure specify the fluid cavity interaction References Abaqus CAE User s Manual e Defining a fluid cavity pressure boundary condition Section 16 10 15 in the online HTML version of this manual e Defining a fluid cavity pressure field Section 16 11 15 in the online HTML version of this manual PRESCRIBED CONDITIONS 8 7 New rotordynamic load Product Abaqus Standard Benefits A new distributed rotordynamic load ROTDYNF is available that can be used to study compl
72. ear flexibility data the Abaqus user may include an arbitrary number of preloading steps before the linear flexibility data are obtained Multiple flexible components generated by Abaqus can be included in an MSC ADAMS model Most Abaqus structural elements are supported by the interface INTRODUCTION TO Abaqus 6 12 Associative interfaces and geometry translators SIMULIA Associative Interface for Abaqus CAE This add on capability for Abaqus CAE creates a connection between a CATIA V6 session and an Abaqus CAE session This connection can be used to transfer model information from CATIA V6 to Abaqus CAE Subsequent modifications to the model in CATIA V6 can be propagated to the Abaqus CAE model while retaining any analysis features such as loads or boundary conditions that were defined on the model in Abaqus CAE The CATIA V6 model in an assembly file eaf format can also be imported directly into Abaqus CAE CATIA V5 Associative Interface This add on capability for Abaqus CAE creates a connection between a CATIA V5 session and an Abaqus CAE session This connection can be used to transfer model information from CATIA V5 to Abaqus CAE Subsequent modifications to the model in CATIA V5 can be propagated to the Abaqus CAE model while retaining any analysis features such as loads or boundary conditions that were defined on the model in Abaqus CAE The geometry of CATIA V5 format Part CATPart and Product CATProduct files can also be impor
73. een two surfaces in an Abaqus Standard general contact interaction The main purpose of the damping is to stabilize rigid body motion before the surfaces come into contact at which point contact and frictional forces counteract the motion A contact stabilization definition is created in Abaqus CAE using the contact stabilization editor you provide a name for the stabilization definition and a set of stabilization factors see Figure 10 6 10 7 INTERACTIONS gt Edit Contact Stabilization Name Default_Stabilization Zero stabilization distance Analysis default Specify Reduction Factor 1s Scale Factor i tw Tangential Factor pooo Amplitude ramp NM OK Defaults Cancel Figure 10 6 Contact stabilization editor Within a general contact definition you can assign a stabilization definition to specific surface pairs using the stabilization assignment editor see Figure 10 7 Contact stabilization definitions in Abaqus CAE can be assigned in any analysis step other than the initial step gt Edit Stabilization Assignments E xj 4 M Select Pairs and Stabilization Stabilization Assignments Default_Stabilization Stabilization Large_Stabilization Assigned Small_Stabilization Surf 3 Surf 1 Default_Stabilization Surf 2 Surf 4 Large_Stabilization wv in this step only Note When assignments overlap more recent assignments override earlier assignments
74. elds and boundary conditions in Abaqus CAE New porous drag body force load in Abaqus CFD Base motion boundary conditions and PSD amplitudes in Abaqus CAE Total flux distribution option for surface heat flux in Abaqus CAE Defining connector loads and boundary conditions using assembled fasteners and template models Surface fluid cavities and fluid exchanges in Abaqus CAE Enhancements to general contact definitions in Abaqus CAE Surface smoothing enhancements Eulerian Lagrangian thermal contact Gap electrical conductance in Abaqus CAE Defining a seam in an Abaqus CFD analysis Local controls for tetrahedral meshing Combining orphan and native mesh features in a model Persistent display of seeds Enhanced node editing functionality Dragging nodes Improved display for selection of mesh parts Node and element numbering in flattened input files Adding a boundary layer to a tetrahedral mesh Mesh retention during feature additions and modifications Requesting field output on exterior nodes and elements in Abaqus CAE Displaying multiple slices of view cut data Enhancements to free body display Editing free body cuts Selecting elements by topology in the Visualization module Enhancement to material orientation plot display Nodal field output for tie constraints Maximum damage initiation output for shells Air blast pressure load output Reading X Y data from history output based on the step time Filtering selections for results outpu
75. en made to the items that define an Abaqus model including keywords user subroutines and output variables For more information on these modifications refer to the preceding chapters The following identifiers are used new New in Abaqus 6 12 mod Fxisted in Abaqus 6 11 but has been modified or enhanced in Abaqus 6 12 S New modified or removed in Abaqus Standard E New modified or removed in Abaqus Explicit C New modified or removed in Abaqus CFD 17 1 Changes in Abaqus options This section summarizes the changes and the additions that have been made to the options that define an Abaqus model new E ADAPTIVE MESH REFINEMENT Activate adaptive mesh refinement in an Eulerian domain mod S E AMPLITUDE Use the new PROPERTIES parameter to specify the number of user amplitude properties that are defined either on the data lines or directly within user subroutine UAMP or VUAMP mod S BEAM SECTION A new section type is available Set SECTION THICK PIPE to define a thick walled circular section mod S BOUNDARY Use the new PHANTOM parameter to apply boundary conditions to a phantom node that is originally located coincident with the specified real node in an enriched element mod S CAP CREEP Use the new TIME parameter to specify whether creep time or total time is used in the time hardening and Singh Mitchell relations 5 SUMMARY OF CHANGES mod C mod S mod S mod S mod S m
76. ence Abaqus Analysis User s Manual e Output Section 4 1 1 14 11 EXODUS II and NEMESIS output for Abaqus CFD field output Product Abaqus CFD Benefits Field output from an Abaqus CFD analysis is now available for the EXODUS II and NEMESIS output formats These output formats allow for postprocessing results from serial or parallel jobs using third party visualizers e g ParaView Description The new EXODUS II and NEMESIS output is available for all existing field output requests and is activated using the command line option field with the value exodus or nemesis Reference Abaqus Analysis User s Manual e Output Section 4 1 1 14 12 Reading X Y data from history output based on the step time Product Abaqus CAE Benefits You can now select the step time as the basis for reading X Y data from history output in an output database to improve usability in multistep analyses Description When reading X Y data from history output for time based analyses X values are taken as total time from the start of the analysis or in the case of a restarted analysis as total time from the start of the last continuation of the analysis You can now use the step time as the time basis This enhancement is beneficial for multistep analyses for example when there is a difference in the order of magnitude of the step times You can reduce the number of operations required on X Y data for example if you want to create
77. ent analysis steps Abaqus CAE Usage Interaction module Create Interaction Step Initial Types for Selected Step Fluid cavity Select a cavity point and cavity surface Select a fluid cavity interaction property 10 2 INTERACTIONS Edit Interaction xi Name Int 6 Type Fluid exchange Step Initial t Between cavities Fluid cavity interaction fint s x Fluid exchange property fintProp 4 S Effective exchange area ft Cancel Figure 10 2 Editing a fluid exchange interaction Create Interaction Step Initial Types for Selected Step Fluid exchange Select a definition To environment or Between cavities Select a fluid exchange interaction property Create Interaction Property Type Fluid cavity Definition Hydraulic or Pneumatic Enter the data to complete the selected definition Create Interaction Property Type Fluid exchange Definition Bulk viscosity Mass flux Mass rate leakage Volume flux Volume rate leakage Enter the data to complete the selected definition References Abaqus Analysis User s Manual e Fluid cavity definition Section 11 5 2 e Fluid exchange definition Section 11 5 3 Abaqus CAE User s Manual e Understanding interactions Section 15 3 e Understanding interaction properties Section 15 4 10 3 INTERACTIONS 10 2 Feature edge contact enhancements for general contact in Abaqus Standard Product Abaqus Standard Benefits The
78. erences Abaqus Analysis User s Manual e Electrical contact properties Section 36 3 1 Abaqus CAE User s Manual e Specifying gap conductance for electrical contact property options in Defining a contact interaction property Section 15 14 1 in the online HTML version of this manual 10 13 ENGINEERING FEATURES 11 Engineering features This chapter discusses engineering features related to part and assembly modeling in Abaqus CAE It provides an overview of the following enhancement e Defining a seam in an Abaqus CFD analysis Section 11 1 11 1 Defining a seam in an Abaqus CFD analysis Products Abaqus CFD Abaqus CAE Benefits The ability to define seams in an Abaqus CFD analysis simplifies the modeling process for fluid structure interaction analyses involving shells membranes Description You can now define a seam in an Abaqus CFD analysis For an Abaqus CFD analysis involved in a fluid structure interaction with shells membranes a seam defines a zero thickness shell in the mesh You can create a double sided surface that represents the seam and select that surface as the region for the fluid structure interaction boundary Abaqus CAE places overlapping duplicate nodes along a seam when the mesh is generated A seam cannot extend along the boundaries of a part and must be embedded within a face of a two dimensional part or within a cell of a solid part Because a seam modifies the mesh you cann
79. ernal degrees of freedom associated with C3D8I elements As shown in Figure 2 1 the batch preprocessing time has decreased significantly in recent releases especially as the model size increases Data points are not shown for the largest models in previous releases because memory limits were reached during batch preprocessing in these cases Memory usage reductions enable these models to run successfully with Abaqus 6 12 2 2 Queuing sessions running interactively Products Abaqus CAE Abaqus Viewer Benefits You can now allow Abaqus CAE or Abaqus Viewer sessions running interactively to queue for a license Previously only sessions running without the graphical user interface could be queued Description You can use the new environment file variable Iminteractivequeuing to indicate whether an interactive Abaqus CAE or Abaqus Viewer session should queue for a license if one is not available To allow Abaqus CAE or Abaqus Viewer sessions running interactively to queue for a license set this parameter equal to ON The default value is OFF References Abaqus Analysis User s Manual e Using the Abaqus environment settings Section 3 3 1 Abaqus Installation and Licensing Guide e License management parameters Section 4 1 6 2 3 Persistence for session objects and options Product Abaqus CAE Benefits By default many objects and options that you specify in Abaqus CAE persist only for the duration of your session You c
80. erwise maintains the sets and surfaces in the model such that the loads interactions and other items are preserved in the same way as they are for geometry When you create mesh parts from geometry Abaqus CAE copies and converts the contents of geometry sets and surfaces as needed and applies them to mesh locations equivalent to the locations on the original geometry For example vertices are converted to nodes and edges are converted to a combination of nodes and elements When you create a mesh part from assembly instances you can choose to suppress the original geometric instances and replace them with the new mesh part instance The loads boundary conditions section assignments and reinforcements are all applied automatically to the mesh part through the converted sets and surfaces If you choose to switch back to the geometry the sets and surfaces still contain the geometric content vertices edges and faces so the loads boundary conditions etc are still maintained Abaqus CAE Usage Mesh module Mesh Create Mesh Part Reference Abaqus CAE User s Manual e Creating a mesh part Section 17 20 in the online HTML version of this manual GENERAL ENHANCEMENTS 2 6 Controlling part instance display from the Model Tree or from the viewport Product Abaqus CAE Benefits You can now control the display of part instances using new options in the Model Tree and in the current viewport This enhancement makes it easier
81. essureBC User subroutine to specify prescribed pressure boundary conditions new C SMACfdUserVelocityBC User subroutine to specify prescribed velocity boundary conditions mod S UAMP Two new variables can be passed in for information props user specified array of material constants associated with this amplitude definition and nProps user defined number of material constants associated with this amplitude definition 17 6 mod S mod S mod S mod E mod E mod E new E SUMMARY OF CHANGES UDECURRENT A nonuniform volume current density vector can now be specified in transient eddy current and magnetostatic analyses UDEMPOTENTIAL Surface based nonuniform magnetic vector potential can now be specified in transient eddy current and magnetostatic analyses UDSECURRENT A nonuniform surface current density vector can now be specified in transient eddy current and magnetostatic analyses VFRIC_COEF Two variables that are passed in for information have been renamed the average current temperature between the master and slave surfaces at the contact point has been renamed tempAvg nBlock and the average current value of all the user specified field variables between the master and slave surfaces at the contact point has been renamed fieldAvg nBlock nFields VUFIELD Two changes were made to the variables passed in for information the increment number for step KSTEP was renamed JFLAGS i _ufld_kInc
82. ex dynamic behaviors induced by gyroscopic moments such as critical speeds unbalanced responses and whirling phenomena in rotating structures Description The rotordynamic load ROTDYNF is a special load type that can be used to study the vibrational response of three dimensional models of axisymmetric structures such as a flywheel in a hybrid energy storage system that are spinning about their axes of symmetry in a fixed reference frame This is in contrast to the previously available centrifugal loads Coriolis forces and rotary acceleration loads which are formulated in a rotating frame The intended workflow for the rotordynamic load is to define it in a nonlinear static step to establish the centrifugal load effects and load stiffness terms associated with a spinning body The nonlinear static step can then be followed by a sequence of linear dynamic analyses such as complex eigenvalue extraction and or a subspace or direct solution steady state dynamic analysis to study complex dynamic behaviors References Abaqus Analysis User s Manual e Distributed loads Section 33 4 3 Abaqus Keywords Reference Manual e DLOAD 8 8 New porous drag body force load in Abaqus CFD Products Abaqus CFD Abaqus CAE Benefits A new distributed porous drag force load PDBF is available that can be used to study flows through porous media Description The porous drag body force load is used to study the flow through porous media The v
83. f the tangential components of each free body cut along the same Y axis You can specify this Y axis value in the Free Body tabbed page of the View Cut Options dialog box You can also use slicing to control the data that are included when you investigate the X Y data along a path By default the XY Data from Path functionality returns data from the points or nodes that comprise the path However you can specify instead that Abaqus CAE obtain data at a regular series of intervals along the path 14 2 OUTPUT AND VISUALIZATION Figure 14 2 Path definition left and resulting view cut slices along that path right Abaqus CAE Usage Visualization module View cut options Slicing tabbed page Display slicing View cut options Free Body tabbed page Y axis setting for Normal and tangential component resolution XY Data from Path dialog box Uniform spacing References Abaqus CAE User s Manual e Choosing the path locations at which to obtain data Section 48 3 1 in the online HTML version of this manual e Customizing slicing options Section 80 2 9 in the online HTML version of this manual 14 3 Enhancements to free body display Product Abaqus CAE 14 3 OUTPUT AND VISUALIZATION Benefits You can now display free body data for nonplanar view cuts which enables you to investigate resultant forces and moments for regions in which planar view cuts are not suitable In addition free body cut labels are now d
84. fo 3ds com Puerto Madero Buenos Aires Tel 54 11 4312 8700 Horacio Burbridge 3ds com Stockholm Sweden Tel 46 8 68430450 simulia nordic info 3ds com Warrington Tel 44 1925 830900 simulia uk info 3ds com Authorized Support Centers SMARTtech Sudamerica SRL Buenos Aires Tel 54 11 4717 2717 KB Engineering Buenos Aires Tel 54 11 4326 7542 Solaer Ingenieria Buenos Aires Tel 54 221 489 1738 SMARTtech Mec nica Sao Paulo SP Tel 55 11 3168 3388 Synerma s r o Ps ry Prague West Tel 420 603 145 769 abaqus synerma cz 3 Dimensional Data Systems Crete Tel 30 2821040012 support 3dds gr ADCOM Givataim Tel 972 3 7325311 shmulik keidar adcomsim co il WorleyParsons Services Sdn Bhd Kuala Lumpur Tel 603 2039 9000 abaqus my worleyparsons com Kimeca NET SA de CV Mexico Tel 52 55 2459 2635 Matrix Applied Computing Ltd Auckland Tel 64 9 623 1223 abaqus tech matrix co nz BudSoft Sp z 0 0 Poznan Tel 48 61 8508 466 info budsoft com pl TESIS Ltd Moscow Tel 7 495 612 44 22 info tesis com ru WorleyParsons Pte Ltd Singapore Tel 65 6735 8444 abaqus sg worleyparsons com Finite Element Analysis Services Pty Ltd Parklands Tel 27 21 556 6462 feas feas co za Principia Ingenieros Consultores S A Madrid Tel 34 91 209 1482 simulia principia es Taiwan Simutech Solution Corporation Taipei R O C Tel 886 2 2507 9550 camilla simutech com tw Thailand WorleyParsons Pte Ltd Singap
85. g reference geometry Section 20 14 in the online HTML version of this manual e Projecting edges onto a sketch Section 20 15 in the online HTML version of this manual 3 7 Viewing model database attributes in the Visualization module Products Abaqus CAE Abaqus Viewer Benefits You can now open a model database in the Visualization module and display and query data from one of its models for a selected step The ability to display the mesh plot contours and symbols for model data such as force or pressure loads and probe model data can help you refine your model before submitting an analysis Description Abaqus CAE now enables you to use the display and query functionality in the Visualization module to examine data from one of the models in the current model database before you perform an analysis You can perform the following actions to investigate model data e Display the mesh e Display node and element labels e Plot contours or symbols of selected loads predefined fields or interactions e Probe the mesh or selected loads or predefined fields All models in the current model database are available for selection from the new Model Databases container of the Results Tree You can expand the container for an individual model database to display or hide its part instances and to select the analysis step for which you want to investigate data If you switch MODELING to another module and modify the selected model Abaqus
86. gement and monitoring tools for FLEXnet and Dassault Syst mes DS licensing INTRODUCTION TO Abaqus 6 12 abaqus make compiles and links user written postprocessing programs for Abaqus and creates user defined libraries of Abaqus Standard and Abaqus Explicit user subroutines abaqus networkDBConnector creates a connection to a network ODB server that can be used to access a remote output database abaqus restartjoin appends an output database file produced by a restart analysis of a model to the output database produced by the original analysis of that model abaqus odbcombine combines the results data in two or more Abaqus output database files into a single output database file abaqus odbreport creates organized reports of output database information in text HTML or CSV file formats abaqus python accesses the Python interpreter abaqus resume resumes an Abaqus analysis job abaqus script initiates a Python scripting session abaqus substructurecombine combines the model and results data produced by two of a model s substructures into a single output database file abaqus suspend suspends an Abaqus analysis job abaqus terminate terminates an Abaqus analysis job abaqus upgrade upgrades an input file or output database file from previous versions of Abaqus to the current version Platform support Analysis products Abaqus Standard Abaqus Explicit and Abaqus CFD and interactive products Abaqus CAE and Abaqus Viewer a
87. h the following feature names when you import them into your model e CATIA Geometry 1 e ACIS Geometry 1 e IGES Geometry 1 e Parasolid Geometry 1 Abaqus CAE Usage Part module File Import Part MODELING Reference Abaqus CAE User s Manual e Importing parts Section 10 7 2 in the online HTML version of this manual 3 4 Retaining intersecting boundaries during part import from ACIS Product Abaqus CAE Benefits When you import solid parts from an ACIS file into Abaqus CAE and combine them into a single part you can now retain the boundaries where the combined parts intersect This enhancement can help you eliminate invalid geometry for imported geometry Description The Create Part from ACIS File dialog box now provides an option that allows you to retain the intersecting boundaries between imported solid parts when you combine multiple parts from an ACIS file into a single part in Abaqus CAE The new option is shown in Figure 3 4 gt Create Part from ACIS File x Name Repair Part Attributes Scale Name Part name facis _part M Part Filter Import all parts Create individual parts Combine into single part Stitch edges using tolerance For shells 1 Ir Import part number fi Figure 3 4 New Retain intersecting boundaries for solids option for part import from ACIS geometry 3 5 MODELING Abaqus CAE Usage Part module File Import Part Retai
88. hancements Gap electrical conductance in Abaqus CAE Parallel execution of the element operations Parallel execution in the analysis input file processor Multiple GPGPUs supported in the direct sparse solver Enhancements to user subroutines UAMP and VUAMP PRODUCT INDEX Section 15 4 Section 16 1 Section 16 2 Enhancements for defining nonuniform magnetic vector potential and nonuniform current density Expanded object coverage for definition of custom kernel data Descriptive header in the journal file Abaqus Explicit Section 2 1 Performance improvements for batch preprocessing and initialization Section 5 5 Adaptive mesh refinement for an Eulerian mesh Section 5 6 Smoothed particle hydrodynamics improvements Section 6 5 Enhancements to Mullins effect in Abaqus Explicit Section 6 6 Viscoelasticity for cohesive elements with traction separation behavior in Abaqus Explicit Section 6 7 Rayleigh damping enhancement in Abaqus Explicit Section 6 9 Ductile damage initiation criterion enhancements in Abaqus Explicit Section 7 4 Defining the anisotropic mass tensor Section 8 6 Fluid cavity pressure predefined fields and boundary conditions in Abaqus CAE Section 9 1 Enhancements to tie constraint deletion due to element erosion Section 9 2 Improved performance for connector elements Section 10 4 Section 10 5 Section 10 6 Section 13 4 Section 14 7 Section 14 8 Section 14 9 Section 15 1 Section 15 2 Section 16 1 Section 1
89. he AMS frequency extraction step is mandatory for subsequent substructure generation However in Abaqus 6 12 eigenmode recovery at the user specified node set in the AMS frequency extraction step is now available with the substructure generation procedure For substructures with no matrix recovery or selective matrix recovery substructure generation performance is improved and disk space requirements are reduced As shown for Model 3 in Table 5 1 substructure generation with eigenmodes requested only at a small set of specified nodes runs 2 2 times faster than full recovery and uses approximately 500 GB less in disk space for the substructure generation step Due to the changes in the order of the system of equations regarding retained nodes it is possible to observe slight differences in the number of eigenmodes extracted by AMS in Abaqus 6 11 compared to Abaqus 6 12 These differences are expected since the AMS eigenmodes close to the user specified maximum frequency are generally less accurate and more sensitive to perturbations e g changes in the order of the system of equations or parallel execution of the element operator generation procedure However the substructure usage level results of the subsequent modal dynamic procedures are very close to the results in Abaqus 6 11 and previous releases The new substructure generation capability does not support the following features the conventional algorithm will be used for these unsupported c
90. ic coupled thermal stress analysis You can model conductive heat transfer and frictional heat generation between the contacting surfaces 10 12 INTERACTIONS References Abaqus Analysis User s Manual e Eulerian analysis Section 14 1 1 e Thermal contact properties Section 36 2 1 Abaqus CAE User s Manual e Defining a contact interaction property Section 15 14 1 e Defining contact in Eulerian Lagrangian models Section 28 3 Abaqus Keywords Reference Manual e CONTACT e GAP CONDUCTANCE e GAP HEAT GENERATION e SURFACE INTERACTION 10 7 Gap electrical conductance in Abaqus CAE Products Abaqus Standard Abaqus CAE Benefits You can now define gap electrical conductance as a contact interaction property in Abaqus CAE which increases the coverage of Abaqus product functionality Description You can use the contact property editor in Abaqus CAE to define the electrical conductance between two surfaces in a contact interaction The conductance is proportional to the difference in electric potentials across the interface The conduction is a function of the clearance separation between the surfaces and can be a function of the contact pressure The Edit Contact Property dialog box lets you enter conductance values in a data table providing clearance dependency data and or pressure dependency data Abaqus CAE Usage Interaction module Contact property editor Electrical Electrical Conductance Ref
91. icit The improvements tend to be most significant for models with one or more of the following characteristics e large number of part instances e large number of contact pairs surface based tie pairings or fasteners e large number of material orientations e large number of boundary conditions e large number of film conditions e general contact involving a large fraction of nodes in a model e submodel analysis These performance improvements build on improvements that were made in Abaqus 6 11 Figure 2 1 shows batch preprocessing times across three Abaqus releases for an example involving an array of blocks tied to a flat surface Data points for models with different numbers of blocks are shown in these plots Each block is a separate instance of the same part definition so the overall model size scales linearly with the number of blocks 2 1 Oo GENERAL ENHANCEMENTS 140 120 amp Abaqus 6 10 EF l e Abaqus 6 11 100 Abaqus 6 12 80 60 Time minutes 40 20 2000 4000 6000 8000 10000 Number of part instances Figure 2 1 Batch preprocessing performance improvements across recent releases for an example with many blocks tied to a flat plate GENERAL ENHANCEMENTS The largest model considered has ten thousand blocks that are each modeled with one thousand incompatible mode elements element type C3D8I such that the overall model has 170 million variables including int
92. ignments 4 IV Highlight selected regions OK Cancel Figure 10 8 Specifying feature angles in an Abaqus Explicit interaction Contact initializations in an Abaqus Standard general contact interaction are used to specify whether initial overclosures should be resolved without generating stresses and strains or treated as interference fits that are gradually resolved over multiple increments Abaqus CAE now allows you to specify an initial interference distance as part of an initialization nodes within the requested search tolerance are repositioned using strain free adjustments so the surfaces are overclosed by the specified interference distance the overclosure is resolved as an interference fit when the analysis begins You can also now specify an initial clearance distance nodes within the requested search tolerance are repositioned using strain free adjustments so the surfaces are separated by the specified clearance distance Figure 10 9 highlights the new options in the contact initialization editor 10 9 INTERACTIONS Edit Contact Initialization x Name ctnit 1 Initial Overclosures C Resolve with strain free adjustments Treat as interference fits IV Specify interference distance 2 3 Specify clearance distance M Adjustments Ignore overclosures greater than Analysis default Specified value Ignore initial openings greater than Ana
93. isplayed in a smaller font which improves legibility for tasks in which you want to investigate resultant forces and moments in a greater number of locations Description Abaqus CAE now enables you to display resultant forces and moments for cylindrical view cuts spherical view cuts and isosurface view cuts In earlier releases this functionality was limited to planar view cuts only In addition Abaqus CAE now uses a smaller font size for displaying the labels on a free body cut The smaller size helps you to display a greater number of free body cuts without the labels obscuring each other or covering portions of the model Reference Abaqus CAE User s Manual e Displaying a cut section and its resultant force and moment vectors Section 80 2 2 in the online HTML version of this manual 14 4 Editing free body cuts Product Abaqus CAE Benefits Abaqus CAE now enables you to edit any of the free body cuts in your session Description When you edit a free body cut you cannot edit the selection method that was used as part of its definition but you can change the following aspects of its definition e You can edit the set of edges faces or nodes and elements that define the free body cross section When you change the free body cross section Abaqus CAE customizes the default selection item and method in the Free Body Cross Section dialog box so that they match the settings that were selected the last time you edited the free
94. its definition is also reflected in the display in the Visualization module If your model includes a predefined field that is specified using a mapped field the mapping data are included in the visualization as well 3 8 MODELING You can also perform queries of your model in the Visualization module and probe for model data from the current model database Support for these options enables you to investigate aspects of your model such as the composition of the mesh throughout the assembly or to retrieve the specific node where a particular boundary condition is located When model data are displayed in the Visualization module you can also color code the part instances and adjust your display of part instances using display groups Abaqus CAE Usage Visualization module Results Tree Model Databases Model name References Abaqus CAE User s Manual e Understanding the role of the Visualization module Section 40 1 e Selecting the field output to display Section 42 5 3 8 Creating geometry from orphan elements Product Abaqus CAE Benefits You can now use orphan element faces to create geometric faces and in turn entire parts Description You can create geometric faces that follow the contour of orphan element faces In addition to selecting orphan element faces individually and by angle you can use the following new selection methods to choose orphan element faces from which to create new geometry e Limiting
95. l e Eddy current analysis Section 6 7 5 Abaqus CAE User s Manual e Configuring a time harmonic electromagnetic analysis in Configuring linear perturbation analysis procedures Section 14 11 2 in the online HTML version of this manual 4 3 ANALYSIS PROCEDURES 4 4 Coupled thermal electrical structural analysis in Abaqus CAE Products Abaqus Standard Abaqus CAE Benefits You can now perform a coupled thermal electrical structural analysis in Abaqus CAE which increases the coverage of Abaqus product functionality Description Abaqus CAE now supports Abaqus Standard analyses that fully couple the effects of a simultaneous heat transfer electrical and structural procedure A fully coupled thermal electrical structural analysis is the union of a coupled thermal displacement analysis and a coupled thermal electrical analysis Coupling between the temperature and electrical degrees of freedom arises from temperature dependent electrical conductivity and internal heat generation Joule heating which 1s a function of the electrical current density Coupling between the temperature and displacement degrees of freedom arises from temperature dependent material properties thermal expansion and internal heat generation which is a function of inelastic deformation of the material Coupling between the electrical and displacement degrees of freedom arises in problems where electricity flows between contact surfaces Abaqus C
96. library Section 28 1 3 e Three dimensional solid element library Section 28 1 4 Abaqus CAE User s Manual e Element type assignment Section 17 5 3 7 2 Unsymmetric storage for linear coupled stiffness and viscous damping for connections in Abaqus Standard Product Abaqus Standard ELEMENTS Benefits A common modeling technique in the field of rotordynamics is to use unsymmetric stiffness and damping matrices to model fluid film bearings supporting a rotating structure Abaqus Standard now supports frequency dependent unsymmetric linear coupled stiffness and viscous damping matrices to model fluid film bearings in rotordynamic analyses Description For the unsymmetric linear coupled stiffness case you define the spring stiffness matrix components D which are used in the equation Fi 5 Dijuj j where F is the force in the it component of relative motion u is the motion of the j component and Dj is the coupling between the it and jt components For the unsymmetric linear coupled viscous damping case you define the damping coefficient matrix components C which are used in the equation F 5 CijUj J where F is the force in the it component of relative motion v is the velocity in the jt component and C j is the coupling between the it and jt components References Abaqus Analysis User s Manual e Connector elastic behavior Section 31 2 2 e Connector damping behavior
97. linear and must be defined everywhere in the domain Nonlinear magnetic behavior can be defined in terms of one or more B H curves References Abaqus Analysis User s Manual e Electromagnetic analysis procedures Section 6 7 1 e Magnetostatic analysis Section 6 7 6 e Magnetic permeability Section 26 5 3 e Two dimensional solid element library Section 28 1 3 e Three dimensional solid element library Section 28 1 4 Abaqus Keywords Reference Manual e D EM POTENTIAL e DECURRENT e DSECURRENT e MAGNETIC PERMEABILITY e MAGNETOSTATIC e NONLINEAR BH Abaqus User Subroutines Reference Manual e UDECURRENT Section 1 1 23 e UDEMPOTENTIAL Section 1 1 24 e UDSECURRENT Section 1 1 26 Abaqus Verification Manual e Magnetostatic analysis Section 3 6 2 4 6 Transient eddy current analysis in Abaqus Standard Product Abaqus Standard Benefits You can now perform a transient eddy current analysis that accounts for full coupling between the electric and magnetic fields Description You can now calculate the eddy currents that are induced in a conductor placed within a time varying magnetic field The magnetic field can be generated by a coil carrying a time varying current or it can be specified directly by means of appropriate boundary conditions loads The solution procedure is based on obtaining a transient solution to Maxwell s equations describing electromagnetic phenomena
98. ll modules Model Edit Attributes Model name toggle on Do not use parts and assemblies in input files 12 7 MESHING Reference Abaqus CAE User s Manual e Specifying model attributes Section 9 8 4 in the online HTML version of this manual 12 8 Adding a boundary layer to a tetrahedral mesh Product Abaqus CAE Benefits You can now add a boundary layer composed of one or more layers of wedge elements extruded from the exterior faces surrounding a tetrahedral mesh Adding layers of small elements along the walls allows improved analysis of boundary effects in fluid flow and heat transfer analyses Description In previous releases of Abaqus the construction of a boundary layer near external surfaces would have been a tedious process Now you can easily specify a boundary layer when you select the mesh controls for a region The thinnest layers of wedge elements are at the walls where boundary effects are greatest and you can increase the layer thickness toward the interior of the model When you assign mesh controls to regions and choose a tetrahedral element shape the option to insert a boundary layer appears near the bottom of the Mesh Controls dialog box Click the Assign Controls button to access the Boundary Layer dialog box so that you can define the layers of wedge elements You must enter the following information e The height thickness of the element layer adjacent to the walls e A growth factor that dete
99. lowing enhancements e Expanded object coverage for definition of custom kernel data Section 16 1 e Descriptive header in the journal file Section 16 2 e Abaqus PDE improvements Section 16 3 e Skipping the last command during session recovery Section 16 4 e Faster tab completion Section 16 5 e Selected errors now classified as an AbaqusExceptionType Section 16 6 e Better control over writing messages to the journal file Section 16 7 e Reformatting commands in Python files with proper indentation Section 16 8 e Improved message handling and reporting of plug ins Section 16 9 e Stop button for scripts Section 16 10 16 1 Expanded object coverage for definition of custom kernel data Products Abaqus Standard Abaqus Explicit Abaqus CAE Benefits You can now store custom data for many of the objects within an Abaqus CAE model database this functionality was previously available only for the Mdb object This enhancement enables you to store the data associated with custom classes and functions in the specific objects to which these data pertain Description The customKernel module is now available for use in the following objects in an Abaqus CAE model database e Amplitude e Assembly e BoundaryCondition e ConstrainedSketch e Interaction e InteractionProperty e Job e Load 8 Abaqus SCRIPTING INTERFACE e Material e Model e Part e PartInstance e Reposi
100. lysis default Specified value OK Defaults Cancel Figure 10 9 New contact initialization options Abaqus CAE Usage Interaction module Interaction Contact Stabilization Create Create Interaction General contact Standard Contact Properties Stabilization assignments Edit Feature edge criteria assignment editor Select the surface click the arrows to transfer the surface to the list of feature assignments and enter PERIMETER ALL PICKED NONE or an angle value in the Feature Edge Criteria column Contact initialization editor Treat as interference fits Specify interference distance or Specify clearance distance References Abaqus Analysis User s Manual e Surface properties for general contact in Abaqus Standard Section 35 2 2 e Controlling initial contact status in Abaqus Standard Section 35 2 4 e Stabilization for general contact in Abaqus Standard Section 35 2 5 e Assigning surface properties for general contact in Abaqus Explicit Section 35 4 2 10 10 INTERACTIONS Abaqus CAE User s Manual e Creating contact initializations Section 15 12 4 in the online HTML version of this manual e Creating contact stabilization definitions Section 15 12 5 in the online HTML version of this manual e Specifying and modifying contact initialization assignments for general contact Section 15 13 3 in the online HTML version of this manual e Specifying an
101. material behavior For the time hardening power law and Singh Mitchell models you can specify the time type Similarly for user defined creep models either the total or the creep time can be used In this case both times are passed as parameters into user subroutine CREEP References Abaqus Analysis User s Manual e Rate dependent plasticity creep and swelling Section 23 2 4 e Two layer viscoplasticity Section 23 2 11 e Extended Drucker Prager models Section 23 3 1 e Modified Drucker Prager Cap model Section 23 3 2 Abaqus Keywords Reference Manual e CAP CREEP e CREEP e DRUCKER PRAGER CREEP e VISCOUS 6 11 Nonlinear magnetic behavior Product Abaqus Standard Benefits You can now specify nonlinear magnetic behavior of an electromagnetic medium through direct specification of one or more B H curves Description The magnetic behavior of some electromagnetic media is characterized by a magnetic permeability that strongly depends upon the strength of the magnetic field Such nonlinear response is typically described through one for isotropic behavior or three for orthotropic behavior B H curves that define in tabular form the strength of the magnetic flux density as a function of the strength of the magnetic field The model provided in Abaqus is suitable for modeling soft magnetic materials that show little or no hysteresis MATERIALS References Abaqus Analysis User s Manual e Edd
102. mber of simultaneous MPI file transfers when performing parallel file staging using MPI based parallelization For more information see Using the Abaqus environment file Section 4 1 of the Abaqus Installation and Licensing Guide GENERAL ENHANCEMENTS 2 General enhancements This chapter describes the following general enhancements that have been made to Abaqus e Performance improvements for batch preprocessing and initialization Section 2 1 e Queuing sessions running interactively Section 2 2 e Persistence for session objects and options Section 2 3 e Boolean operations on sets and surfaces Section 2 4 e Consistency of objects during instance merging operations Section 2 5 e Controlling part instance display from the Model Tree or from the viewport Section 2 6 e Inverting component display and undoing display group changes from the Display Group toolbar Section 2 7 e Clearer organization for view cut color selection options Section 2 8 2 1 Performance improvements for batch preprocessing and initialization Products Abaqus Standard Abaqus Explicit Benefits The performance improvements result in faster job start up and reduced memory usage enabling larger model sizes in some cases Description Many instances of performance bottlenecks and excessive memory usage have been removed from batch preprocessing and initialization associated with Abaqus Standard and Abaqus Expl
103. ment if you write your own kernel scripting module and functions Your command should not call journalMethodCa11 if the command changes the Mdb object using built in Abaqus Scripting Interface commands because these are journaled by default Your command should call journalMethodCa11 if the command changes the customData object in the model 16 4 Abaqus SCRIPTING INTERFACE database For more information see Executing commands Section 6 3 in the Abaqus GUI Toolkit User s Manual 16 8 Reformatting commands in Python files with proper indentation Benefits Abaqus now includes a utility that enables you to reformat a Python file with standard indentation This release also provides proper indentation for commands in the replay file that are generated by the recovery file Description The redentABQ py utility re indents a Python source file by adjusting the leading white space in front of Python commands and in front of comments When you perform a recovery Abaqus now provides improved indentation for the entries in a replay rpy file that are generated from the recovery rec file Reference Abaqus Scripting Reference Manual e redentABQ module Section 52 1 16 9 Improved message handling and reporting of plug ins Product Abaqus CAE Benefits You can now display exceptions associated with the import of plug ins when you start Abaqus CAE Description By default Abaqus CAE does not display the exceptions ass
104. n for imported CAD parts Section 3 3 e Retaining intersecting boundaries during part import from ACIS Section 3 4 e Constraints in the Sketcher Section 3 5 e Projecting mesh edges or nodes onto a sketch Section 3 6 e Viewing model database attributes in the Visualization module Section 3 7 e Creating geometry from orphan elements Section 3 8 e Exporting contour plot data to 3D XML Section 3 9 e Creating sets and surfaces during selection operations Section 3 10 e Enhancements to mapped analytical fields in Abaqus CAE Section 3 11 3 1 Modeling enhancements for electromagnetic analyses Products Abaqus Standard Abaqus CAE Benefits The addition of the electromagnetic model type attribute allows the Abaqus CAE interface to be tailored to perform an electromagnetic analysis in Abaqus Standard New features in several modules of Abaqus CAE allow the creation of electromagnetic parts and sections for electromagnetic analyses Description When you create a model database you can now select an electromagnetic model type to specify that you are modeling an electromagnetic analysis see Time harmonic electromagnetic analysis in Abaqus CAE Section 4 3 Most of the functionality presented in the Abaqus CAE interface is filtered to display only functionality that is valid for the electromagnetic model type For example mechanical loads are not valid for an electromagnetic analysis the
105. n intersecting boundaries for solids Reference Abaqus CAE User s Manual e Importing parts from an ACIS format file Section 10 7 4 in the online HTML version of this manual 3 5 Constraints in the Sketcher Product Abaqus CAE Benefits The constraint solver used to manage the addition of constraints and dimensions to a sketch has been updated This update affects constraint resolution in the Sketch module Description The constraint solver used in the Sketcher for the last several releases has been replaced The new solver may show some different behavior in its solution of a desired constraint compared to the previous one When you are creating a new sketch for a part these differences should be inconsequential For example if you change the length dimension of a block the new solver may adjust the right edge to achieve the desired value whereas the old one may have adjusted the left edge When you upgrade a model that was created in a previous Abaqus release consider fully constraining your sketches in the old release first to avoid any potential for changes If you have sketches that are generated via scripts the generated entities should be identical to those created in previous releases However their exact location may change due to the addition of constraints using the new solver If the commands in those scripts use indices the scripts may execute without any issues However you should check the sketch to ensure the
106. nd fluid exchanges Base motion boundary conditions and PSD amplitudes Contact stabilization feature edges and contact initialization e New modeling options Parallel network viscoelastic material model Thick walled pipe elements Rotordynamic load e Contact enhancements Feature edge contact in Abaqus Standard Eulerian Lagrangian thermal contact e Fluid analysis Implicit advection Non Newtonian viscosity e Electromagnetic analysis Magnetostatic analysis Transient eddy current analysis Nonlinear magnetic behavior e Eulerian analysis Adaptive mesh refinement e General usability Maximum damage initiation output in shells Tie constraint deletion with element erosion e Abaqus CAE usability Plot and probe selected model data in the Visualization module Session object persistence Create geometry from orphan elements Boundary layer meshing Combine orphan and native mesh features in a part INTRODUCTION TO Abaqus 6 12 Modify a mesh by dragging nodes View cut display The remaining chapters in this book provide details on these and other new features of Abaqus 6 12 In addition to the enhancements listed here most of the known bugs in Abaqus 6 11 are corrected 1 2 Abaqus products Individual components of the Abaqus suite are described in this section Analysis Abaqus Standard This general purpose finite element analysis program includes all
107. ndoing display group changes from the Display Group toolbar Product Abaqus CAE Benefits You can now invert the display of model components in the viewport with a single mouse click You can also undo or redo the changes you make to a display group directly from the Display Group toolbar These enhancements provide a quick shortcut for workflows that previously required several steps Description When you click the new button in the Display Group toolbar shown in Figure 2 5 Abaqus CAE inverts the display of your model all the components that were removed from the currently selected display group will be displayed and all the components that were displayed will be hidden This enhancement is a shortcut for functionality using the Either button in the Create Display Group or Edit Display Group dialog boxes HN AR C An Figure 2 5 Display Group toolbar with the new Invert Display button The Display Group toolbar also now provides undo and redo buttons that enable you to rollback the changes you make to a display group Abaqus CAE Usage All modules Display Group toolbar click Reference Abaqus CAE User s Manual e Understanding display group Boolean operations Section 78 1 2 GENERAL ENHANCEMENTS 2 8 Clearer organization for view cut color selection options Product Abaqus CAE Benefits The View Cut Options dialog box now provides a clearer organization for the cap color selection options Description The C
108. now available in Abaqus Explicit Description Pressure loading due to an incident shock wave caused by an air explosion is calculated using the CONWEP model in Abaqus Explicit The new element field output variable IWCONWEP can now be requested on the element faces on which you apply this type of pressure load Abaqus CAE Usage Step module Field output request editor Output Variables Forces Reactions IWCONWEP References Abaqus Analysis User s Manual e Abaqus Explicit output variable identifiers Section 4 2 2 e Defining air blast loading for incident shock waves using the CONWEP model in Abaqus Explicit in Acoustic and shock loads Section 33 4 6 Abaqus CAE User s Manual e Creating and modifying output requests Section 14 4 5 14 10 Shear rate and viscosity field output available in Abaqus CFD Product Abaqus CFD Benefits Shear rate output and viscosity element field output are now available in Abaqus CFD to visualize engineering shear strain rates and spatially varying viscosities in non Newtonian flows Description The following field output variables are now available in an Abaqus CFD analysis for improved visualization in non Newtonian flows 14 8 OUTPUT AND VISUALIZATION e SHEARRATE element and nodal field output to visualize engineering shear strain rates e VISCOSITY element field output can be requested at the element centers to visualize spatially varying viscosities Refer
109. ns capable of providing accurate contact stress predictions despite having mismatched meshes across the contact interface The finite sliding surface to surface formulation always uses multiple slave nodes per contact constraint and is not recommended for contact involving gasket elements References Abaqus Analysis User s Manual e Using the small sliding tracking approach in Contact formulations in Abaqus Standard Section 37 1 1 Abaqus Keywords Reference Manual e CONTACT PAIR 10 4 Enhancements to general contact definitions in Abaqus CAE Products Abaqus Standard Abaqus Explicit Abaqus CAE Benefits Several advanced options for general contact definitions can now be specified in Abaqus CAE These enhancements augment the capabilities for creating complex general contact interactions within Abaqus CAE Description The following options associated with a general contact interaction can now be defined in Abaqus CAE e Contact stabilization in an Abaqus Standard interaction e Specification of feature edges in an Abaqus Standard interaction e Additional methods for defining feature edges in an Abaqus Explicit interaction e Specification of an interference distance as part of a contact initialization in Abaqus Standard e Specification of an initial clearance distance as part of a contact initialization in Abaqus Standard Contact stabilization introduces viscous damping to oppose incremental relative motion betw
110. o debond in one increment without cutting back the increment size when the VCCT fracture criterion is satisfied The original VCCT technique has been enhanced to allow more nodes at and ahead of the crack tip to debond in one increment rather than cutting back the increment size until the fracture criterion is no longer satisfied for all the nodes ahead of the crack tip The forces at the debonded nodes are released completely immediately during the following increment The original VCCT criterion uses the principles of linear elastic fracture mechanics LEFM To account for ductile resistance you can specify two different critical fracture energy release rates one for the onset of a crack and the other for the growth of a crack with the reduction of the debonding force being governed by a user specified critical fracture energy release rate for crack growth References Abaqus Analysis User s Manual e Crack propagation analysis Section 11 4 3 Abaqus Keywords Reference Manual e FRACTURE CRITERION 5 5 Adaptive mesh refinement for an Eulerian mesh Product Abaqus Explicit Benefits You can now use the adaptive mesh refinement feature to locally increase the mesh resolution of an Eulerian mesh during the analysis This feature greatly increases the computational efficiency compared to equivalent uniformly refined mesh Description The adaptive mesh refinement feature automatically refines coarsens elements in an Eulerian dom
111. ociated with the import of plug ins when you start the application If you want to expose these exceptions for debugging purposes set the environment variable ABQ_PLUGIN_DEBUG to at a command prompt before launching Abaqus CAE When this environment variable is set Abaqus CAE provides more trackback information about plug ins upon startup including the location and nature of any failures that occur Reference Abaqus CAE User s Manual e Displaying exceptions for imported plug ins at startup Section 81 11 16 10 Stop button for scripts Product Abaqus CAE Benefits You can now click a button to stop execution of a Python script in Abaqus CAE 16 5 Abaqus SCRIPTING INTERFACE Description The showStopButtonInGui command enables you to display a stop button in Abaqus CAE when the running time for a Python script has exceeded a duration specified in the calling script Abaqus CAE issues this command automatically when a command is entered from the command line interface CLI as part of a macro or from the File Run Script menu option The command is not issued automatically when a Python script is run from the user interface for example as part of a plug in but you can run it from the CLI or from a command prompt Reference Abaqus Scripting User s Manual e Executing scripts Section 5 1 16 6 SUMMARY OF CHANGES 17 Summary of changes This section summarizes the changes and the additions that have be
112. od S mod S mod E mod E mod S CFD The maximum allowable time increment and the time weight for the advective terms in the momentum and scalar transport equations can now be specified on the data lines CONNECTOR DAMPING Use the new UNSYMM and FREQUENCY DEPENDENCE parameters to define unsymmetric and or frequency dependent linear coupled viscous damping matrices respectively CONNECTOR ELASTICITY Use the new UNSYMM and FREQUENCY DEPENDENCE parameters to define unsymmetric and or frequency dependent linear coupled stiffness matrices respectively CONTACT PAIR The ADJUST parameter can now be used for self contact CONTROLS A new data entry has been added to this option when TYPE FSI is used This data entry can be used to define the solid fluid density ratio to control the FSI stabilization CREEP Use the new TIME parameter to specify whether creep time or total time is used in the time hardening relation D EM POTENTIAL This option is now available in transient eddy current and magnetostatic analyses DAMAGE INITIATION Use the new LODE DEPENDENT parameter in conjunction with CRITERION DUCTILE to define the equivalent plastic strain at the onset of ductile damage as a function of the Lode angle DAMPING The ALPHA parameter can now take the value TABULAR to define temperature and or field dependent mass proportional damping The BETA parameter can now take the value TABULAR to define temperature an
113. odes OK Apply Cancel Figure 12 3 The Undo options in the Edit Nodes dialog box The new buttons provide undo control over edits to nodal position only if you want to roll back or restore other changes in the Edit Mesh toolset use the undo and redo options in the Edit Mesh dialog box The Specification method options now enable you to make changes to nodal location by picking points in the t gt viewport When you click N for specification by offset you can select two points in the viewport that represent the offset vector you want to use When you use the same method to specify new coordinates you can select a new point directly from the viewport Abaqus CAE Usage Mesh module t Edit Nodes dialog box click Undo or Redo click m Reference Abaqus CAE User s Manual e Editing the position of selected nodes Section 64 5 2 in the online HTML version of this manual 12 5 MESHING 12 5 Dragging nodes Product Abaqus CAE Benefits You can now modify a mesh by dragging nodes to new locations Description You can drag interior and exterior nodes of a mesh to change element shape and quality Node dragging has been added to the node modification tools in the Edit Mesh toolset When you activate node dragging Abaqus CAE activates element quality highlighting so you can see any elements that have warnings or failures The highlighting is updated as you drag a node therefore you can immediatel
114. odule Various procedures Select by topology from the element selection methods prompt area Reference Abaqus CAE User s Manual e Using the topology method to select multiple elements Section 6 2 5 14 6 Enhancement to material orientation plot display Product Abaqus CAE Benefits By reducing the number of symbols displayed you can clarify the presentation of a material orientation plot Description A new material orientation plot option allows you to display fewer vector symbols in a material orientation plot to reduce symbol overcrowding and make the plot more readable Figure 14 3 shows the new option to adjust the symbol density Abaqus CAE Usage Visualization module Options Material Orientation drag the Symbol density slider to a value between High and Low 14 5 OUTPUT AND VISUALIZATION Color E M Show the 2 axis Color _ f IV Show the 3 axis Color EE fe J HEI Size Basis Screensize Model size Thickness Mi Arrowhead High Low D Symbol density OK Apply Defaults Cancel Figure 14 3 Adjusting the symbol density in the Material Orientation Plot Options dialog box Reference Abaqus CAE User s Manual e Customizing material orientation plot triads Section 46 4 1 in the online HTML version of this manual 14 7 Nodal field output for tie constraints Products Abaqus Explicit Abaqus CAE Benefits You can request tie related nodal
115. olid regions that will be meshed using tetrahedral elements This option gives you greater control over the appearance and quality of the tetrahedral mesh Only triangular elements can be assigned to the faces of tetrahedral regions If you assign the structured technique the selected faces must follow the same geometrical and topological requirements applicable for two dimensional structured meshing The new controls allow you to force Abaqus CAE to use a structured mesh or free mesh on selected faces overriding the technique assigned to the rest of the faces in the region For example when reviewing the boundary triangular mesh created using the default controls for a tetrahedral region a free mesh with mapped meshing where Abaqus CAE determines that mapped meshing is appropriate you may discover faces with a free mesh where you think a mapped mesh should be used You can now select the desired faces and assign the structured mesh technique Likewise if you find faces to which Abaqus CAE applied mapped meshing but the resulting triangular mesh is of poor quality you can assign the free mesh technique to those faces If you prevent Abaqus CAE from applying mapped meshing to appropriate faces of a tetrahedral mesh by setting mesh controls on the region you can use the new controls to allow mapped meshing on selected boundary faces without changing the surface mesh for the entire region Figure 12 1 shows the difference between the default fre
116. ompt area Reference Abaqus CAE User s Manual e What objects can you select from the viewport Section 6 1 1 3 11 Enhancements to mapped analytical fields in Abaqus CAE Product Abaqus CAE Benefits Abaqus CAE now offers mapped field support for two dimensional and axisymmetric models and for additional load types In addition you have the option to scale the source data coordinates which allows you to account for a mismatch of units Description Abaqus CAE provides several enhancements for mapped analytical fields Previously available only for three dimensional models you can now use mapped fields in two dimensional and axisymmetric models to define spatially varying parameter values from an external data source Plane strain elements element types CPE3 CPE4 CPE6 and CPE8 are now supported Mapped fields can be used to define the following distributed loads e Body concentration flux e Body heat flux e Surface concentration flux e Surface heat flux e Surface pore fluid flow The magnitude you specify in the load boundary condition predefined field or interaction is used as a multiplier for the mapped field data values but you can also enter scale factors to scale the source data coordinates for example to account for a mismatch of units i e meters to millimeters You can scale the source data coordinates provided from a point cloud data file or from an Abaqus output database file Abaqus CAE Usage Pro
117. on criterion in Abaqus Explicit as a function of Lode angle to improve damage predictions Description The ductile damage initiation criterion in Abaqus Explicit has been enhanced to allow the definition of the equivalent plastic strain at the onset of damage as a tabular function of Lode angle or deviatoric polar angle in addition to stress triaxility and strain rate The Lode angle which is related to the normalized third invariant of deviatoric stress has been shown experimentally to have a significant influence in the ductile fracture of aluminum alloys advanced high strength steels and other metals References Abaqus Analysis User s Manual e Damage initiation for ductile metals Section 24 2 2 Abaqus Keywords Reference Manual e DAMAGE INITIATION Abaqus Verification Manual e Progressive damage and failure of ductile metals Section 2 2 21 MATERIALS 6 10 Enhancements to creep models Product Abaqus Standard Benefits Now you can specify whether total time or creep time should be used in creep models in which time is used explicitly Description In some of the creep models available in Abaqus Standard such as the time hardening power law model and the Singh Mitchell model time is used explicitly Previously the total time was used in these models Now in addition to the total time the creep time can be used as well The creep time is computed as the sum of the times of procedures with time dependent
118. on for material failure and element deletion Abaqus CAE Usage Property module Material editor Mechanical Damage for Elastomers Mullins Effect Definition User Defined References Abaqus Analysis User s Manual e Mullins effect Section 22 6 1 e Energy dissipation in elastomeric foams Section 22 6 2 Abaqus CAE User s Manual e Mullins effect in Defining damage Section 12 9 3 in the online HTML version of this manual MATERIALS Abaqus Keywords Reference Manual e MULLINS EFFECT Abaqus User Subroutines Reference Manual e VUMULLINS Section 1 2 18 Abaqus Verification Manual e Mullins effect and permanent set Section 2 2 3 Abaqus Theory Manual e Mullins effect Section 4 7 1 6 6 Viscoelasticity for cohesive elements with traction separation behavior in Abaqus Explicit Products Abaqus Explicit Abaqus CAE Benefits You can now model rate dependent traction separation behavior in Abaqus Explicit Description In Abaqus Explicit time domain viscoelasticity can now be used to model rate dependent behavior of cohesive elements with traction separation elasticity The evolution equations for the normal and two shear nominal tractions take the form hO 00 f brll 9 as 0 ith t gr s t t s ds ZOELOES gr s t t s ds where t t t t and t t are the instantaneous nominal tractions at time tin the normal and the two local shear direction
119. ore Tel 65 6735 8444 abaqus sg worleyparsons com Turkey A Ztech Ltd Istanbul Tel 90 216 361 8850 info a ztech com tr Complete contact information is available at http www simulia com locations locations html INTRODUCTION TO Abaqus 6 12 1 Introduction to Abaqus 6 12 This document introduces features in Abaqus that have been added enhanced or updated since the Abaqus 6 11 release Chapter 1 provides a brief overview of the Abaqus products included in this release Chapters 2 16 provide short descriptions of new Abaqus 6 12 features in Abaqus Standard Abaqus Explicit Abaqus CFD and Abaqus CAE categorized by subject e Chapter 2 General enhancements general changes to the Abaqus interface e Chapter 3 Modeling features related to creating your model e Chapter 4 Analysis procedures features related to defining an analysis e Chapter 5 Analysis techniques features related to analysis techniques in Abaqus e Chapter 6 Materials new material models or changes to existing material models e Chapter 7 Elements new elements or changes to existing elements e Chapter 8 Prescribed conditions loads boundary conditions and predefined fields e Chapter 9 Constraints kinematic constraints e Chapter 10 Interactions features related to contact and interaction modeling e Chapter 11 Engineering features engineering features related to part and assembly mo
120. ot create a seam on a dependent part instance Abaqus CAE Usage Interaction module Special Crack Assign seam References Abaqus CAE User s Manual e Modeling cracks and seams in Using the Special menu in the Interaction module Section 15 12 14 in the online HTML version of this manual e Defining a fluid structure co simulation interaction Section 15 13 15 in the online HTML version of this manual MESHING 12 Meshing This chapter discusses features related to meshing your model It provides an overview of the following enhancements e Local controls for tetrahedral meshing Section 12 1 e Combining orphan and native mesh features in a model Section 12 2 e Persistent display of seeds Section 12 3 e Enhanced node editing functionality Section 12 4 e Dragging nodes Section 12 5 e Improved display for selection of mesh parts Section 12 6 e Node and element numbering in flattened input files Section 12 7 e Adding a boundary layer to a tetrahedral mesh Section 12 8 e Mesh retention during feature additions and modifications Section 12 9 12 1 Local controls for tetrahedral meshing Product Abaqus CAE Benefits You can now apply mesh controls to selected faces of solid regions that will be meshed with tetrahedral elements Description You can now use mesh controls to assign either structured or free mesh techniques to the faces of s
121. otal volume of fluid crossing a surface in an Abaqus CFD analysis PRESCRIBED CONDITIONS References Abaqus Analysis User s Manual e Boundary conditions in Abaqus CFD Section 33 3 2 Abaqus Keywords Reference Manual e FLUID BOUNDARY 8 11 Base motion boundary conditions and PSD amplitudes in Abaqus CAE Products Abaqus Standard Abaqus CAE Benefits New base motion boundary conditions and PSD amplitudes are available in Abaqus CAE which increases the coverage of Abaqus product functionality Description In Abaqus CAE you can now define base motion boundary conditions for modal superposition analyses Two types of boundary conditions are available base motion and secondary base You can create a boundary condition to specify the base motion of nodes in a modal dynamic step steady state dynamic mode based or subspace based step or random response step The base motion can be acceleration velocity or displacement You can create a secondary base motion boundary condition in a frequency extraction step The new PSD definition amplitude type allows you to define a frequency function that defines the frequency dependence of the random loading in a random response analysis step This amplitude curve represents the power spectral density function for the random noise source The PSD amplitude can be referenced in the correlation definition of a base motion boundary condition in a random response step Abaqus CAE Usage Load
122. ox with calibration data sets extracted from a biaxial test data set After you extract the individual data sets you can select the yield point on the primary curve from the viewport If desired you can also edit the data in the primary curve if you want to smooth its profile Hyperelasticity with permanent set calibration behaviors can be based on a single set of test data either uniaxial or biaxial or based on a data set of each type By default Abaqus CAE applies equal weight to both data sets if you choose both uniaxial and biaxial test data however you can adjust the definition if you want one of the data sets to factor more heavily into calculations of the plasticity material behavior and to a lesser extent calculations of Mullins effect 2 0 MATERIALS BiaxialbPS Strain BiaxialbPS Stress BiaxialbPrimary BiaxialbReload 2 BiaxialbReload 3 BiaxialbReload 4 BiaxialbUnload 2 BiaxialbUnload 3 BiaxialbUnload 4 L 1 1 1 1 1 ll 1 1 1 0 00 0 05 0 10 0 15 0 20 0 25 0 30 1 0 35 Figure 6 2 An X Y plot of loading unloading and reloading curves for biaxial data Abaqus CAE Usage Model Tree Create Calibration Behaviors container Hyperelasticity with permanent set Reference Abaqus CAE User s Manual e Calibrating data for hyperelasticity with permanent set in Defining calibration behaviors Section 12 17 4 6 2 Material models for electromagnetic problems in Ab
123. pability allows the user to import the geometry of CATIA V4 format parts and CATIA V4 assemblies model catdata and exp files directly into Abaqus CAE Geometry Translator for Parasolid This add on capability allows the user to import the geometry of Parasolid format parts and Parasolid assemblies x_t x_b and xmt files directly into Abaqus CAE 5 INTRODUCTION TO Abaqus 6 12 Translator utilities e Abaqus translators are provided with the release They are invoked through the Abaqus execution procedure the driver The translators and the commands to invoke them are described below abaqus fromansys translates an ANSYS input file to an Abaqus input file abaqus fromdyna translates an LS DYNA keyword file to an Abaqus input file abaqus fromnastran translates a Nastran bulk data file to an Abaqus input file abaqus frompamcrash translates a PAM CRASH input file to a partial Abaqus input file abaqus fromradioss translates a RADIOSS input file to a partial Abaqus input file abaqus tonastran translates an Abaqus input file to Nastran bulk data file format abaqus toOutput2 translates an Abaqus output database file to the Nastran Output2 file format abaqus tozaero enables you to exchange aeroelastic data between the Abaqus and ZAERO analysis products Other utilities e Additional programs are included with the release They are all invoked through the Abaqus execution procedure the driver The utilities and the comman
124. perty module Interaction module and Load module Tools Analytical Field Create Type Mapped field Coordinate scale factor Uniform or Nonuniform Reference Abaqus CAE User s Manual e Using analytical mapped fields Section 58 3 ANALYSIS PROCEDURES 4 Analysis procedures This chapter discusses features related to defining an analysis It provides an overview of the following enhancements Fluid analysis e Implicit advection in Abaqus CFD Section 4 1 e Porous media flows in Abaqus CFD Section 4 2 Electromagnetic analysis e Time harmonic electromagnetic analysis in Abaqus CAE Section 4 3 e Coupled thermal electrical structural analysis in Abaqus CAE Section 4 4 e Magnetostatic analysis in Abaqus Standard Section 4 5 e Transient eddy current analysis in Abaqus Standard Section 4 6 4 1 Implicit advection in Abaqus CFD Products Abaqus CFD Abaqus CAE Benefits Implicit treatment of advection or the convective transport terms helps in achieving larger stable time steps in Abaqus CFD simulations The implicit treatment relaxes the mesh size dependent Courant Freidrichs Levy CFL condition on the stable time step size The CFL condition for explicit advective schemes can be too restrictive for steady state analyses involving thin boundary layer meshes This feature is especially useful for marching quickly toward a steady state solution reducing simulation time by a factor of
125. qus Keywords Reference Manual e MULLINS EFFECT Abaqus User Subroutines Reference Manual e VUMULLINS Section 1 2 18 Abaqus Verification Manual e Mullins effect and permanent set Section 2 2 3 15 3 User subroutines for pressure and velocity boundary conditions in Abagqus CFD Product Abaqus CFD Benefits You can now define pressure and velocity boundary conditions in Abaqus CFD Description User subroutines for pressure and velocity boundary conditions are now available in Abaqus CFD New user subroutine utilities have been added as well to provide the current simulation state and other additional useful input to the user subroutine developer 15 2 USER SUBROUTINES UTILITIES AND PLUG INS References Abaqus Analysis User s Manual e Boundary conditions in Abaqus CFD Section 33 3 2 Abaqus Keywords Reference Manual e FLUID BOUNDARY Abaqus User Subroutines Reference Manual e SMACfdUserPressureBC Section 1 3 1 e SMACfdUserVelocityBC Section 1 3 2 e Obtaining scalar state information in an Abaqus CFD analysis Section 2 1 19 e Obtaining vector state information in an Abaqus CFD analysis Section 2 1 20 e Obtaining the MPI communicator in an Abaqus CFD analysis Section 2 1 21 15 4 Enhancements for defining nonuniform magnetic vector potential and nonuniform current density Product Abaqus Standard Benefits User subroutines UDEMPOTENTIAL UDECURRENT and UDSECURRENT c
126. ral analysis in Abaqus CAE Smoothed particle hydrodynamics improvements Material calibration for hyperelasticity with permanent set Material models for electromagnetic problems in Abaqus CAE New electrical magnetic material behavior category in material editor Enhancements to Mullins effect in Abaqus Explicit Viscoelasticity for cohesive elements with traction separation behavior in Abaqus Explicit Rayleigh damping enhancement in Abaqus Explicit Support for electromagnetic elements in Abaqus CAE Thick walled pipe elements in Abaqus Standard Defining the anisotropic mass tensor PRODUCT INDEX Section 8 1 Section 8 2 Section 8 3 Section 8 4 Section 8 6 Section 8 8 Section 8 11 Section 8 12 Section 8 13 Section 10 1 Section 10 4 Section 10 5 Section 10 6 Section 10 7 Section 11 1 Section 12 1 Section 12 2 Section 12 3 Section 12 4 Section 12 5 Section 12 6 Section 12 7 Section 12 8 Section 12 9 Section 14 1 Section 14 2 Section 14 3 Section 14 4 Section 14 5 Section 14 6 Section 14 7 Section 14 8 Section 14 9 Section 14 12 Section 14 13 Section 16 1 Section 16 2 Section 16 3 Section 16 4 Prescribing loads and boundary conditions in an electromagnetic analysis in Abaqus CAE New category choices for loads and boundary conditions in Abaqus CAE Changing the coordinate system for fluid velocity boundary conditions in Abaqus CAE Enhancements to distributed body heat flux Fluid cavity pressure predefined fi
127. ration using the AMS eigensolver Section 5 2 Matrix functionality enhancements Section 5 3 Enhancements to the XFEM based crack propagation capability Section 5 4 Enhancements to the Virtual Crack Closure Technique VCCT Section 6 2 Material models for electromagnetic problems in Abaqus CAE Section 6 8 Parallel network viscoelastic model Section 6 10 Section 6 11 Section 7 1 Section 7 2 Section 7 3 Section 7 4 Section 8 1 Section 8 5 Section 8 6 Section 8 7 Section 8 11 Section 10 2 Section 10 3 Section 10 4 Section 10 5 Section 10 7 Section 13 1 Section 13 2 Section 13 3 Section 15 1 Enhancements to creep models Nonlinear magnetic behavior Support for electromagnetic elements in Abaqus CAE Unsymmetric storage for linear coupled stiffness and viscous damping for connections in Abaqus Standard Thick walled pipe elements in Abaqus Standard Defining the anisotropic mass tensor Prescribing loads and boundary conditions in an electromagnetic analysis in Abaqus CAE Impedance conditions in modal steady state dynamic analysis Fluid cavity pressure predefined fields and boundary conditions in Abaqus CAE New rotordynamic load Base motion boundary conditions and PSD amplitudes in Abaqus CAE Feature edge contact enhancements for general contact in Abaqus Standard Improved robustness of small sliding surface to surface contact involving gaskets Enhancements to general contact definitions in Abaqus CAE Surface smoothing en
128. rding to their source orphan elements are colored green and native mesh elements are colored cyan Note The usages and references listed below are a sample of some of the more significant changes Many other procedures have been updated to incorporate selection of both geometry and orphan mesh items Abaqus CAE Usage Part module Shape Solid Extrude Select the face of an orphan mesh element as a sketching plane Shape Shell Extrude Select the face of an orphan mesh element as a sketching plane Mesh module Mesh Edit Category Mesh Associate mesh with geometry or Delete mesh associativity References Abaqus CAE User s Manual e Adding a solid feature Section 11 21 in the online HTML version of this manual e Adding a shell feature Section 11 22 in the online HTML version of this manual e Performing Boolean operations on part instances Section 13 6 e Bottom up meshing Section 17 11 e Mesh geometry association Section 17 12 12 3 MESHING e Assigning mesh controls Section 17 18 1 in the online HTML version of this manual e Manipulating nodes Section 64 1 1 12 3 Persistent display of seeds Product Abaqus CAE Benefits You can now display the seeds on a part or assembly throughout all meshing operations rather than just for seed definition and customization Description By default Abaqus CAE displays the seeds you have defined on a part or assembly only when yo
129. re supported on the following platforms e Windows x86 32 e Windows x86 64 e Linux x86 64 For current and complete details on supported Abaqus products and platforms including platform information for add on products interfaces and translators refer to the Abaqus systems information available through the Support page at www simulia com For more information see Appendix A System requirements of the Abaqus Installation and Licensing Guide Changes to licensing FLEXnet Licensing is upgraded to Version 11 6 1 in this release Abaqus 6 12 also adds the capability of using Dassault Systemes licensing instead of FLEXnet network licensing Depending on which type of license file you receive from your DS SIMULIA sales representative you can install and use either the Dassault Syst mes license server DSLS or the FLEXnet license server for INTRODUCTION TO Abaqus 6 12 use with Abaqus For details about installing the Dassault Systemes license server see Dassault Systemes license server installation Section 2 1 2 of the Abaqus Installation and Licensing Guide Changes to documentation e The Getting Started with Abaqus Interactive Edition manual now includes a tutorial for advanced Abaqus users that illustrates how you can use Abaqus CFD to model fluid flow through a bent tube and how you can use Abaqus Standard to model structural deformation in the tube e You can now quickly access the instructions to find keyword ex
130. refore mechanical loads are not available in the load editor when you specify the electromagnetic model type Once a model database is created you cannot change the model type Figure 3 1 shows the new model type selection available in the Start Session dialog box The new electromagnetic part type and section are available only in electromagnetic models Electromagnetic parts are used to define the domain for an eddy current analysis You can define a three dimensional extruded revolved or swept part or a two dimensional planar shell part Electromagnetic sections are used to define the properties of an electromagnetic part including assigning material properties 3 1 MODELING Start Session Create Model Database B eos With Electromagnetic Model Open Database 3 Run Script W Start Tutorial Figure 3 1 Model type selection in the Start Session dialog box Abaqus CAE Usage All modules Start Session With Electromagnetic Model Model Create Model type Electromagnetic Part module Part Create Type Electromagnetic Property module Section Create Category Solid Type Electromagnetic Solid References Abaqus CAE User s Manual e Creating anew model database Section 9 7 1 in the online HTML version of this manual e Part types Section 11 4 2 e Defining sections Section 12 2 3 3 2 SIMULIA Associative Interface for Abaqus CAE Product Abaqus CAE Benefits The SIMULIA Associati
131. release rates Use the new UNSTABLE GROWTH TOLERANCE parameter to specify the tolerance within which the unstable crack propagation criterion must be satisfied for multiple nodes at and ahead of the crack tip to be allowed to debond without the cut back of increment size in one increment when the VCCT criterion is satisfied for an unstable crack problem MAGNETIC PERMEABILITY Use the new NONLINEAR parameter to define nonlinear magnetic behavior of an electromagnetic medium MAGNETOSTATIC Magnetostatic response due to a known distribution of direct current MASS The ALPHA parameter is now supported in Abaqus Explicit to define mass proportional damping Use the new TYPE parameter to specify the point mass as isotropic or anisotropic Use the new ORIENTATION parameter to prescribe the principal directions of the anisotropic mass tensor MATRIX ASSEMBLE Use the new NSET parameter to remap matrix nodes MATRIX GENERATE Use the new PUBLIC NODES parameter to specify which nodes will be visible at the usage model 17 4 mod C mod E new S mod C mod E mod E mod E mod S mod C SUMMARY OF CHANGES MOMENTUM EQUATION SOLVER A new value is available for the TYPE parameter Set TYPE ILUFGMRES to enable the Incomplete LU factorization preconditioned Flexible Generalized Minimum Residual linear solver The numbers of restart vectors can now be specified on the data line MULLINS EFFECT The
132. rmines the increase in height of each successive layer inward from the walls e The number of wedge element layers Once you complete this information Abaqus CAE calculates and displays the total thickness of the boundary layer that will be created You can select Inactive faces model faces that should not include the boundary layer such as faces that represent inlets outlets and symmetric model constraints and you can choose to create a set containing the boundary elements Figure 12 5 shows the settings in the Boundary Layer dialog box and a detail of a pipe intersection model meshed with the selected parameters The pipe end shown was selected as an inactive face so the boundary layer is shown Abaqus CAE Usage Mesh module Mesh Controls Element shape Tet toggle on Insert boundary layer and click Assign Controls Reference Abaqus CAE User s Manual e Adding layers of wedge elements to tetrahedral mesh boundaries Section 17 18 12 in the online HTML version of this manual 12 8 MESHING Boundary Layer Sizing Controls Wall element height 0 1 Growth factor 1 2 E Number of layers Boundary layer thickness 1 29159 M Inactive Faces I Inactive faces O Edit M Set Creation J Create set with name BoundaryLayerElements 1 Cancel Figure 12 5 The Boundary Layer dialog box and resulting mesh layers 12 9 Mesh retention during feature
133. rphan mesh faces as a sketch plane for more information see Combining orphan and native mesh features in a model Section 12 2 Abaqus CAE Usage Part module Tools Geometry Edit Face From element faces References Abaqus CAE User s Manual e Using the limiting angle layer and analytic methods to select multiple element faces Section 6 2 6 e Creating a part from orphan elements Section 69 5 e Create face from element faces Section 69 7 10 in the online HTML version of this manual 3 10 MODELING 3 9 Exporting contour plot data to 3D XML Product Abaqus CAE Benefits When exporting contour plot data in Abaqus CAE to 3D XML format files texture mapping is now used instead of tessellation which reduces the size of the exported file Description When you export three dimensional model images of contour plots from Abaqus CAE in 3D XML format contour values are rendered using texture mapping Texture mapping is a high performance rendering method that essentially lays an image of the contour values the texture over an image of the model Tessellation is a method of transforming arbitrary contour values into repeating patterns of distinct shapes such as triangles or simple polygons the shape values are computed face by face For overlay plots contour values are rendered using tessellation Abaqus CAE Usage All modules File Export 3DXML Reference Abaqus CAE User s Manual e
134. s respectively The functions gr t and k t represent the dimensionless shear and normal relaxation moduli respectively Shear relaxation is supposed to be isotropic and independent on the direction of shearing See Defining viscoelastic behavior for traction separation elasticity in Abaqus Explicit in Time domain viscoelasticity Section 22 7 1 of the Abaqus Analysis User s Manual for additional details Time domain viscoelasticity can also be used in combination with the models for progressive damage and failure available for cohesive elements with traction separation behavior Defining the constitutive response of cohesive elements using a traction separation description Section 32 5 6 of the Abaqus Analysis User s MATERIALS Manual This combination allows modeling rate dependent behavior both during the initial elastic response prior to damage initiation as well as during damage progression Abaqus CAE Usage Property module Material editor Mechanical Elasticity Viscoelastic Domain Time References Abaqus Analysis User s Manual e Defining viscoelastic behavior for traction separation elasticity in Abaqus Explicit in Time domain viscoelasticity Section 22 7 1 e Modeling rate dependent traction separation behavior in Abaqus Explicit in Defining the constitutive response of cohesive elements using a traction separation description Section 32 5 6 Abaqus CAE User s Manual e
135. s developed in Abaqus CFD thereby increasing the coverage of the product functionality Description The following shear rate dependent non Newtonian models have been implemented in Abaqus CFD e Carreau Yasuda viscous shear behavior e Cross viscous shear behavior MATERIALS e Ellis Meter viscous shear behavior e Herschel Bulkley viscous shear behavior e Powell Eyring viscous shear behavior e Power law viscous shear behavior e Non Newtonian viscous shear behavior in tabular form References Abaqus Analysis User s Manual e Viscosity Section 26 1 4 Abaqus Keywords Reference Manual e VISCOSITY 6 5 Enhancements to Mullins effect in Abaqus Explicit Products Abaqus Explicit Abaqus CAE Benefits You can now define the damage behavior associated with Mullins effect stress softening of certain filled elastomers in Abaqus Explicit with the new user subroutine VUMULLINS Description User subroutine VUMULLINS is now available in Abaqus Explicit to define the damage behavior associated with Mullins effect in rubberlike materials and elastomeric foams This feature provides functionality equivalent to that of user subroutine UMULLINS previously available in Abaqus Standard The subroutine provides users with access to solution dependent state variables as well as temperature and field variables In addition to defining the damage variable you can also define the strain energy dissipation due to damage as well as a criteri
136. s products The output database is a neutral binary file Therefore results from an Abaqus analysis run on any platform can be viewed on any other platform supporting Abaqus Viewer It provides deformed configuration contour vector and X Y plots as well as animation of results Add on analysis Abaqus Aqua This add on analysis capability for Abaqus Standard and Abaqus Explicit provides a capability for calculating drag and buoyancy loads based on steady current wave and wind effects for 5 INTRODUCTION TO Abaqus 6 12 modeling offshore piping and floating platform structures Abaqus Aqua is applicable for structures that can be idealized using line elements including beam pipe and truss elements e Abaqus Design This add on analysis capability for Abaqus Standard allows the user to perform design sensitivity analysis DSA The derivatives of output variables are calculated with respect to specified design parameters e Abaqus Topology Optimization Module This capability is available in Abaqus CAE to perform shape and topology optimization This functionality requires an additional license to submit an optimization process for analysis e Abaqus Foundation This analysis option offers more efficient access to the linear static and dynamic analysis functionality in Abaqus Standard e CZone for Abaqus This add on capability for Abaqus Explicit provides access to a state of the art methodology for crush simulation based on CZone
137. selection easier and clearer when you perform operations that highlight the entire mesh part such as mesh verification Description When you select an entire mesh part from the viewport Abaqus CAE highlights only the exterior edges of the part by default rather than the edges of all of its elements The contrast in highlight behavior is shown in Figure 12 4 12 6 MESHING Figure 12 4 The previous default highlighting behavior left and the current default highlight behavior right for mesh parts Abaqus CAE Usage Part module View Part Display Options mesh edge visibility options Assembly module View Assembly Display Options mesh edge visibility options Reference Abaqus CAE User s Manual e Controlling edge visibility Section 76 3 12 7 Node and element numbering in flattened input files Product Abaqus CAE Benefits Abaqus CAE is now able to preserve the intended numbering of nodes and elements when you create an input file that does not use parts and assemblies even if some conflicts exist in the assembly Description When you create a flattened input file Abaqus CAE checks for conflicts in the node and element numbering In previous releases any conflicts would cause all nodes or elements in the model to be renumbered Now Abaqus CAE renumbers nodes and elements for only the part instances involved in the conflict All other nodes and elements retain their intended numbering Abaqus CAE Usage A
138. splay group You must pay attention to object dependencies when you save session objects and options to a file For example a free body cut may refer to a previously defined display group so it would make sense to save both display groups and free body cuts if you want to retain the free body cut in the future Likewise if you want to save the list of active view cuts and free body cuts to a file you should also save the view cuts and free body cuts themselves You must pay attention to object dependencies when you save session objects to a file For example if a free body cut refers to a previously defined display group you must save both free body cuts and display groups for that free body cut to be available in subsequent sessions GENERAL ENHANCEMENTS Abaqus CAE Usage All modules File Save Session Objects File Load Session Objects Reference Abaqus CAE User s Manual e Managing session objects and session options Section 9 9 in the online HTML version of this manual 2 4 Boolean operations on sets and surfaces Product Abaqus CAE Benefits You can now use several Boolean operations to create new sets or surfaces from existing ones Description You can create a new set or surface by performing the following Boolean operations on sets or surfaces that you select from the Model Tree e Union creates a new object with the entire contents of your selections it replaces the Merge operation that was available in pre
139. t Expanded object coverage for definition of custom kernel data Descriptive header in the journal file Abaqus PDE improvements Skipping the last command during session recovery Section 16 5 Section 16 6 Section 16 7 Section 16 8 Section 16 9 Section 16 10 PRODUCT INDEX Faster tab completion Selected errors now classified as an AbaqusExceptionType Better control over writing messages to the journal file Reformatting commands in Python files with proper indentation Improved message handling and reporting of plug ins Stop button for scripts Abaqus Viewer Section 2 2 Section 3 7 Queuing sessions running interactively Viewing model database attributes in the Visualization module Abaqus AMS Section 5 1 Substructure generation using the AMS eigensolver About SIMULIA SIMULIA is the Dassault Systemes brand that delivers a scalable portfolio of Realistic Simulation solutions including the Abaqus product suite for Unified Finite Element Analysis multiphysics solutions for insight into challenging engineering problems and lifecycle management solutions for managing simulation data processes and intellectual property By building on established technology respected quality and superior customer service SIMULIA makes realistic simulation an integral business practice that improves product performance reduces physical prototypes and drives innovation Headquartered in Providence RI USA with R amp D centers in Providenc
140. t pressure load from the CONWEP model on element faces new S SINKTEMP Reference sink temperature on element faces Nodal variables new S CDISPETOS Contact opening COPENETOS and relative tangential motions CSLIPETOS for edge to surface contact constraints new S CSTRESSETOS Contact pressure CPRESSETOS and frictional shear stresses CSHEARETOS due to edge to surface contact constraints new E NVF Nodal volume fraction new C SHEARRATE Shear rate at the nodes computed using the second invariant of the rate of strain tensor new E TIEADJUST Position adjustment vector components of the tied slave nodes 17 8 SUMMARY OF CHANGES new E TIEDSTATUS Status of the tied slave nodes Whole and partial model variables new C ALLKE Kinetic energy new S CRPTIME Creep time which is equal to the total time in procedures with time dependent material behavior new C VOL Current volume of the entire set or the entire model 17 9 PRODUCT INDEX Product Index Abaqus Standard Section 2 1 Performance improvements for batch preprocessing and initialization Section 3 1 Modeling enhancements for electromagnetic analyses Section 4 3 Time harmonic electromagnetic analysis in Abaqus CAE Section 4 4 Coupled thermal electrical structural analysis in Abaqus CAE Section 4 5 Magnetostatic analysis in Abaqus Standard Section 4 6 Transient eddy current analysis in Abaqus Standard Section 5 1 Substructure gene
141. t user control of the incrementation through the step Use the new STABILIZATION parameter to stabilize the solution when the overall system of equations may be ill conditioned Use the new TRANSIENT parameter to carry out a transient eddy current analysis ENERGY OUTPUT This option is now available in Abaqus CFD analyses ENRICHMENT ACTIVATION A new value is available for the ACTIVATE parameter Set ACTIVATE AUTO OFF to deactivate the enriched feature automatically once all the pre existing cracks or if there are no pre existing cracks all the allowable newly nucleated cracks have propagated through the boundary of the given enriched feature within the step 17 3 5 SUMMARY OF CHANGES mod C new C mod S E mod S new S mod S E mod S mod S FLUID BOUNDARY Use the new boundary condition type PASSIVEOUTFLOW to specify the passive outflow Use the new boundary condition type PVDEP to specify pressure boundary conditions that vary with the total volume of fluid crossing a surface Use the new DISTRIBUTION parameter to define a distribution used in conjunction with the PVDEP boundary type FLUID SECTION Specify element properties for fluid and porous media elements FRACTURE CRITERION A new value is available for the TYPE parameter Set TYPE ENHANCED VCCT to use the enhanced VCCT criterion in which the onset and growth of a crack can be controlled by two different critical fracture energy
142. technology from Engenuity Ltd Targeted toward the design of composite components and assemblies CZone for Abaqus provides for inclusion of material crush behavior in simulations of composite structures subjected to impact Optional analysis functionality e Abaqus AMS This add on analysis capability for Abaqus Standard allows the user to select the automatic multi level substructuring AMS eigensolver when performing a natural frequency extraction e Co simulation with MpCCI This add on analysis capability for Abaqus can be used to solve multiphysics problems by coupling Abaqus with any third party analysis program that supports the MpCCl interface e Co simulation with MADYMO This add on analysis capability for Abaqus Explicit can be used to perform vehicle occupant crash safety simulations by coupling Abaqus Explicit with MADYMO Interfaces e Abaqus Interface for Moldflow This optional interface translates finite element model information from a Moldflow analysis to an Abaqus input file e Abaqus Interface for MSC ADAMS This optional interface allows Abaqus finite element models to be included as flexible components within the MSC ADAMS family of products The interface is based on the component mode synthesis formulation of ADAMS Flex Specifically flexibility data from Abaqus superelements are translated to the modal neutral mn file format required by the ADAMS Flex product Although the ADAMS Flex interface supports only lin
143. ted directly into Abaqus CAE SolidWorks Associative Interface This add on capability for Abaqus CAE creates a connection between a SolidWorks session and an Abaqus CAE session This connection can be used to transfer model information from SolidWorks to Abaqus CAE Subsequent modifications to the model in SolidWorks can be propagated to the Abaqus CAE model while retaining any analysis features such as loads or boundary conditions that were defined on the model in Abaqus CAE Pro ENGINEER Associative Interface This add on capability for Abaqus CAE creates a connection between a Pro ENGINEER session and an Abaqus CAE session This connection can be used to transfer model information between Pro ENGINEER and Abaqus CAE Modifications to the model in Pro ENGINEER can be propagated to the Abaqus CAE model without affecting any analysis features such as loads or boundary conditions that were defined on the model in Abaqus CAE and certain geometric modifications can be made in Abaqus CAE and propagated to the model in Pro ENGINEER Abaqus CAE Associative Interface for NX This add on capability for Abaqus CAE creates a connection between an NX session and an Abaqus CAE session This connection can be used to transfer model data and to propagate design changes between NX and Abaqus CAE The Abaqus CAE Associative Interface for NX can be purchased and downloaded from Elysium Inc www elysiuminc com Geometry Translator for CATIA V4 This add on ca
144. terial models or changes to existing material models It provides an overview of the following enhancements e Material calibration for hyperelasticity with permanent set Section 6 1 e Material models for electromagnetic problems in Abaqus CAE Section 6 2 e New electrical magnetic material behavior category in material editor Section 6 3 e Non Newtonian viscosity in Abaqus CFD Section 6 4 e Enhancements to Mullins effect in Abaqus Explicit Section 6 5 e Viscoelasticity for cohesive elements with traction separation behavior in Abaqus Explicit Section 6 6 e Rayleigh damping enhancement in Abaqus Explicit Section 6 7 e Parallel network viscoelastic model Section 6 8 e Ductile damage initiation criterion enhancements in Abaqus Explicit Section 6 9 e Enhancements to creep models Section 6 10 e Nonlinear magnetic behavior Section 6 11 6 1 Material calibration for hyperelasticity with permanent set Product Abaqus CAE Benefits You can now derive hyperelasticity plasticity and Mullins effect material behaviors from uniaxial and biaxial loading data sets in Abaqus CAE and add these behaviors to a material definition This enhancement enables you to include more realistic material models of elastomers and thermoplastics in your analysis Description Abaqus CAE now includes a third material calibration behavior Hyperelasticity with permanent set that enables you to
145. ther than the global coordinate system Abaqus CAE transforms these values and applies them in the global coordinate system The CSYS option available in the Edit Boundary Condition dialog box shown in Figure 8 3 allows you to do the following e Select an existing datum coordinate system in the viewport e Select an existing datum coordinate system by name e Create a new datum coordinate system Abaqus CAE Usage Load module Create Boundary Condition Category Fluid Types Fluid inlet outlet or Fluid wall condition specify velocity boundary conditions CSYS select rectangular coordinate system enter V1 V2 and V3 PRESCRIBED CONDITIONS Edit Boundary Condition Name BC 1 Type Fluid inlet outlet Step Step 1 Flow Region Picked KS Momentum Thermal Energy Turbulence IV Specify Pressure Velocity csys Global gt A Distribution uniform x fix Bo Ben raf Amplitude instantaneous Ay Figure 8 3 CSYS option available for fluid inlet outlet velocity boundary conditions References Abaqus CAE User s Manual e Defining a fluid inlet outlet boundary condition Section 16 10 11 in the online HTML version of this manual e Defining a fluid wall boundary condition Section 16 10 12 in the online HTML version of this manual 8 4 Enhancements to distributed body heat flux Products Abaqus CFD Abaqus CAE Benefits Nonuniform distributed body fluxes c
146. thing can be defined on the surfaces of the inner and outer races that contact the balls Abaqus CAE Usage Interaction module General contact interaction editor Surface Properties Surface smoothing assignments Edit Select the surface click the arrows to transfer the surface to the list of smoothing assignments In the Smoothing Option column select REVOLUTION to apply circumferential smoothing select SPHERICAL to apply spherical smoothing or select NONE to prevent smoothing of the surface References Abaqus Analysis User s Manual e Defining general contact interactions in Abaqus Explicit Section 35 4 1 10 11 INTERACTIONS Figure 10 10 Ball bearing with surface smoothing e Assigning surface properties for general contact in Abaqus Explicit Section 35 4 2 e Smoothing contact surfaces in Abaqus Standard Section 37 1 3 Abaqus CAE User s Manual e Specifying surface property assignments for general contact Section 15 13 5 Abaqus Keywords Reference Manual e CONTACT e CONTACT PAIR e SURFACE PROPERTY ASSIGNMENT e SURFACE SMOOTHING 10 6 Eulerian Lagrangian thermal contact Products Abaqus Explicit Abaqus CAE Benefits You can now model thermal interactions with Eulerian Lagrangian contact Description Thermal interaction properties are now supported with Eulerian Lagrangian contact in Abaqus Explicit when using coupled temperature displacement Eulerian element EC3D8RT in a dynam
147. to simply enter the total magnitude of flux applied over the surface In previous releases using the uniform distribution option it was necessary to query the faces of the surface to find the total area and then divide the total flux by the surface area With the new total flux option you can simply enter the total magnitude of flux applied over the entire surface Description When modeling surface heat flux you usually know the total flux that will be applied to a face or surface of the model In previous releases of Abaqus CAE this number had to be divided by the surface area before entering it into the Magnitude field of the Edit Load dialog box using the existing Uniform option for Distribution Now with the Total Flux option shown in Figure 8 5 you can directly enter the total magnitude of the flux Abaqus CAE Usage Load module Create Load Category Thermal Types Surface heat flux select surfaces Distribution Total Flux Reference Abaqus CAE User s Manual e Defining a surface heat flux Section 16 9 17 in the online HTML version of this manual 5 PRESCRIBED CONDITIONS CE ee Name Surface_Heat_Flux Type Surface heat flux Step Step 1 Heat transfer Region Picked Distribution Total Flux E fix Magnitude Uniform User defined Amplitude EMAI OK Cancel Figure 8 5 Total flux distribution option for surface heat flux 8 13 Defining connector loads and boun
148. tory e Section e Step Reference Abaqus Scripting User s Manual e Storing custom data in the model database or in other objects Section 5 6 1 16 2 Descriptive header in the journal file Products Abaqus Standard Abaqus Explicit Abaqus CAE Benefits The journal file now includes a header section that provides the Abaqus version model database version and the date when the model database was last saved This information can be helpful when you recreate a saved model database Description The journal 3jn1 file contains the Abaqus CAE commands that will replicate the model database that was saved to disk This file now includes a header section that describes the following the Abaqus version model database version and the date when the model database was last saved Reference Abaqus Scripting User s Manual e Recreating a saved model database Section 9 5 2 16 3 Abaqus PDE improvements Product Abaqus CAE Benefits When you navigate to the file you want to open in the Abaqus PDE you can now specify its path using environment variables for faster navigation In addition search functionality uses a default setting of exact matches Description You can now navigate to the file you want to open in the Select File dialog box by specifying an environment variable in the File Name field In addition your searches of the main file now return matches that ignore case by default rather than returning only e
149. ts of force per area the edge to surface formulation also reports contact stresses in these units which results from dividing the contact force per edge length by a representative surface facet length Additional internal surfaces are generated to show which edges satisfy feature edge criteria for individual components These internal surfaces have the naming convention General_Contact_Edges_k where 10 4 INTERACTIONS Figure 10 4 Soft cloth falling on a shell frame deformed configurations k corresponds to an automatically assigned component number The same component numbers are assigned to internal surfaces showing surface faces General Contact Faces _k these surfaces used the naming convention General Contact _Component_k in prior versions Diagnostic messages for general contact refer to these internal surface names For example diagnostic messages related to contact status changes for the edge to surface formulation may refer to contact between nodes of General Contact Edges 2 and General Contact _Faces_1 Internal surfaces can be viewed using display groups in the Visualization module of Abaqus CAE Figure 10 5 shows an example with one of each type of internal component surface displayed As in prior versions internal surfaces showing all 10 5 INTERACTIONS Figure 10 5 Example with edge and face component surfaces in a display group faces General Contact _Faces and all edges General_Contact_Edges
150. u are defining or customizing the seed placement You can now toggle on persistent display of seeds so that they appear even when you are performing nonseeding related operations in the Mesh module The Show Mesh Seeds button is available on the Visible Objects toolbar shown in Figure 12 2 Figure 12 2 The Visible Objects toolbar with the Show Mesh Seeds button selected Abaqus CAE Usage Mesh module Visible Objects toolbar click ee References Abaqus CAE User s Manual e Components of the toolbars Section 2 2 3 e What are mesh seeds Section 17 4 1 12 4 Enhanced node editing functionality Product Abaqus CAE Benefits You can now undo or redo changes to node positions directly from the Edit Nodes dialog box In addition you can now select the new locations for the nodes you want to move directly from the viewport These enhancements streamline the process of editing nodes in a part or assembly Description The Edit Nodes dialog box now includes undo and redo functionality that enable you to undo or redo the changes you make to nodes in a part or assembly The Undo options are available from the bottom portion of the Edit Nodes dialog box shown in Figure 12 3 12 4 MESHING l4 Edit Nodes x Specification method CSYS Part CSYS Select te Offsets ier Coordinates fer Current coordinates 1 0 05 1 3 2 fo 0 714286 3 0 13 20 IV Project to geometry Undo a Undo Edit n
151. uct Abaqus CAE Benefits You can now define surface fluid cavity and fluid exchange interactions and their associated interaction properties in Abaqus CAE Description Surface fluid cavities are used to model fluid filled cavities such as tires and air springs for analysis You create a fluid cavity interaction by selecting a reference node cavity point and the surface that defines the outer boundary of the cavity You must assign a fluid cavity interaction property to complete the definition You can create either a hydraulic or pneumatic interaction property for the cavity Figure 10 1 shows the hydraulic and pneumatic entries for a fluid cavity interaction property The data for a hydraulic fluid cavity interaction property must include the fluid density Optional parameters include e Fluid bulk modulus required for Abaqus Explicit e Fluid expansion coefficients e Temperature dependent data for the fluid bulk modulus or the expansion coefficients e Field variables for the fluid bulk modulus or the expansion coefficients The data for a pneumatic fluid cavity interaction property must include the ideal gas molecular weight For an Abaqus Explicit analysis you can also specify molar heat capacity in the interaction property using either a five term polynomial form or a data table Fluid exchange interactions involve the movement of fluid between a cavity and the environment or between two cavities To define a fluid exchange interaction you
152. umber of items in your path Description In earlier Abaqus releases tab completion in the interactive Python interfaces was sometimes slow when the Python sys path included several network locations Abaqus 6 12 now provides a threaded directory search that offers faster performance even when you have a large number of network locations in your path Reference Abaqus Scripting User s Manual e Using tab completion to explore the object model Section 6 1 2 16 6 Selected errors now classified as an AbaqusExceptionType Benefits AbaqusException errors are now classified as an AbaqusExceptionType This classification provides a more descriptive grouping for errors Description The Python type of an AbaqusException has changed from MetaClassPrint to AbaqusExceptionType Reference Abaqus Scripting User s Manual e Error handling in the Abaqus Scripting Interface Section 5 5 16 7 Better control over writing messages to the journal file Benefits The Abaqus GUI Toolkit has been updated to enable you to control whether messages are written to the journal file Description The writeToJournal argument is now available for many methods in the Abaqus GUI Toolkit You can set this argument to True to write commands to the message file for the selected method In addition you can run the journalMethodCal11 function to record a command in the journal file This option is preferable to the use of the writeToJournal argu
153. ure dialog box Section 11 25 in the online HTML version of this manual e Bottom up meshing Section 17 11 12 10 EXECUTION 13 Execution This chapter discusses commands and utilities for running the Abaqus products It provides an overview of the following enhancements e Parallel execution of the element operations Section 13 1 e Parallel execution in the analysis input file processor Section 13 2 e Multiple GPGPUs supported in the direct sparse solver Section 13 3 e Translating LS DYNA input files to partial Abaqus input files Section 13 4 13 1 Parallel execution of the element operations Product Abaqus Standard Benefits The analysis time of certain procedures is reduced by parallel execution of the element operations Description Thread based parallel execution of the element operations is now supported for the following linear perturbation procedures e natural frequency extraction that uses the SIM architecture e modal linear dynamic analyses that use the SIM architecture e substructure generation and e matrix generation References Abaqus Analysis User s Manual e Parallel execution in Abaqus Standard Section 3 5 2 e Natural frequency extraction Section 6 3 5 e Complex eigenvalue extraction Section 6 3 6 e Transient modal dynamic analysis Section 6 3 7 e Mode based steady state dynamic analysis Section 6 3 8 e Subspace based steady st
154. ustrates the improved substructure generation performance This example includes an AMS frequency extraction step and the subsequent substructure generation step on a system with Intel Westmere processors and 128 GB physical memory for three industrial models Model 1 is an 10 million degree of freedom automotive body in white model with full substructure matrix recovery Model 2 is a 9 6 million degree of freedom automotive vehicle body model with full substructure matrix recovery and Model 3 is a 13 million degree of freedom powertrain model with no substructure matrix recovery In the table w o NSET indicates full eigenmodes recovery in the AMS frequency extraction step and w NSET 5 1 ANALYSIS TECHNIQUES indicates selective recovery of the eigenmodes at the user specified node set in the AMS frequency extraction step Table 5 1 Performance improvement of the substructure generation procedure due to the new substructure generation capability of the AMS eigensolver Number Abaqus 6 11 Abaqus 6 12 Degrees of 16 core 16 core Model of Retained Number Wall Clock Number Wall Clock Wall Clock Freedom Degrees of Time of Time Time Millions of Modes W O NSET Modes w o NSET w NSET Freedom h mm h mm h mm Model 10 0 336 554 2 05 555 0 43 N A 1 Model 9 6 36 1317 3 00 1317 1 25 N A 2 Model 13 0 1188 955 17 39 955 3 55 1 45 3 In Abaqus 6 11 full eigenmode recovery in t
155. ve Interface for Abaqus CAE allows you to easily transfer an assembly from CATIA V6 to Abaqus CAE you can subsequently modify the model in CATIA V6 and propagate these modifications to Abaqus CAE without losing any analysis features assigned to the model in Abaqus CAE 3 2 MODELING Description When you use the SIMULIA Associative Interface for Abaqus CAE to transfer the geometry of a model from CATIA V6 to Abaqus CAE the model appears in the current Abaqus CAE viewport as shown in Figure 3 2 Abaqus CAE Figure 3 2 Exporting a model from CATIA V6 to Abaqus CAE using the associative interface The parts and part instances from CATIA V6 are stored in the Abaqus CAE model database and appear in the Model Tree You can use CATIA V6 to modify the parts or to change the position of instances in the assembly When you subsequently import the model into Abaqus CAE the Abaqus CAE model is updated to reflect the changes In addition associative import retains any features that you added to the model with Abaqus CAE Any of the features that you created in Abaqus CAE such as partitions loads boundary conditions sets and surfaces are regenerated each time you import the modified model from CATIA V6 You can also save the geometry of your CATIA V6 model in an assembly file eaf format that you can manually import into an Abaqus CAE assembly Abaqus CAE Usage Assembly module Tools CAD Interfaces CATIA V6 File Import Assembly
156. vious releases e Intersection creates a new object from the items that are common to all of the selected sets or surfaces e Difference subtracts sets or surfaces from one that you designate as the First Figure 2 3 shows the Boolean controls dialog box for a selection of sets from the Model Tree The Surfaces Boolean dialog box contains identical controls for use with surfaces sets Boolean eS New set name Set 4 Operation C Union Intersection First set set 3 Cancel Figure 2 3 The Boolean dialog box for sets GENERAL ENHANCEMENTS Abaqus CAE Usage All modules Select multiple sets or surfaces from the Model Tree then click mouse button 3 and select the Boolean option from the menu Reference Abaqus CAE User s Manual e Performing Boolean operations on sets or surfaces Section 73 3 4 in the online HTML version of this manual 2 5 Consistency of objects during instance merging operations Product Abaqus CAE Benefits Several enhancements have been made to sets and surfaces resulting in consistent application of loads boundary conditions and section assignments between geometry and mesh parts Skin and stringer reinforcements are also maintained Description Merge operations for geometry objects have always preserved loads boundary conditions and section assignments Now when you merge mesh objects or create mesh parts Abaqus CAE copies modifies or oth
157. xact matches 16 2 Abaqus SCRIPTING INTERFACE References Abaqus Scripting User s Manual e Managing files in the Abaqus PDE Section 7 2 2 e Editing files in the Abaqus PDE Section 7 2 3 16 4 Skipping the last command during session recovery Product Abaqus CAE Benefits You can now skip the most recent command in the recovery file when you perform a crash recovery This enhancement is useful if you suspect that the final command might have caused your session to terminate Description Figure 16 1 shows the crash recovery dialog box that appears when you reopen Abaqus CAE after a session termination This dialog box now enables you to recover all of the changes recorded in the abaqusn rec file except for the most recent command l hbagus cae S 4 crash recovery File was Found Recover changes Do not recover changes C Recovery file belongs to another current session ox Figure 16 1 Skipping the most recent command during crash recovery Abaqus CAE Usage All modules Crash recovery dialog box Recover changes Do not execute the last command Reference Abaqus CAE User s Manual e Recreating an unsaved model database Section 9 5 3 16 3 Abaqus SCRIPTING INTERFACE 16 5 Faster tab completion Product Abaqus CAE Benefits The interactive Python interfaces in Abaqus CAE and the Abaqus PDE now provide faster tab completion performance when you have a large n
158. y current analysis Section 6 7 5 e Magnetostatic analysis Section 6 7 6 eo e Magnetic permeability Section 26 5 3 Abaqus Keywords Reference Manual e MAGNETIC PERMEABILITY e NONLINEAR BH ELEMENTS 7 Elements This chapter discusses elements available in Abaqus It provides an overview of the following enhancements e Support for electromagnetic elements in Abaqus CAE Section 7 1 e Unsymmetric storage for linear coupled stiffness and viscous damping for connections in Abaqus Standard Section 7 2 e Thick walled pipe elements in Abaqus Standard Section 7 3 e Defining the anisotropic mass tensor Section 7 4 7 1 Support for electromagnetic elements in Abaqus CAE Products Abaqus Standard Abaqus CAE Benefits You can now assign element types from the electromagnetic family of elements to a solid region of your model in Abaqus CAE This enhancement provides improved interactive meshing for the domain in an electromagnetic analysis Description The Element Type dialog box in the Mesh module now enables you to assign element types from the electromagnetic family of elements to solid topologies in your model The electromagnetic family of Abaqus Standard elements includes element types EMC2D3 EMC2D4 EMC3D4 and EMC3D8 Abaqus CAE Usage Mesh module Mesh Element Type Family Electromagnetic References Abaqus Analysis User s Manual e Two dimensional solid element
159. y see whether you are improving poor elements or at least make certain that you are not creating more poor elements by moving the node By default mesh nodes are constrained to the geometry with which they are associated a dragged surface node must stay on the original surface an edge node must stay on the edge and a node associated with a vertex cannot be dragged However if you toggle off Project to geometry in the prompt area you can drag nodes to any location in a plane parallel to the screen and passing through the starting location of the node Interior nodes are not constrained to geometry therefore they are always moved in a plane parallel to the screen You can drag only one node at a time You can drag orphan or native mesh nodes on dependent or independent instances in an assembly Dragging nodes in a dependent part instance will change the part mesh and all instances of the part Abaqus CAE Usage Mesh module Edit Mesh dialog box Category Node Method Drag toggle Project to geometry in the prompt area click and hold mouse button 1 to drag a node to a new location Reference Abaqus CAE User s Manual e Dragging nodes Section 64 5 3 in the online HTML version of this manual 12 6 Improved display for selection of mesh parts Product Abaqus CAE Benefits Abaqus CAE now highlights only the exterior edges of a mesh part when you select the entire mesh part in the viewport This enhancement makes mesh part
160. ysis User s Manual e Abaqus Standard Abaqus Explicit and Abaqus CFD execution Section 3 2 2 e Using the Abaqus environment settings Section 3 3 1 e Parallel execution overview Section 3 5 1 e Parallel execution in Abaqus Standard Section 3 5 2 Abaqus Installation and Licensing Guide e Chapter 4 Customizing the Abaqus environment 13 2 EXECUTION 13 4 Translating LS DYNA input files to partial Abaqus input files Product Abaqus Explicit Benefits You can now translate an LS DYNA keyword file to a partial Abaqus input file Description The new abaqus fromdyna execution procedure enables you to convert an LS DYNA analysis model to an Abaqus equivalent Reference Abaqus Analysis User s Manual e Translating LS DYNA data files to Abaqus input files Section 3 2 30 13 3 OUTPUT AND VISUALIZATION 14 Output and visualization This chapter discusses obtaining postprocessing and visualizing results from Abaqus analyses It provides an overview of the following enhancements e Requesting field output on exterior nodes and elements in Abaqus CAE Section 14 1 e Displaying multiple slices of view cut data Section 14 2 e Enhancements to free body display Section 14 3 e Editing free body cuts Section 14 4 e Selecting elements by topology in the Visualization module Section 14 5 e Enhancement to material orientation plot display Section 14 6 e

Abaqus Release Notes

Contents

Download Pdf Manuals

Related Search

Related Contents