MSDTool : Requirements Document - Computer Science
Contents
1. All operations that involve mutable operations upon the database are loggable at the behest of the system administrator 33 4 Glossary Glossary API Authentication Tokens Data Ingress database persona LDAP Microstructure Nanoindentation Orientation Imaging Microscopy OIM Raman Spectroscopy System Administrator Application Program Interface The system pro vides a public software interface through which one may interact with an existing software arti fact and extend it 29 A device either virtual or physical that permit the system to distinguish different users and re strict unauthorized use 31 The process of obtaining data into the system from the three different microstructural analysis techniques 4 Descriptions that are given different modes of database use 29 Light Weight Directory Access Protocol 31 The observed structure of a metal or an alloy after the processes of etching and polishing under a high degree of magnification 2 An destructive mechanical structure analysis technique whereby an indenter collects load dis placement values on geometries on the order of lnm 4 OIM determines the crystallographic orientation information about a sample material 4 A spectroscopic technique used in condensed matter physics and chemistry to study the vibra tional rotational and other low frequency modes in a system This technique determines the chem ical composition of mater2. 26 ple a ha tae ATA a de A 27 SCS arm Ge a Me foran amp he oF e ts dns ae be 28 29 1 Introduction MSDTool is a computer aided engineering CAE framework and application for materials science and engineering The application aids material designers in answering quantitative problems commonly posed while investigating new materials that formerly were done with individual programs and spread sheets This application is supported by an extensible framework of algorithms that derive values of physical properties from descriptions of microstructure 1 1 Background Microstructure Hull Design ot A ee 2 as Cote Property Closure Figure 1 Summary Image The Mechanics of Microstructure MMG group at Drexel University along with collaborators at Brigham Young University BYU have developed a corpus of techniques for aiding engineers in the process of Microstructure Sensitive Design MSD MSD a term coined by these researchers is a new material design paradigm that provides a link between descriptions of material microstructures and their corresponding physical properties Additionally mathematical techniques are currently being researched which will model the effects that manufacturing processes have on microstructure and their properties The MMG s research has produced a number of such MSD techniques for particular material classes and properties of interest The rigorous mathematical framework and the theory on
3. E 2 4 7 Select Point Set Window d6 A4200 un Peg ed ZAG Edit Pont Set Wingew 2 y fa sw fran aa ae te es 24 0 gt Add Point Set Windows una ee re ee a a LE et we ee SOA 2 4 10 Non Logged in Mode Menus 2411 Logged in Mode Menus 2 22 22222 EAS BRD ES YD set b 3 Dy e Databaser medie 4i dle le he Sle ee ae a ala oss ahh a ne a a SOU LS BR NON NW 0 III II IS 2 5 1 Database Personas 2 5 2 Material Closures 3 Non Functional Requirements 3 Documentation Ten op Re eue a A A Getta CA R ae 3 11 ser Manual s Sa RS fe Ste ew Gut Hh og RS Se Be ee ver 341 2 DES En Document ue LR MR Um Seca O x4 SED RAR Sibi API Reference sly al Ge SE Bae GES DS BER SEE A A 4202 A SA Matando A EN A ee a A 3 2 Minimal Hardware Recommendatons SNA PAOLA a Bees Gow AP AN nee ee ne 3 4 Decoupling Algorithms from Problems 3 4 1 Unit Tests for Algorithms A PP een EB 3 5 Run time Speed and Expectations o o oaoa ee eee pee ie ee 3 6 Network Interoperability is oaoa a 3 6 1 Properties Framework 2 522 24228 22 228 a a a 3 0 2 CETIOSUTES A 2 5 ic s n d l e a a a Hee a Thy v re a pre a eee G 3 6 3 INteraclive za gone bee Rg ee ee ae a A aa ee 3 7 System Administration Requirements 4 24 222 bu dal a 5 71 Authentication th oa DARTE DS em Re ire 3 132 Addins ISCH See RS
4. five hours of trailing to learn how to expertly administer 3 2 Minimal Hardware Recommendations The minimal hardware configuration recommendations inherit from the minimal hardware configuration recommendations NET framework on a Windows XP machine with Service Pack 2 3 3 Software Platform MSDTool inherits the minimal set of existing software required by using the NET software framework 3 4 Decoupling Algorithms from Problems Whereas the MMG defines the general class of algorithms as optimization routines that find a paths among high dimensional points that lie within the microstructure hull the system must not make any assumptions regarding the use of a given algorithm 3 4 1 Unit Tests for Algorithms Whereas the MMG defines the general class of algorithms as optimization routines that find a paths among high dimensional points that lie within the microstructure hull the system automatically validate the correctness of both existing and future algorithms that perform this task 3 5 Run time Speed and Expectations All algorithms considered for use in the system must run within no more than ten seconds 3 6 Network Interoperability Whereas researchers and practitioners perform materials science and engineering research cooperatively among research institutions the system facilitates the sharing of both 1 new algorithms and 2 new materials and whereas inter system networking allows this level of collaboration
5. i e Matlab Fortran C and Visual Basic This poses a direct challenge to both automation and as a consequence commercial viability Nevertheless the system outlined in the following sections solves this problem 3 Database The computation of property closures in many cases is computationally expensive The MMG group spends a great deal of research computing time calculating these closures only to store them in text files across a wide array of workstations in their lab They have expressed a desire to begin computing and storing these closures in a more efficient manner This atlas will have high commerical value 1 3 Data Ingress There are numerous sources of data that we synchronize and format before their use and apply mathe matical models developed by the MMG These data sources range from both commercial and in house 5 microstructure analysis tools In addition there is a database of physical constants and other needed precomputed parameters i e stiffness tensor coefficients Users import insertions into the application upon the collection of new measurement data The following sections detail the aforementioned data 1 3 1 Orientation Imaging Microscopy OIM Orientation Imaging Microscopy OIM is a commercial technique it measures the crystallographic ori entation of a sample material OIM involves scanning a across a sample in a regular grid and at each point performing a technique called Electron Backscatte
6. our system provides for network facilities for accomplishing both 1 and 2 32 3 6 1 Properties Framework MSDTool provides the ability through which new techniques may be added to the system as the MSD group other outside stakeholders and other third parties advance the development of new properties and analysis techniques that are answer design questions 3 6 2 Closures Whereas closures are generally computationally expensive to compute interactively the properties frame work permits the ability to populate material closures for new techniques as they are developed 3 6 3 Interactive Whereas some of the same feature extraction code needs to be run interactively the properties framework must allow for new techniques to be included in the interactive execution of the framework 3 7 System Administration Requirements 3 7 1 Authentication The system shall accept as authentication tokens a pair consisting of a user name and a password An internal i e by a user database inside the program or an external e g LDAP mechanism processes the users authentication authorization 3 7 2 Adding Users The system permits the adding of users to a local authentication database 3 7 3 Groups of Users The system permits the defining and modification of user groups to a local authentication database 3 7 4 Deleting Users The system permits the adding of users to a local authentication database 3 7 5 Logging and Auditing
7. space The axis drop down represents the view vector that from which the actually figure is generated so different axes produce different pole figures depending on the symmetry of the underlying crystals The Graph Type drop down can be used to view the pole figure in different ways e g stereographic or equal angle The Draw Flat check box can be used to make the 3D pole figure 2D or vise versa The Camera Control drop down allows the user to specify their mouse control Track Ball Rotate and Zoom The Frame Controls change the actual look of the pole figure rather than effecting the underlying data You can change the color gradients and remove contour lines with the Palette Frame and Smooth Palette check boxes Finally the Transparency scrollbar changes the pole figure from opaque to completely transparent When multiple pole figures are viewed simultaneously they will be viewed as intersecting planes in 3D and the Draw Flat option will be disabled EE MaterialViewer Graph Type is tereographic Height Controls C Draw Flat Camera Controls TrackBall Frame Control Contour v C Palette Frame Smooth Palette Transparency Figure 7 Pole Figure 14 2 4 4 Select Sample Window The Select Sample Window Figure 9 allows users to select a particular available sample for editing The window consists of a list of available samples describing them by their label the lab that created them the data they were modified and th
8. will be grayed out 30 Help Online documentation can be requested through the help menu Figure 21 2 5 Database The system provides 2 5 1 Database Personas To accommodate the ability to collaborate yet assure the ability for works in progress from being publicly accessible the following database personas are defined 1 Installation wide material databases The contents of known materials that all users use 2 Lab wide material databases Databases belonging to a particular lab wherein users share materials in a lab but not all system users may access the lab s material 3 Group Databases Databases owned by a given set of users The system assumes no among users in the group 4 Personal Databases Databases that are owned and accessible only by a single owner 2 5 2 Material Closures Each database persona may 1 add 2 remove and 3 modify both materials and properties about materials 3 Non Functional Requirements 3 1 Documentation The following subsections enumerate the software documentation artifacts that the system produces 3 1 1 User Manual MSDTool will produce a documentation artifact that describes the program use from the end user per sona 3 1 2 Design Document MSDTool will produce a document description of how MSDTool realized its requirements 31 3 1 3 API Reference An API to allow new algorithms to the system 3 1 4 Maintainability The system shall only require at most
9. AEM ae Rett RE Aie Ron D DC SN M CA AN he 31 3 Groups OF SETS aa A A A r AN A de 3 14 Deleting USSR sn ar ae Erbe voi Erle et De 3 1 3 Loggins and Auditing vr A me AT AT A AA a en 4 Glossary 5 Index List of Tables List of Figures 1 Summary A A a e n y h 2 A flow chart modeling the overall intended functionality of the MSD Tool application 3 Losine WOW fo a a ag OE a E d a e 00 40220 ra a Me 4 Eosin DNS ETOL tr ee ee e e e ete ee T y RN LC gt OST Server Eror eoe a ee A e sat esata ge Gat ee vo S fa ante ch a 6 Main Windows oS ee Ge ee ots d L n tee TN Soe feo ae Pe o Se ne ca 10 2 Sa d Y 7 EOIE EIE TC ode re se tte Tyree cake ere i ee er ERI ee ENTE E 8 File Meet Ba gda A A X40 OIR en 9 TEOIL Sample NIDO Was Sarge ee a fa ig tas ede a e a wR Se ty Ta 10 Edit Point Window vay si Soe oS oO AER Bae BE s0 Boe eR 11 Add Pont Window nissene es Te AS le eee run ti 12 Add Sample Window os citas na ds 2 20 0 A AAA s Ne 13 AM A A Bu Be 31 31 31 31 32 32 32 32 32 32 32 32 33 33 33 33 33 33 33 33 33 34 35 14 15 16 17 18 19 20 21 Pile Export and File Print Menus 24 02 sau Gee Qu ea np 22 Edit Menu Database Menu Database Menu Database Menu Database Menu Database Menu T c GE n6 c a a ee ea a ee c c c g c ra ee 23 MU SN dt RRE 24 Point Database LE ir a un Bere Dur Oa aR 25 PHI DDGTLIEE A c l Saare ue ee d p
10. MSDTool Requirements Document Sonal Gupta Joshua Shaffer David Turner and Mark Zuber sg385 jbs36 dmt36 mrz23 drexel edu February 9 2007 Contents 1 Introduction Lal Background o 2 as Xo ng rs nus ae ent a ng ed ek te 4 VD ETO a e RP eg A Pore LO al he Peat AL ly 1 3 Aba AWOL ESS g2 x b n co E v ng orks Bord ve does Ae rl SEL NS US Te er a oxy 1 3 1 Orientation Imaging Microscopy OIM 132 AMAR Spectroscopy Leo rn NE terres Sehen diet vui drehe a 1 3 3 Nano indentation Nano 2 Functional Requirements 2 1 Inplt Formale iria te A Oe eras E Be eae RATS eet Cs Bee Ge RE o 2 1 1 Fourier Coefficients ss oe SS RES ra aa lue 2 1 2 Formats Equivalent to Fourier Coefficlents 2 1 3 Formats Equivalent to Fourier Coefficients Interface 22 Overall Punctionality lt 3 EME 41d SA Su B aes oe MES Be u a 23 Core Alperihns 2 eds cd US Eee 2 3 1 Forward Processing Analysis 2 3 2 Reverse Processing Synthesis DA AE LU PRE h ca ca na acc e a ZA LOS cy g Bonde ee tee A 6 deen eek 242 Main Window 0 5 ee he rs es ds ca ee NE a 2 4 3 Pole Figure Viewer Window ou Ge Du My duc l t AR AAA AAA 2 4 4 Select Sample Window te EE RS AR te BT DNS NUE CS MONS ne 2 4 5 Edit Sample Window 203 8 0s at gr Bee 2 4 6 Add Sample Window u en ee ee ei Bes de c
11. abel Lab Date Property List Label Lab Date Property List World Permissions Ee ane rad Y Read Label Lab Date Property List Label Lab Date Property List Figure 9 Edit Sample Window 17 Edit Point Set Select Point Set Label Lab Date Property List Label Lab Date Property List Label Lab Date Property List Label Lab Date Property List Label Lab Date Property List Label Lab Date Property List Label Lab Date Property List Label Lab Date Property List Label Lab Date Property List Label Lab Date Property List Label Lab Date Property List E Figure 10 Edit Point Window 18 Add Point Set Information Data Permission Properties KurzLabel Fundamental Zone Description Aray description of Data Set Add Point Set Information Data User Permissions Y Read Group Permissions Y Read World Permissions Y Read Add Point Set ge em cum C3333 C1212 _New Analysis Technique 1 K1313 Y New Analysis Technique IT aly Figure 11 Add Point Window Add Sample Add Sample Information Data Permission KurzLabel Fundamental Zone Description rttray description of Data Set v Add Sample User Permissions M Read Group Permissions Y Read World Permissions Y Read Figure 12 Add Sample Window 20 Import Personal Material Datab
12. ase XML Figure 13 File Import Menu 21 Export Print Personal Material Database XML Visualization Image Closure Plot Window 1 Window 2 Window 3 Window 4 Closure Plot Window 1 Window 2 Window 3 Window 4 Figure 14 File Export and File Print Menus 22 Edit Undo Redo Copy Paste Delete Select All Figure 15 Edit Menu 23 Database Point Database Samples Figure 16 Database Menu 24 Point Database gt Add Point Set Active Point Sets Point Set Properties Figure 17 Database Menu Point Database 25 Properties Add Properties Disable Properties Figure 18 Database Menu Properties 26 Samples gt Add Sample Active Samples Sample Properties Figure 19 Database Menu Samples 27 User Add User Disable User Edit User Add Group Edit Group Figure 20 Database Menu Users 28 Help Online Manual About MSDTool Figure 21 Help Menu 29 2 4 10 Non Logged in Mode Menus Before the user is logged in to the MSDTool database server and algorithmic framework the user may only select to either 1 Login or 2 Exit from the File menu All other menus are disallowed 2 4 11 Logged in Mode Menus Once the user has successfully logged in the application shall be in logged in mode Therewith the ap plication shall permit the end user full permission to operate in either the end user persona or administrative user perso
13. available point sets instead of samples 2 4 8 Edit Point Set Window The Edit Point Set Window Figure 10 allows users to select a particular available point set for editing The first three tabs are identical to the Edit Point Set Window Figure 9 The only difference is that different properties can be binded to a point set this gives rise to the properties tab The Properties tab allows users to pick specific properties to bind to the data points these properties can then be selected later when the user views the point set in the graphs The users can select a particular property type and then when the OK button is pressed all the properties under that type will be added to the available pool 15 2 4 9 Add Point Set Window The Add Point Set Window Figure 11 allows the user to insert a point set into the current pool of available point sets The new point set is specified in the same matter as in the Edit Point Set Window Figure 10 File Logout Import gt Export gt Print Exit Figure 8 File Menu 16 Edit Sample Edit Sample Information Data Permission KurzLabel L Fundamental Zone Edit Sample Edit Sample Information Data Select Sample User Permissions Label Lab Date Property List M Read Label Lab Date Property List Label Lab Date Property List Group Permissions Label Lab Date Property List Label Lab Date Property List Y Read L
14. coefficients e g Databases in MSD terminology 2 1 2 Formats Equivalent to Fourier Coefficients The system allows an authorized user to add a new collection of non Fourier coefficients provided that they can be converted to a Fourier series 2 1 3 Formats Equivalent to Fourier Coefficients Interface The system allows a developer to add methods of converting a stream on non Fourier coefficients into Fourier coefficients through MSDTool _ s application interface 2 2 Overall Functionality The above figure gives the general flow of the application from a functionality perspective The user imports the data from three microstructural analysis techniques Then the user generates a report from the data to obtain one large volume of uniform data From this the user graphically views the different properties These properties come from different mathematical models One point statistics approximates the distribution of properties throughout the material The two point statistics provides a more accurate view of the material properties however its mathematical model cannot describe certain details that one point manifests We may choose properties from user defined materials or from the database which contains the single crystal elastic constants to generate the boundary of the closure Within the closure the user may select the start and end point for a process path The application then calculates a possible optimal path along the t
15. computing closures require solving quadratic programming optimization problems These closure computations require a considerable amount of computation time 1 2 Goals In general MSDTool aims to provide three central resources for the MMG and designers of custom materials First an application that allows for the visualization of property closures for materials Addi tionally the effective property ranges of sample materials may be plotted within these closures Second a framework that allows researchers to add new algorithms i e property calculators to the application that support a new property Third a back end database which stores atlases of material closures These closures will be computed continuously as new algorithms are added to the framework and will be stored on the database server 1 GUI Application Given the ad hoc nature of the existing software tools a user interface for a given unit of the tool chain behaves inconsistently and unintuitively Solving this problem requires direct application of 1 software engineering techniques that permit new tools to coexist with current tools and 2 coherent visual communication mechanisms to manage it Moreover certain aspects of the algorithms directly lend themselves to graphical modalities of interaction 2 Software Integration The MMG s current technique tool chain consists of a loose set of software modules that the MMG developed in a wide range of computer languages
16. e property list that is tied to them 2 4 5 Edit Sample Window The Edit Sample Window Figure 9 lets users change information about a selected sample There are three tabs in the edit sample window that correspond to the three different parts of the sample you can edit From left to right they are the Information tab the Data tab and the Permissions tab The Information tab allows users to tag the sample The user can enter a label for the sample the source of where it came from e g the high level point set of where the sample is from and a description about the sample so the user can store any special reminder information they would need for future use of the sample The Data tab allows the user to change the underlying data file the sample is tied to The user can browse either the local disk or the server for another data file Fourier Coefficients or Euler Angles to bind to the sample The Permission tab allows the user to set UNIX like permissions on the file so it can be restricted both locally and on the database 2 4 6 Add Sample Window The Add Sample Window Figure 12 allows the user to insert a sample into the current pool of available samples The new sample is specified in the same matter as in the Edit Sample Window Figure 9 2 4 7 Select Point Set Window The Select Point Set Window Figure 10 is identical to the Select Sample Window Figure 9 in func tionality The only difference is that the list box contains
17. ed in their calculation particularly and from whence came the assumptions Instead they have opted to simply import the raw data from the software and calculate the properties using their own methods 2 Functional Requirements The central goal of the project creates an application to aid designers in the creation of custom materials Designers conduct materials design over the property space of interest MSDTool allows users to explore this property space chiefly in the form of a 2D closure In addition to this primary visualization the application GUI will provide a number of other useful visualizations that the MMG have requested This application will also support all administrative actions on the database that contains pre calculated clo sures user account information code points for property calculation algorithms and other miscellaneous physical constants In essence this client application will be the core functionality of the entire MSDTool system The following section can be broken down into several subsections The mathematical methods used to calculate these properties are given a brief overview in the Core Algorithms section These algorithms are chiefly the result of prior and on going research of the MMG Finally we present a detailed description of the exact functionality of the application through its GUI 2 1 Input Formats 2 1 1 Fourier Coefficients The system allows an authorized user to add a new collection of Fourier
18. ials 4 The party invested in the continued operation of the system for a community of end users 31 34 5 Index 35 Index API 30 application 4 authentication tokens 31 automation 3 C Programming Language 3 commercial viability 3 Core Algorithms 5 custom materials 4 database persona 29 designers 4 Drexel University 2 Fortran 3 Functional Requirements 4 graphical user interface 3 Group Databases 29 Installation wide material databases 29 Lab wide material databases 29 LDAP 31 Matlab 3 Mechanics of Microstructure 2 5 modalities of interaction 3 OIM 4 Personal Databases 29 Raman Spectroscopy 4 space of properties 4 system administrator 31 tool chain 3 user interface 3 Visual Basic 3 36
19. na depending on the respective account settings File Figure 8 displays the file menu that becomes available after system users has logged in Logout Logout permits the current user to return to the NON LOGGED IN mode Import Import Figure 13 permits the current user to return to perform bulk loads of PERSONAL MATERIAL DATABASES that were exported with MSDTool Export Export Figure 14 permits the current user to export PERSONAL MATERIAL DATABASES to an XML file and permits the user to export plots or visualizations windows to a rasterized graphics file Print Print Figure 14 permits the current user to print any open plot or visualizations Exit Exit permits the user to leave the MSDTool and will do so after committing any pending database operations Edit A standard windows Edit Menu Figure 15 allows the end user to edit any user mutable field as is inherited by the Windows User Interface Guidelines additionally the user will be able to copy the current open visualizations to the clipboard Database The Database menu Figure 16 permits the user to mutate settings in the MSDTool database Point Database Point Database Figure 19 permits the user to add new point sets from which closures will be computed Samples Samples Figure 19 permits the user to add new material samples Users User Figure 20 permits administrative users to add accounts and modify existing users If the user has no permission to do so this menu
20. ng Analysis MSDTool supports the ability to calculate properties of existing materials These data define points in a high dimensional space that represents the set of properties a given material has Adding new materials to the database of existing materials is the providence of either 1 the system administrator or 2 a privileged user 2 3 2 Reverse Processing Synthesis Reverse Processing constitutes the ability to synthesize new materials from existing materials A convex hull consisting of the physically realizable possibilities 2 4 GUI 2 4 1 Login In order for a user to access any of the functionality of the MSDTool application they need to first login This login process is necessary to connect to the database of material closures Without access to this database there is really no functionality that MSDTool can support This is why logging in is a requirement for application use The login window Figure 3 will be presented to a user upon application startup or by accessing it from the File menu The window is identical to the standard login process requiring the user to specify their user name and password In addition the database server address must be entered A history of these servers will be remembered from previous login attempts If the user wishes to specify a new database server they may click the new item in the drop down and type the address If the database login is successful then the main application window
21. own menus for quick access If the user wishes to change other details about the closure they may click the large edit button on the bottom right of the display This window allows the same property selection process in addition to other important details such as material type Other functionality of the MSDTool application is provided through the main window Interaction with the graph via left and right mouse clicks presents other functions One key function is the ability to add sample data from real materials and plot their effective property ranges within the closure This feature may be accessed via a right click context menu on the graph or through the Database Menu Section 2 4 11 Clicking Add Sample from the context menu will open the Add Sample Window Section 2 4 6 Editing a sample Section 2 4 5 may be accessed by right clicking the sample box and clicking edit sample Samples may be removed from the graph as well from this menu The final item in the right click context menu of the closure graph is the view sub menu This menu provides access to all additional views that can be associated with a given point or sample in the closure These views can enable the user to see details of the underlying microstructure that manifests these property values One such view is the Pole Figure Viewer Window Section 2 4 2 The MMG has a number of views they would like to support but the details of these have not been described to date We will assume
22. r Diffraction EBSD The diffraction patterns produced at each point are heavily processed and the orientation parameters are extracted if possible The MMG group uses a commercial application to perform OIM The user may export this data from the commercial application in a simple ASCII text representation containing a set of Euler angles as floating point numbers for each grid point These Euler angles represent the crystallographic orientation 1 3 2 Raman Spectroscopy Raman Spectroscopy obtains the chemical composition of a material by X Ray diffraction The vibra tional information gathered from a sample material serves as a sort of fingerprint for molecular structure of the material The MMG uses another commercial application to gather this information in the form a set of spectra The format is a set of tuples of floating point numbers 1 3 3 Nano indentation Nano The MMG also uses Nano Indentation This technique involves using a special machine to depress an indenter of known geometry into a material The machine applies more load onto the material as it pushes the tip deeper into the material and records the area deformed in this process The MMG group uses a commercial tool to run the nano indenter machine and record the load vs displacement data In addition this application derives many mechanical properties of the material However the MMG have decided against using these derived properties because of concerns about the methods us
23. these views are extra features that will not effect the acceptance functionality of MSDTool The remaining application functionality can be accessed from the Main Menu Section 2 4 11 12 MSDTool File Edit Database Help Context Menu Add Sample C1313 Gpa C1111 Gpa Property Selector Properties Stiffness Tensor a C1111 C2222 Dry C333 Hr C1212 New Analysis Technique I eN KI313 v New Analysis Technique II av 11111 Biv p Contour 2 Pt Plot v Figure 6 Main Window 2 4 3 Pole Figure Viewer Window 13 cancel J update Since materials research deals with the visualization of tiny crystalline structures that make up the mate rial alternative visualizations are needed to get a grasp on the position and orientation of these crystals MSDTool allows visualization of these structures through the use of 2D 3D graphs called pole figures Pole figures are basically graphs that represent the distribution of the orientations of the crystalline struc MSDTool allows the visualization of single and multiple sample point set data in a Pole Figure Viewer Window Figure 7 Pole figures can be viewed in both 3D and flattened to be viewed in 2D The Pole Figure Viewer Window allows the user to manipulate the figure in multiple ways The user can use the graph type drop down to either view the figure as a contour map or as each point separately in 3D
24. which these techniques are based is complex and beyond the scope of this document However a short discussion of key concepts and terms is absolutely vital to understanding the functionality and value of MSDTool The MMG s work has lead to the development of two key concepts within the MSD paradigm the microstructure hull and the property closure The microstructure hull is the set of all possible microstruc tures that are relevant to a design problem based on the governing physics From this hull a property closure can be derived The closure is a description of all physically realizable values for a property set of interest The property closure is particularly useful to material designers because it provides a map of where they are at least theoretically able to go in terms of the space of properties This view becomes even more useful when one can use modern microstructure analysis equipment to examine a sample material and find out where it lies in the closure space The MSD techniques that MSDTool is primarily concerned with are of three classes a algorithms which take as input a microstructure description e g crystallographic orientation and compute material properties e g Elastic Stiffness b methods for computing closures for a given sets of properties c and rendering algorithms for visualizations of microstructures The MMG has implemented many such techniques and it continues to develop new ones Many of the techniques for
25. will become active and the user may begin using MSDTool However at least two connectivity errors may occur First the server name may not be resolved by the domain s DNS this leads to an unknown server error Figure 4 Second the server may not accept the login for a number of reasons such as incorrect user name or password Figure 5 MSDTool Figure 3 Login Window MSDTool Server Error Figure 4 Login DNS Error 10 Server Error Figure 5 Login Server Error 11 2 4 2 Main Window MSDTool s main window Figure 6 becomes active after a successful user login It is from here that the rest of the application functionality may be accessed The center of the window contains the main view of the current closure that the user is analyzing This 2D plot is a closure on two specific scalar properties of interest Along the vertical and horizontal axes of this closure the user may select these two properties of interest The two property drop down boxes contain the same list of property names e g components of the elastic stiffness tensor C1111 C2222 etc These drop downs allow quick changes of the closure The contents of these lists is only a subset of the total available properties This subset can be selected by opening the property chooser menu by hitting the more item The property selector provides a hierarchal view of all available properties and allows the user to select which ones will appear in the drop d
26. wo points The process takes into consideration whether a particular path physically exists 2 3 Core Algorithms The set of algorithms used in MSDTool fall into two equivalence classes 1 extracting properties from the current set of physically realizable properties through experimentation i e Forward Processing 7 Repeat for various planes OIM Calculate ee statistics a YA Import Raman Data Synchromze View Data View Two Material Choose Closure properties Texture one 3 Point stats LT AS point User defined Choose materials properties from properties database a Calculated Closure and plot Plot know materials Calculate material in closure roperty and plot Plot process paths Froc ss propery and pio si lt j Design Material _ _ Choose point in Choose start point Design Closure of known material 2 Calculate required Calculate best path texture and plot from start to end Calculate required 2 pt stats Reconstruct Material X ready xport proces Export 0 p Export ae Export texture Export FREI database specification Figure 2 A flow chart modeling the overall intended functionality of the MSD Tool application oO Le 8 5 g O 5 5 I and generating recipes for producing a new material with a needed set of properties from the set of existing physical realizable materials 2 3 1 Forward Processi
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