Patran 2008 r1 Materials User's Guide

Patran 2008 r1

Materials User’s Guide

Worldwide Webwww.mscsoftware.com

DisclaimerThis documentation, as well as the software described in it, is furnished under license and may be used only in accordance with the terms of such license.MSC.Software Corporation reserves the right to make changes in specifications and other information contained in this document without prior notice.The concepts, methods, and examples presented in this text are for illustrative and educational purposes only, and are not intended to be exhaustive or to apply to any particular engineering problem or design. MSC.Software Corporation assumes no liability or responsibility to any person or company for direct or indirect damages resulting from the use of any information contained herein.User Documentation: Copyright ©2008 MSC.Software Corporation. Printed in U.S.A. All Rights Reserved.This notice shall be marked on any reproduction of this documentation, in whole or in part. Any reproduction or distribution of this document, in whole or in part, without the prior written consent of MSC.Software Corporation is prohibited.The software described herein may contain certain third-party software that is protected by copyright and licensed from MSC.Software suppliers. Contains IBM XL Fortran for AIX V8.1, Runtime Modules, (c) Copyright IBM Corporation 1990-2002, All Rights Reserved. MSC, MSC/, MSC Nastran, MD Nastran, MSC Fatigue, Marc, Patran, Dytran, and Laminate Modeler are trademarks or registered trademarks of MSC.Software Corporation in the United States and/or other countries. NASTRAN is a registered trademark of NASA. PAM-CRASH is a trademark or registered trademark of ESI Group. SAMCEF is a trademark or registered trademark of Samtech SA. LS-DYNA is a trademark or registered trademark of Livermore Software Technology Corporation. ANSYS is a registered trademark of SAS IP, Inc., a wholly owned subsidiary of ANSYS Inc. ACIS is a registered trademark of Spatial Technology, Inc. ABAQUS, and CATIA are registered trademark of Dassault Systemes, SA. EUCLID is a registered trademark of Matra Datavision Corporation. FLEXlm is a registered trademark of Macrovision Corporation. HPGL is a trademark of Hewlett Packard. PostScript is a registered trademark of Adobe Systems, Inc. PTC, CADDS and Pro/ENGINEER are trademarks or registered trademarks of Parametric Technology Corporation or its subsidiaries in the United States and/or other countries. Unigraphics, Parasolid and I-DEAS are registered trademarks of UGS Corp. a Siemens Group Company. All other brand names, product names or trademarks belong to their respective owners.

P3*2008R1*Z*MAT*Z*DC-USR

Corporate Europe Asia Pacific

MSC.Software Corporation2 MacArthur PlaceSanta Ana, CA 92707 USATelephone: (800) 345-2078Fax: (714) 784-4056

MSC.Software GmbHAm Moosfeld 1381829 Munich, GermanyTelephone: (49) (89) 43 19 87 0Fax: (49) (89) 43 61 71 6

MSC.Software Japan Ltd.Shinjuku First West 8F23-7 Nishi Shinjuku1-Chome, Shinjuku-Ku Tokyo 160-0023, JAPANTelephone: (81) (3)-6911-1200Fax: (81) (3)-6911-1201

C o n t e n t sMSC Patran Materials Enterprise

1 MSC Patran Materials OverviewPurpose 2

System Description 3

Definitions 4

Using MSC Patran Materials 10Opening an MSC Mvision Database 11Selecting Materials 12Performing a Database Query 17Property Set Selection 20Material Application Selection Display 28Properties Mapping 29Database Mapping Templates 30Naming Format for Database Mapping Templates 31MSC Mvision Database Units 32

2 MSC Patran Materials FormsMaterials Selector 36

Using Materials Selector 37

Open Materials Database Form 38

Materials Selector Form 39Materials Selector Spreadsheet 39Query Command Textbox 40Column Headers Form 41

Materials Application Form 43

Query Panel 44

Property Set Selection 45

Mapping MSC Mvision Attributes to MSC Patran Material Properties 47Attribute List 48

MSC Patran Materials Enterprise

iv

Mapping Templates 50Open Mapping Templates 50Save As Mapping Templates 51

3 MSC Patran Materials EnterpriseOverview of MSC Patran Materials Enterprise GUI 54Supported Operating Systems 54

Accessing MSC Patran Materials Enterprise from MSC Patran 56

Logging into MSC Patran Materials Enterprise 58

Selecting Materials in the Material Browser Frame 60Using the Parameters 60Using the Pick List 62The Pedigree Frame 63Using the Material Frame 63Verifying the Data in MSC Patran 65

Reconnecting to a Material in Subsequent Sessions 68

Documenting Source of Data 70

Chapter 1: Patran Materials OverviewPatran Materials Enterprise

1 Patran Materials Overview

Purpose 2

System Description 3

Definitions 4

Using Patran Materials 10

Patran Materials EnterprisePurpose

2

PurposeThe Patran Materials provides the Patran analyst with materials data from MSC Mvis ion Materials Databases. The MSC Mvision Materials Software System was created by MSc.Software Corporation (MSC) for materials selection, visualization, and data integration. The Patran Materials integrates Patran and MSC Mvision to quickly and accurately provide the analyst with up-to-date, traceable materials data.

Most important to the analyst, several commercial MSC Mvision databases are available. There are Standards Databanks of U.S. Government provided data; MIL-HDBK-5 (metals), MIL-HDBK-17 (composites), and PMC90 (advanced composites) and the Producers Databanks for Plastics, Metals, Ceramics, and Composites. The Standards Databanks are electronic renditions of standard, independently evaluated materials property data sources that are appropriate for all phases of analysis. The Producers Databanks are comprehensive electronic libraries of materials data from materials producers worldwide that are appropriate for initial conceptual analysis.

MSC.Software maintains these databases and plans to release additional databases in the near future. In addition, using the MSC Mvision Materials System Builder, engineers can capture, organize and reduce materials test data to create their own MSC Mvision materials property databases for design and analysis.

Materials information plays an important part in Patran engineering simulations. The material properties used in mechanical and thermal applications directly affect the accuracy of the solution. The Patran Materials provides Patran users with a reliable and accurate source of materials information using the MSC Mvis ion Materials Database System.

3Chapter 1: Patran Materials OverviewSystem Description

System DescriptionThe Patran Materials provides a simple and easy to use interface for access to MSC Mvis ion materials databases. Patran Materials is integrated into the Materials function as a Method option. Choosing Materials Selector as the method of creating a Patran material activates the selection process.

The process of reading an MSC Mvision database begins by selection of a specific database. Database are stored in the Patran directory structure when Patran is installed. Selecting a database name opens the database and presents the materials in a spreadsheet-like display. Selection of materials is simply a matter of scanning the list for an appropriate material and picking it from the list.

When a material is selected from a database, the key material properties are transferred directly to the Patran database. The source and background information of the material is also stored in the Patran database. This maintains a traceable link between the material selected and the material properties used in the Patran model.

The key to the interface is a special template file which provides an initial mapping of the MSC Mvis ion database to the Patran Materials properties. Each database provided by MSC is shipped with a set of matching template files that map the material attributes in the database to specific Patran material properties. A separate template file is required to map each database to a specific Patran material type, since each material type requires different material properties.

Database query tools within Patran Materials allow the user to search the database for materials that match specific design criteria. These specialized lists of materials can be recalled by creating new template files containing the user database criteria. In addition Patran Materials can view any MSC Mvis ion database including those created by the customer using the MSC Mvision Materials System Builder.

Patran Materials EnterpriseDefinitions

4

Definitions AttributeA database attribute is an entity within the database, defining a specific property of a material. Attributes may be material properties such as Youngs Modulus or database organizational entities such as Date Last Modified. Attributes may be numbers, character strings or curves. Attributes are organized into logical groups called Relations, 8.

Column HeadersWhen the database is displayed in the Materials Selector form, several database attributes or attribute expressions are presented at the top of the spreadsheet columns. These attributes or expressions are the column headers.

There are two types of column headers: pedigree and property set.

The Pedigree, 7 column headers are used to select materials from the database. Each row in the spreadsheet represents a unique combination of the pedigree column headers.

The Property Set, 7 column headers display the range of values for the row’s pedigree column headers. If there are no pedigree column headers, then only a single material row appears displaying the entire range of values for the column headers.

The column headers are saved as part of the template.

DatabankA database provided by MSC.Software, such as the Standard Databanks of U.S. Government data or the Producers Databanks.

DatabaseA database is an MSC Mvision materials database file.The Patran Materials reads MSC Mvision databases and stores selected material properties in the Patran database.

ExpressionsExpressions are any mathematical calculation consisting of MSC Mvision attributes, values, Functions, 5, and operators. For example,

777.777temptemp/777.777log( temp )log( temp ) * e11t/e22tinterp_x( cpvstemp, 72 )sqrt( log( sin( temp )))

where temp and ctcvstemp are database attributes. These expressions are used in queries, mappings, and column headers.

5Chapter 1: Patran Materials OverviewDefinitions

Figures Figures are MSC Mvision attributes that are composed of graphical elements. A graphical element is either curve points, scatter points and/or runout points. The Patran Materials uses only the curve points and displays these as solid lines.

FunctionsThese are the available functions for Expressions, 4 in the queries, mappings and column headers.


6

Function Description Exampleabs Absolute value abs( -2.7 ) = 2.7, abs( 2.7) = 2.7acos Arc cosine acos( .5 ) (Radians)asin Arc sine asin ( .5 ) (Radians)atan Arc tangent atan( .5 ) (Radians)ceil Smallest integer not less

than xceil( -2.7) = -2, ceil( 2.7 ) = 3

cos Cosine cos( .5 ) (Radians)cosh Hyperbolic cosine cosh( .5 ) (Radians)degtorad Degrees to radians degtorad( 180 ) = 3.14159erf Error function erf( .5 )exp e raised to the power of x exp( 1 ) = 2.71828floor Greatest integer not greater

than xceil( -2.7) = -3, ceil( 2.7 ) = 2

if Conditional statement. Returns the value of first expression if logical expression is true; otherwise, returns the second

if (logical expression, any expression, any expression)

if ( e11t ex, e11t, 777 ) Note: “any expression” must be of the same types, reals with reals, curves with curves, etc...

interp_x Interpolate on x axis interp_x( cpvstemp, 100 ) interp_y Interpolate on y axis interp_y( cpvstemp, 100 )log Natural log log( 2.71828 ) = 1log10 Log base 10 log( 100 ) = 2nvl Conditional Null, 7

statement.

Returns the first expression if its non-null; otherwise, returns the second.

nvl( any expression, any expression ) nvl( interp_x( cpvstemp, temp ), cp ) Use cp’s value if interp_x(cpvstemp, temp ) is null

Note: “any expression” must be of the same types, reals with reals, curves with curves, etc...

radtodeg Radians to degrees radtodeg( 3.14159 ) = 180round Round to nearest integer round( -2.7 ) = -3, round( 2.7 ) = 3sin Sine sin( .5 ) (Radians)sinh Hyperbolic sine sinh( .5 ) (Radians)sqrt Square root sqrt( 16 ) = 4


MappingMapping is the assignment of MSC Mvis ion database attributes to Patran material properties. Attributes differ from database to database, especially for custom databases created with the MSC Mvis ion System Builder. Mapping is required to make the transfer of data from the MSC Mvis ion database to Patran. The mapping is saved as part of the template.

NullNull is MSC Mvis ion representation of not having any data for an attribute at a given condition. It is represented on the display as “-0-”.

PedigreePedigree attributes are attributes which define a material. These are attributes which describe its name, type, form, etc... All other attributes provide properties of the material such as its elastic modulus, specific heat, stress/strain curve, etc.

Property SetMaterials databases are divided into several tables. There is at least one pedigree table and at least one property set table. The pedigree tables contain the attributes which define the material (e.g., name, type, form, etc...) The property set tables contain attributes which define properties (e.g., elastic modulus, specific heat, stress/strain curve, etc...) The common material properties are grouped into property set tables so they can be worked with easily. Typically, linear data is grouped into a property set and each curve is grouped into its own property set. So, if a material had both linear and nonlinear data, they would be represented in separate property sets.

tan Tangent tan( .5 ) (Radians)tanh Hyperbolic tangent tanh( .5 ) (Radians)trunc Truncate real to integer trunc( -2.7 ) = -2, trunc( 2.7) = 2

Function Description Example


8

QueryThe query is a set of conditions placed upon the database, limiting the materials shown in the Materials Selector. A typical query might be to display the materials with a Tensile Modulus of Elasticity greater than 10 Msi (E_T > 10). A Query Panel is available to assist in the creation of valid query commands. The Query Panel lists the databank attributes and pertinent information such as attribute units. The query conditions are stored in the template.

RelationsA database relation is a collection of attributes forming a table, a figure, or a level in the database hierarchy. These relations determine how their attributes display in the material displays. In the Material Select Panel, pedigree attributes display as single values and property attributes display as ranges. In Property Set, 7 select panel, all attributes display as single values.

In this example, cname and temp are pedigree attributes and table and e11t are Property Set, 7 attributes.

TemplateA template is a special file associated with a MSC Mvis ion database that determines how the user sees an MSC Mvision database. The template saves the mapping of database attributes to Patran properties, the column headers, and query conditions. Each database has multiple templates, one for each of the Patran material types (Isotropic, Orthotropic, etc.). The appropriate template is applied automatically when a database is opened.


UniquingUniquing is the process of selecting a unique material from the Materials Selector. The material display allows a material type to be picked. But it is very likely that the material chosen has several subtypes. So it is necessary to complete the selection by picking the material from all possible differences. The Property Set Panel displays all the possible choices that the selected property set can have. This panel displays only those property sets which have attributes mapped and only those attributes which have differences. For a complete listing of the attribute values, change the Material Application Selection Display, 28 option from “Mapped Properties” to “Database Attributes.” All non-null attributes with values display here.

Patran Materials EnterpriseUsing Patran Materials

10

Using Patran MaterialsTo invoke, activate the Materials function, set the Action to Create and the Object to a suitable material type (Isotropic, Orthotropic, etc.). Then set the Method to Materials Selector. This activates the Open Database form.

11Chapter 1: Patran Materials OverviewUsing Patran Materials

Opening an MSC Mvision Database Databases are located in a directory called mvision located in the Patran path. Normally the Open Database form starts with this directory. To open a database in another directory, use the Directories list box to navigate to the directory where the databases are located.


12

Select a database name and choose -Apply-. The Materials Selector opens the database and searches for a complementary template. The templates are stored in the same directory with the .mvtm suffix and determines how the database is presented in the Material Selector.

A different database may be chosen at any time by selecting the Select Database button on the main Materials Selector form. This activates the Open Databases form shown above. There is no need to close the current database before opening a new database.

Selecting MaterialsThe Materials Selector form lists the materials in the open database using a spreadsheet-like display. The top row of the spreadsheet shows the database attributes selected for display. The second row of the


spreadsheet shows the units for the attributes listed in the first row. The rest of the spreadsheet contains the material data found in the MSC Mvision database.

MSC Mvis ion Databases are organized on a hierarchical scheme. Each database has its own scheme. The Materials Selector is designed to simplify the presentation of the database by displaying materials based upon the database attributes shown at the top of the spreadsheet. Each row of the spreadsheet represents a single material or several materials depending upon the spreadsheet Column Headers, 4.

To pick a material, use the scroll bars on the right and bottom of the spreadsheet to examine the materials. When you find a material, pick the row with the mouse. This loads the properties for that material into the material display of the Material Application Selection Display, 28.

Several features on this form help you view and select a material. These features include changing the Column Headers, 4, limiting the data displayed using a Query, 8 mechanism, viewing the spreadsheet cells and assisting in moving to the Property Set Selection, 20.

Query CommandThe Query Box under the words Query Command displays the current query that controls the displayed data. The query string entered here is editable and modifies the displayed data. To operate it, enter a valid query and press carriage return or click on the Apply button. This reloads the Material Spreadsheet with the reduced data set.


14

Pressing the Clear button clears the query command. It is necessary to click on the Apply button to process an empty query. An empty query returns all materials matching the column headers.

The Query Box is provided to display the current query and provide a means to quickly enter or edit the query command. Use the Performing a Database Query, 17 to create more complex queries because it provides the tools to help you do so.

Note: Changing units with a numeric query specified does not change the numeric values in the query string and the system most likely will return zero rows. This is because the database values no longer match the query’s unit system.

Auto ExecuteThis toggle button is a convenience function that presses the Display Material’s Properties, 15 button with each material selection. Toggling it OFF allows the selected spreadsheet cell to be examined in the Selected Cell Data, 14.

To display the property sets panel when the toggle button is OFF, press the Display Material’s Properties button.

Selected Cell DataThe Selected Cell Data displays information about the selected attribute or expression cell. The information displayed is the attribute or expression column header, its description if its an attribute, its value, units if available and any footnote and metadata.


This is useful because the cells in the spreadsheet are small and often the full contents of the cell are not visible.

Display Material’s PropertiesOnce a material has been selected, it is necessary to select the individual Property Set, 7 rows. To do this press the Display Material’s Properties button. This displays the Property Set Selection, 20 panel.

Column HeadersThe Column Headers are the words appearing at the top of the spreadsheet columns. These are attributes or Expressions, 4 used to select unique combinations of materials from the database. These combinations are based only on the Pedigree, 7 attributes and expressions.

There are two types of column headers: pedigree and property set.

The Pedigree, 7 column headers are used to select materials from the database. Each row in the spreadsheet represents a unique combination of the pedigree column headers.

The Property Set, 7 column headers display the range of values for the row’s pedigree column headers. If there are no pedigree column headers, then only a single material row appears displaying the entire range of values for the column headers.

The following figure shows a Material Spreadsheet with column headers CNAME, TEMP/2, TABLE, E11T. CNAME and TEMP/2 are pedigree headers and TABLE and E11T are property set headers.

Note: Setting the Auto Execute, 14 toggle button presses this button automatically with each material selection.


16

Because CNAME and TEMP are pedigree attributes they result in unique combination of their values. TABLE and E11T are Property Set, 7 attributes and result in ranges. TABLE has only one value for Epoxy at 35 degrees, that is Table 1. But it has multiple values for E11T, 1.2 to 5.3. On row 2 Graphite at 100 degrees has more than one TABLE value but the E11T value is 5.7. E11T has either one row with 5.7 or all the rows have 5.7 as the E11T value.

This logic carries into Expressions, 4 too. Any column header expression which contains a Property Set, 7 attribute is a property set column header. A pedigree column header expression contains only pedigree attributes. For example,

To change the column headers, pick the Column Headers button at the top of the Materials Selector form.This activates the Column Headers form as shown in the next illustration. The Column Headers form has one list box and two text boxes. The list box at the top of the form contains a scrolled list of database attributes. When you pick an attribute from this list, the attribute’s characteristics are displayed in the second list box and the attribute is added to the list of attributes in the textbox at the bottom of the form. You’ll notice that only numeric and string attributes are listed in the attribute list, all others are illegal. Although, you can use Functions, 5 to change a curve attribute into a numeric value (e.g., INTERP_X, INTERP_Y).

The textbox at the bottom of the panel lists the column headers for the Material Selector. Attributes are listed in the order they appear on the spreadsheet. You can modify the items in the textbox using the mouse to select items and delete them or you can type directly into the textbox by picking an insertion point with the mouse and typing the new attribute from the keyboard. Attributes and expression must be separated by commas.

When the column headers are set press the Apply button.

Pedigree expressions: TEMP/2, TEMP*DENS,LOG(TEMP)Property set expressions: E11T/2, E11T*TEMP, INTERP_X (CPvsTEMP, TEMP)


Performing a Database QueryThe Query command is a useful tool for finding a specific material or materials with specific properties. In a large database, the Query can quickly limit the materials to a manageable number by removing from the display materials that do not meet your requirements.


18

When a database is opened, it shows all materials in the database. Often you know specific things about the material you seek. Using the Query, you can filter the materials in the Materials Selector to show only those materials that match your criteria.

Query uses a simple syntax based upon a subset of ANSI Structured Query Language (SQL). A Query is formed by the combination of an attribute, a query operator, and a value. A typical Query command might be:

CNAME LIKE '*ALUMINUM*'

Another Query that limits the materials to only those with Elastic Modulus would be:

E11T EX

The two queries could be combined as follows:

CNAME LIKE '*ALUMINUM*' AND E11T EX

CNAME is the attribute for the material’s Common Name.LIKE is the query operator for comparing string data.'*ALUMINUM*' is the comparison string. The asterisks (*) are wild characters and

stand for any number of characters. An asterisk at the beginning and end of the string causes a match when aluminum appears anywhere in the common name.

E11T is the attribute for a Elastic Modulus in the longitudinal direction.EX is the query operator for existence. Exist is a special query operator that does not

require a value.


This would limit the Materials Selector to display only materials with aluminum in the common name that have Tensile Elastic Modulus data.

In addition, the Materials Selector allows for queries on calculated properties called Expressions, 4. This allows for a query that requires MSC Mvision to combine materials data to form new properties as the object of a query. For example, if we wish to view all materials having a specific tensile yield strength greater than 400 ksi/lb•in3. Specific tensile yield strength is not an attribute of the data, but can be calculated by dividing tensile yield strength (YS11T) by density (DENS). The query command is:

YS11T/DENS > 400

Query operations can become quite complex, permitting customized views of a database. A special Query panel is available to simplify the creation of a valid query. The Query panel is discussed in the Query Panel Form, 19.

Query assumes the units of the query are the same as the units set for the current system. If the current database has been set to use SI units, the query conditions are assumed to also be in SI units. If the database is set to use Imperial units, then the query assumes Imperial units. Query units are shown in the Attribute Information scrollbox of the Query Panel Form, 19.

Query Panel FormThe query panel shown below is designed to simplify the creation of valid queries. The form is divided into three parts.

Note: When a template is saved, it stores the current query and when the template is opened, uses the query to limit the active database before showing it on the Materials Selector. Query conditions may be altered at any time but only the current conditions are saved in the template.


20

Property Set SelectionClicking on the Display Material’s Properties, 15 button in the Materials Display panel activates the Property Set Selection panel. From this panel, you complete the material selection by picking from the list of Property Sets (p. 7). The property sets are listed in three possible categories; ones that need a row selected, ones with only one row (the row is automatically selected), and ones which don’t have any data associated with the material selection so they are empty and no selection is possible.

Attribute Two list boxes in the upper left part of the form. One box contains a full listing of all attributes in the database. The second box contains information about an attribute when it is picked from the first box. Picking an attribute puts the selection at the end of the query string at the bottom of the form.

Operators A set of buttons on the right of the form. Choosing these buttons puts the selected query operator at the end of the query string at the bottom of the form.

Query Command The query string is constructed in this box by selecting from the Attribute and Operator sections of the form or by typing directly into the textbox. You must first click with the mouse pointer in the textbox before typing. To delete part of the query command, click on the string to create an insertion point and use the keyboard backspace or delete to remove characters from the string.


Select Property Set ListProperty Sets (p. 7) with multiple data rows are listed in the Select Property Set list. You must select an individual property set or row. These property sets need a row selected to complete the material selection. This is because some of property set’s attributes contain more than one possible value for the selected material.


22

When a property set name is selected, it highlights and displays the property set rows in the property set spreadsheet. Selecting a row from the property set spreadsheet adds it to the Current Property Set Selections, 25 panel and removes the property set name from the Select Property Set list.

When the Select Property Set list is empty, the material selection is complete. To put the material into Patran, click on the Create Material, 27 button.

The selected property sets can be redisplayed by reselecting the property set from the Current Property Set Selections spreadsheet.

A property set row is considered selected until you return to the Selecting Materials, 12 or display the Properties Mapping, 29. Both of these actions reset all the selected property set rows. It’s necessary to reselect the property sets if you pick that same material from the Material List spreadsheet.

Empty Property Sets ListProperty Sets (p. 7) which do not have any data rows but satisfy the material type are listed here. Mappings containing these property set’s attributes have and Null, 7 values put into the Patran database for their properties.


How to Picking a Property Set with DataSelecting a material that contains the desired data is sometimes more difficult than just picking a row from the Material List display. When the data that you desire is Null, 7 you can do one of the following: Select another material row, change the column headers, or change the query.

Selecting Materials, 12 is an easy method to get your data. Turn OFF the Auto Execute, 14 toggle button on the Material List form, select a material row and look at the Material Application Selection Display, 28 form’s Display window using the Mapped Properties option. If the mapped attribute’s value is not null when the material row is selected then the attribute’s property set contains at least one property set row. Then, click on the Material List form’s Display Material’s Properties, 15 button to display the property set’s data rows.

Column Headers, 15 are similar to selecting another material except you display the data in the Selecting Materials, 12 form. So, change the column headers to include the attributes of the desired property sets. When the Material List form displays, it is easy to see which material row contains data. There is either a value, range or null in the spreadsheet cell. Pick any row containing either a value or a range and the attribute’s property set will contain at least one data row. This is more difficult with a curve property set. Since curves can not be column headers, use the interpolate function to convert it to a numeric value.

INTERP_X( SIG11TvsEPS, 70 )

Material rows containing a curve have values displayed, whereas the material rows not having a curve have a null displayed.

Performing a Database Query, 17 to show only the materials which have a specific condition is fast and easy. Use an attribute from the property set and have it exist. For example:

E11T exists

This returns all the database rows where E11T exists and since E11T is part of the “PROPERTY” Property Set, 7, most of the “PROPERTY” property set rows exists. Another example is:

SIG11TvsEPS exists


24

This returns all the database rows where SIG11TVSEPS exists. Since SIG11TVSEPS is part of the “SIG11TVSEPS” property set, all of the “SIG11TVSEPS” property set rows exist that contain data, because curve property sets contain only one attribute, itself.

To determine which attributes belong to which property sets, use the attribute list from the Column Headers, 4, Query Attribute list or Mapping Template Attribute List. Select an attribute and the displayed attribute information indicates which property set the attribute is from. The property set name is represented by the name following the header Relation. For example:

Property Set Display

The selected Property Set, 7 displays the possible material data choices for the selected material type. This display is composed of the attributes which have more than one value for the material type. All attributes which have only a single value or no value are removed from the spreadsheet display so the material choices are smaller, making a decision is easier. The removed attributes display in the Material Application Selection Display, 28, display their selected values.

The spreadsheet display is similar to the Material Selection spreadsheet, with respect to the units row, data displayed, and selected cell data. The attributes display order is determined by their order in the database. The Pedigree, 7 attributes are listed first, then the source, and then the property sets attributes.

Curve property sets only have one attribute for the property set--the curve attribute. For example:

Property set SIG11TvsEPS11 displays its attribute values as <Curve>:SIG11TvsEPS11

This curve attribute contains curve data. The curve data is compared to determine if the curves are the same. If they are, the curve attributes are removed from the spreadsheet just like any other attribute. They can still be plotted by selecting any of the property set rows and pressing the Curve Options, 25 button.

Selecting a row updates the Material Application Selection Display, 28 window. All Pedigree, 7 values are overwritten with this selection. This occurs because each property set has a set of pedigree attribute values, some of which may be shared with the other property sets and some may not. This is because the

Relation: PROPERTYRelation: SIG11TVSEPS11Relation: MATERIAL


property sets come from a nonspecific material type which has several variations. Using the last selected property set’s pedigree values allows the user to determine which pedigree data to use.

Current Property Set SelectionsProperty Sets (p. 7) which only have a single data row or have a data row selected from the Property Set spreadsheet appear as rows in the Current Property Set Selections spreadsheet. The first column displays the property set name. It is followed by property set’s Pedigree, 7 attribute values. The pedigree attributes that are used are the ones displayed in the property set spreadsheet. This configuration is used to compare material types so that the property sets can be selected from the most similar material. This is needed because of the database’s structure and data content presents many material type variations. Not all material types contain the same property sets but it is possible to select a slightly different property set to complete the Properties Mapping, 29. Use this display when selecting a property set row so that the materials match as closely as possible.

Selecting a row from this panel redisplays the selected property set in the Property Set Display, 24. This makes it possible to change a previous property set selection.

The order of the displayed property sets is important because it determines which pedigree attribute values are used for the material creation. The top row is always used.

A Property Set, 7 is moved to the top row whenever it is currently displayed in the Property Set display and a row is selected. This indicates which property set the Pedigree, 7 attributes values are coming from. This is important because some property sets have Null, 7 values when other property sets have valid values for the pedigree attributes.

WARNING: Make sure the values are correct in the Material Application Selection Display, 28 before you create the material and fields.

Curve OptionsWhen a curves Property Set, 7 is selected and it has a selected row, either because the user selected one or because the property set contains only one row, then a curve is selected and it can be displayed using these functions.


26

Pressing the Plot button plots the selected row’s curve data and hides (unposts) all existing curves. The axis labels are set to the curve’s description plus the current unit system labels. It sets the curve name in the legend using the property set’s name, the Material Selection panel first column’s attribute value, and the selected property set row as the name.

Merge plot button adds the plot to the existing xy window. In doing so the system determines if the axis labels should be removed. It does this by comparing the curve names in the legend. It checks if the Property Sets (p. 7) name before the colon of all the plots currently displayed are the same as the one being plotted. If they are different then the system assumes the curves are different and the axis labels are removed. Also, merging a plot with the same name as another plot adds a suffix to differentiate between them.

Some curves are logarithmic so the axis display changes from linear to logarithmic scale.

Unpost window button hides the xy window when its been displayed using either plot or merge plot. To raise the xy window to the top, unpost the window and then plot or merge plot it. This displays the xy window on the top of the rest of the panels.


Create Material

The Create Material button creates a material with the mapped properties.

The Properties Mapping, 29 display in the Material Application Selection Display, 28 window. The mapped properties are selected when the material type is selected from Selecting Materials, 12 and when all the Property Sets (p. 7) have rows selected. If mapped property sets do not have rows selected, then a warning message is displayed. This is not an error but the mappings containing the attributes in the unselected property sets might not get values. It is possible though that an unselected property set attribute has only a single value for a material type. Then it doesn’t matter if the property set is selected or not, this value is used. Verify the data in the Material Application form’s display window before the Create Material button is pressed.

The material name must be provided before pressing Create Material. You enter the material name in the Materials Panel. It must be less than 32 characters and contain no invalid characters.

When the Create Material button is pressed a warning displays all empty, invalid or Null, 7 mapped properties. It is possible to cancel the create material process and restart the selection process. Any named Patran properties in the warning message do not receive values during the material creation process. When the material and fields are created the Materials Application form’s Existing Materials and Existing Fields lists are updated with the new items.

Fields, which are created from the curve Property Set, 7, are attached to the material. They are created from the curve points in a MSC Mvision figure, as long as the curve points do not overlap on the x axis. If they do, then only the first set of curve points is used to create the field.

The field name is created from the material name and the mapped MSC Mvision attribute name. The name is built by concatenating the material name with an underscore and the attribute name. If the name is greater than 31 characters, the material name and attribute name are truncated to fit the limit. For example:

When the material is created, a description is created that describes the material’s origin. It is composed of the time, date, database name, any modified mapping values, the pedigree and source attributes and values used as column headers, the property set attributes found in the displays and their values for the selection. For example:

Date: 26-Oct-93

Material name: STAINLESS_STEELAttribute: SIG11TvsTEMPField name: STAINLESS_STEEL_SIG11TvsTEMP


28

Time: 13:39:24<installation_directory>/mvision/pmc90.des Database values: DESIG = T300/F178, CNAME = Graphite/Polyimide, FIBER = T300, MATRIX = F178 PROPERTY: TEMP = 350 deg F, HUMID = 1. 0

Material Application Selection DisplayThe material selection displays in two formats: Mapped Properties and Database Attributes.

The Mapped Properties option displays the current analysis properties which are mapped to MSC Mvision database attributes and Expressions, 4. This display updates with each selection making it possible to see the properties and their values as the selections take place. This list contains every mapped property from all the analysis codes. It consists of the analysis code property label, the database mapping and underneath it is the value and the attribute units. When the material and the fields are created, these values are used as the material properties and field names.

The Database Attributes options displays the non-Null, 7 attributes for the current material selection. It displays the column headers and their values for the current selection when the Materials Selection form displays. When the Property Set, 7 Selection form is active, this window displays all non-null attribute values that have a single value for the current selections. This means that when the Property Set Selection, 20 displays, any attribute which has only one value for the selected material is displayed here. This is because, no matter what property set selection occurs, the value is still the same. All other values display when the property sets have rows selected for them.


Properties MappingEach material property stored in an MSC Mvision database is identified by an attribute name. These attribute names are defined at the time the database is built. In order for the Materials Selector to make these material properties available for Patran to use, it is necessary to define a correspondence between the Patran material properties needed for analysis and the attributes in each database. This is called Database Attributes Mapping and the mapping for a database is stored in the Database Template.

To change the database mapping, select the Properties Mapping button on the Materials Application form. This activates the Mapping Database Attributes form as shown in the next illustration.

The form is dominated by a page scrolled window of Patran analysis code properties. The list of properties depends upon which material model was selected when the database was opened. The above form is for an isotropic material. If an orthotropic material was being created, the list of properties would be different and would include properties in the different directions for that type of material.

The analysis code property labels display according to the option menu setting. It defaults to the current analysis code but may be changed to view any of the analysis codes or all of them at once. Some analysis codes could be grayed out because they are not available under the current material model.


30

Next to each analysis code property label are two boxes. The first box is for the MSC Mvision database attribute; the second shows the attribute’s value for the selected material. Depending on the type of mapping, the value box options change. If the mapping is a scalar mapping then the value box is followed by two numbers. The numbers are statistics about the database and can be set by the user. At the top of the column is an option menu which allows you to set the statistic to the minimum/maximum number of entries or units for that attribute. If the mapping is a curve, then the value box is followed by a independent variable option menu. You can specify one of five different independent variable types. These include:

TemperatureStrainStrain RateTimeFrequency

The statistical data is not available for curve mappings.

The scalar mapping can have their values manually entered into the value box, but the curve mappings value box is read-only because the system generates a Create Material, 27 automatically.

If you have opened a database that has a template, you will see that the Database Attribute column contains the names of database attributes or expressions. If a material is selected, you will see values in the Value column. But, if you are viewing a database that does not have a template, these columns will be empty.

To change the mapping or to create new mappings, pick the Database Attribute box next to any of the Patran Labels. If you know the corresponding database attribute name, you may type the name. Typically, you need some assistance with the database attribute names. The Attribute List… button at the top of the form activates a form that lists the database attributes and their definition.The currently selected Patran Label is listed at the bottom of the form. When you pick from this list, the attribute is entered in the Attribute textbox at the bottom of the form and the Database Attribute box on the Mapping Database Attributes form.

Any scalar mapping can be an attribute or an expression. These must be keyed manually into the Database Attribute box. See Expressions, 4 for a complete listing of valid database expressions.

Database Mapping TemplatesThe Materials Selector is designed to provide a quick and simple interface for reading MSC Mvision materials databases. These databases can have a wide range of materials properties and hierarchical organizations. To provide a simple method of viewing the materials data, the Materials Selector uses a template to organize the materials data for easy use within Patran. MSc.Software Corporation provides templates for all MSC databanks. You can make new templates or modify existing templates for new mappings of MSC databanks or user-created databases.

Note: Templates are retrieved and saved via the Database Attributes Mapping form. The Mapping Templates button at the top of the form activates the Database Templates form. See Database Mapping Templates, 30 for more information.


Templates store the following display characteristics for the Materials Selector:

Database templates are stored separately from their associated database. Each is named after the database with a suffix noting the associated Patran material type. For format of the template names, see Naming Format for Database Mapping Templates, 31.

Naming Format for Database Mapping TemplatesDatabase Mapping Templates use the following naming convention:

<database>.<Patran_material_type>.mvtm

The parts of the name are defined as follows:

When a database is opened, the Materials Selector checks the selected Patran material type and searches for a template that matches. For example, if you were opening the MIL-HDBK-5 database (mil5f.des) to find an isotropic material, the Materials Selector would look for a template with the name

Column Headers These are the attributes used to select information from the database for display on the Materials Selector form.

Property Mappings The assignment of Patran property labels to database attributes. Each database has its own mappings since each database can use different attribute names for the same material property.

Query Commands The query is very useful in trimming a database down to a specific set of materials.

Unit System Typical unit system that the user normally works in.

database Name of the target database.<P3 ⁄Patran_material_type> Name of the target Patran Material type. The following

abbreviations are employed:iso

ortho2d

ortho3d

comp

aniso2d

aniso3d

newtfluid

Isotropic

Orthotropic in two dimensions

Orthotropic in three dimensions

Composite

Anisotropic in two dimensions

Anisotropic in three dimensions

Newtonian Fluidmvtm Suffix for all MSC Mvision database templates.


32

mil5f.iso.mvtm. No error message is issued if the Materials Selector does not find a template with that name. The Materials Selector opens the database and displays the highest relation’s attributes from the MSC Mvision database hierarchy.

If you are creating templates for your own MSC Mvision databases, you will need to follow this same naming convention.

MSC Mvision Database Units The properties in MSC Mvision Databanks are stored in a particular system of units. The creator of the databank selects this default system of units at the time the databank is initially constructed.1 It is possible to view the databank in a different system of unit via the Materials Application Form, 43 button on the Materials form. This button uses a special file called MVISION.UNT to make the conversion.

The MVISION.UNT file contains information required to convert the database from one system of units to another. Specifically, the file contains conversion factors to change specified real number attributes from the default database units to those of an alternate unit system.

A sample units file is given in Figure 1-1. This example is taken from the MVISION.UNT file supplied with the MSC Mvision databanks.

Figure 1-1 Sample MVISION.UNT Units File

1 All of the MSC supplied databanks use English units of pound, foot, and seconds.


The first entry is the name of the alternate units system. The entry has the following format:

DB Other_name

Where DB marks the line as a new system of units and Other_name is the name of the system of units. In the figure above, there are two systems of units defined, SI and Patran.

The conversions follow on succeeding lines. The format of the conversion is:

Property New_units multiplier[,offset]

Where Property is the name database attribute. Partial names are allowed which provides for simplification of the units file. Partial names are discussed in more detail below. New_units is the name units. Multiplier and offset are numbers used in the following equation to obtain the new value:

New_value = Database_value * multiplier + offset

The conversion line in Figure 1-1 starting with YS means that YS (yield strengths) are to be changed from the default database units of ksi to MPa (MegaPascals) by multiplying the numbers on the database by 6.8947572. This example uses a non-unique name to apply the conversion to all database attributes that begin with YS.

There is no format for the file. The rules are:

1. The Property name cannot have embedded blanks. 2. Non-unique abbreviated Property names are allowed. Place abbreviations after longer more

unique names (e.g., E for several different types of modulus with the same units and EPS for strain), place the longer string first, as above.

3. Abbreviations match attribute names only if the character following the abbreviation is a non-letter. For example, if the abbreviation is E, it would match E_T and E11T but not EPS.

4. The New_units name must start with an alphabetic character. It can have embedded blanks. 5. The multiplier and offset cannot have embedded blanks. 6. The offset is optional (default = 0.0) and is separated from the multiplier by a comma. 7. Up to five different systems can be defined in a single MVISION.UNT file. 8. Comment lines start with a “$” in column 1 and can be put anywhere.

Include unitless items such as SIG_RATIO with “-” for units and 1.0 for multiplier to prevent inadvertent conversion by the entry for stress terms specified by the substring SIG. See Figure 1-1.


34

Chapter 2: Patran Materials FormsPatran Materials Enterprise

2 Patran Materials Forms

Materials Selector 36

Using Materials Selector 37

Open Materials Database Form 38

Materials Selector Form 39

Materials Application Form 43

Query Panel 44

Property Set Selection 45

Mapping MSC Mvision Attributes to Patran Material Properties 47

Mapping Templates 50

Patran Materials EnterpriseMaterials Selector

36

Materials Selector The Patran Materials provides a convenient environment for materials selection and a traceable electronic link between MSC Mvis ion materials databanks and Patran. The Patran Materials is specially designed to forge a link between analysis and materials specialists.

MSC Mvis ion is MSC’s materials database system. MSC Mvision databases can store materials information such as physical properties, processing parameters, usage notes, and test conditions. Patran Materials is designed to provide the analyst with access to materials properties defined and stored in MSC Mvis ion databases by materials specialists.

The Patran analyst can choose the material attributes of interest (i.e., name, strength, heat treatment, stiffness, etc.) and is presented with a list of available choices from the materials database. If selecting from this list identifies a unique material in the database, then the properties from the selected material are transferred to the Materials form. If the selection is not unique, the Materials Selector presents you with a list of all materials that match the selection criteria. Pick from this list to load the material properties of a single material into the Materials form.

The Patran Materials forms are outlined in the selection below.

Form Name DescriptionMaterials Selector Databases

Database file selection to open MSC Mvision Databases.

Materials Selector Main material selection form. Provides first view of the materials in a database based upon the default selected attributes.

Materials Displays the current materials and fields. Changes units and shows the selected material’s properties in both Patran and MSC Mvis ion formats.

Query Panel Construction form for creating valid database query commands.Column Headers Selects attributes displayed on the Material form.Property Sets Completes the initial material selection so that a a single material is

selected. Also allows plotting of curve data.Database Attribute Mapping

Sets the database attribute mapping between the MSC Mvis ion database and Patran.

Attribute List Lists the database attributes and definitions for use in completing the Database Attributes Mapping form.

Mapping Templates Used to recall and save Database Mapping Templates.

37Chapter 2: Patran Materials FormsUsing Materials Selector

Using Materials Selector The Materials Selector is designed to simplify materials selection. The following flow chart shows the options available in selecting materials from an MSC Mvision database.

Patran Materials EnterpriseOpen Materials Database Form

38

Open Materials Database FormThe Materials Selector Database form shown below provides the following options for opening an MSC Mvision Materials Database.

Note: In this illustration, the directory /mvision has no subdirectories. The /. and /.. are special directory pointers. /. is a pointer to the current directory and /.. is a pointer to the previous directory (jones). To move up to the /jones directory click on /.. and pick Filter or click twice on the /.. directory.

39Chapter 2: Patran Materials FormsMaterials Selector Form

Materials Selector FormThe Materials Selector form, shown below, displays materials information from the current MSC Mvision database and provides the following functions for accessing the materials information.

Materials Selector SpreadsheetThe main part of the Materials Selector form is the spreadsheet-like area dominating its middle. This is your first look at the MSC Mvision database and is called the Materials List. Its features are described below.

Patran Materials EnterpriseMaterials Selector Form

40

Query Command TextboxThe Query is a database command that limits the materials used by the Materials Selector. Queries can be typed in the Query Command textbox or you can pick the Query button to get a special form that will assist in the creation of a valid query.

41Chapter 2: Patran Materials FormsMaterials Selector Form

Column Headers FormThe Select Attributes List is placed on the Materials form and assigns MSC Mvision database attributes to the columns of the Materials List. The Materials List extracts these selected attributes from the current database.

Note: If you wish to clear the query condition on the database, first clear the Query Command textbox and then pick Apply.

Patran Materials EnterpriseMaterials Selector Form

42

43Chapter 2: Patran Materials FormsMaterials Application Form

Materials Application FormThe Materials form as shown below has the following functions.

Patran Materials EnterpriseQuery Panel

44

Query PanelThe Query Panel is a special form for constructing a database Query. It has the following features.

45Chapter 2: Patran Materials FormsProperty Set Selection

Property Set SelectionThe Property Set form is used to select the individual property set data for the selected material type. This data is the primary source for the mapped properties.

Patran Materials EnterpriseProperty Set Selection

46

47Chapter 2: Patran Materials FormsMapping MSC Mvision Attributes to Patran Material Properties

Mapping MSC Mvision Attributes to Patran Material PropertiesThe Database Attributes Mapping form displays the assignments of MSC Mvision attributes to Patran material properties and allows modification to those assignments. The following example shows the mapping for an isotropic material using the Patran FEA property labels.

Patran Materials EnterpriseMapping MSC Mvision Attributes to Patran Material Properties

48

Attribute ListThe Attribute List is placed on the Materials form and is used in conjunction with the Database Attributes Mapping form as an aid for matching Patran property names with MSC Mvis ion database attributes.

49Chapter 2: Patran Materials FormsMapping MSC Mvision Attributes to Patran Material Properties

Patran Materials EnterpriseMapping Templates

50

Mapping TemplatesMapping Templates contain display and attribute mapping for specific MSC Mvision databases. When you open an MSC Mvis ion database, the Materials Selector opens a corresponding database template. The template contains the attribute information used on the Select Attributes form and the Mapping Attributes form. You may modify the template and save it or call a new template by picking Mapping Template from the Mapping MSC Mvision Attributes to Patran Material Properties, 47 form. The Mapping Template File Option form is shown below.

Open Mapping TemplatesThe Open Mapping Template form reads in a new database template. These templates are associated with specific MSC Mvision databases and establish default mappings between the MSC Mvis ion database and Patran.

51Chapter 2: Patran Materials FormsMapping Templates

Save As Mapping TemplatesThe Save As Mapping Templates form saves the current database mapping templates with a new name.

Note: In this illustration, the directory /mvision has no subdirectories. The /. and /.. are special directory pointers. /. is a pointer to the current directory and /.. is a pointer to the previous directory (jones). To move up to the /patran3 directory click on /.. and pick Filter or click twice on the /.. directory.

Patran Materials EnterpriseMapping Templates

52

Note: In this illustration, the directory /mvision has no subdirectories. The /. and /.. are special directory pointers. /. is a pointer to the current directory and /.. is a pointer to the previous directory (/patran3). To move up to the /jones directory click on /.. and pick Filter or click twice on the /.. directory.

MSC.Fatigue Quick Start Guide

I n d e xMSC Patran Materials Enterprise

INDEX

Index

Aattribute, 4attribute list, 48auto execute, 14

Ccolumn headers, 4, 15, 16, 31

change, 16create material button, 27current property set selections, 25curves, 25

logarithmic, 26

DData, documenting source of material, 70databank, 4database, 3, 4

opening, 31statistics, 30units, 32

database attributes, 28database attributes mapping, 29, 47database mapping template, 30, 31

changing, 30naming convention, 31saving, 30suffix, 31

database template, 29Documenting source of data, 70

EEnvironment variables, 55

expressionabs, 6acos, 6asin, 6atan, 6ceil, 6cos, 6cosh, 6degtorad, 6erf, 6exp, 6floor, 6if, 6interp_x, 6interp_y, 6log, 6log10, 6nvl, 6radtodeg, 6round, 6sin, 6sinh, 6sqrt, 6tan, 7tanh, 7trunc, 7

expressions, 4

Ffigures, 5

GGUI

overview of, 55

IIntegrated Client

GUI, overview of, 55

MSC.Fatigue Quick Start Guide

I n d e xMSC Patran Materials Enterprise

Mmapped properties, 28mapping, 7mapping templates, 50Material

documenting source of, 70Material browser frame, about, 60Material frame, about, 63materials application form, 43materials selector, 12materials selector database form, 38materials selector form, 39merge button, 26MIL_HDBK-17, 2MIL_HDBK-5, 2MSC_SDM_IC_PROPERTIES_FILE

environment variable, 55

Nnull, 7

Oopen database, 11open mapping template, 50

Ppedigree, 4pedigree attributes, 7plot button, 26PMC90, 2Points

curve points, 5runout points, 5scatter points, 5

producers databanks, 2property set, 4, 7property set form, 45property set selection, 20

Qquery, 3, 8, 17, 31, 40query box, 13query command, 13, 40query panel, 19, 44

Rrelation, 8

Ssave as mapping templates, 51scheme, 13selected cell data, 14SQL, 18standard databanks, 2Structural Query Language (SQL), 18

Ttemplate, 8template files, 3

Uuniquing, 9unit, 31units, 14unpost window, 26

Patran 2008 r1 Materials User's Guide

Documents

Transcript of Patran 2008 r1 Materials User's Guide