1-1 ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved. February 27, 2009 Inventory # Chapter 3 Engineering Data ANSYS Explicit Dynamics

Engineering Data 1-2 ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved. February 27, 2009 Inventory # Training Manual Engineering Data The Engineering Data application provides overall control for material properties. – Engineering data is a part of every project. – Engineering data can be opened “stand alone” (as a precursor to starting a project for example). To edit the Engineering Data in an existing project RMB > Edit or double click To open the Engineering Data standalone, add from the component systems in the toolbox (drag/drop or double click), then RMB > Edit or double click.

Engineering Data 1-3 ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved. February 27, 2009 Inventory # Training Manual Engineering Data The Engineering Data application is displayed below. Individual controls and components are described next. Toolbox Property Chart Properties for material selected below Properties of material selected above Outline of “Filtered” Materials Outline Filter

Engineering Data 1-4 ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved. February 27, 2009 Inventory # Training Manual... Engineering Data The window interaction provides cascading data presentation. To view or modify materials one generally follows a work flow shown here: data source > material > individual property Choose Data Source (Library) Choose Material Choose Property Display Property in tabular and graphical format

Engineering Data 1-5 ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved. February 27, 2009 Inventory # Training Manual... Engineering Data A list of available material libraries is displayed. These may be ANSYS supplied or user defined. The Engineering Data field represents the list of materials which have been imported for use in the current project Favorites are materials which will be available in every project without the need to import from a library. Check box allows library to be unlocked for editing. Browse for existing libraries or choose new library location. Outline Filter

Engineering Data 1-6 ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved. February 27, 2009 Inventory # Training Manual... Engineering Data The toolbox provides numerous material property definitions that can be added to existing or new materials. To modify materials in existing libraries the library must be unlocked, (note this permanently modifies the material stored in that library). Materials in the current project’s engineering data can be modified without affecting the material library. The Toolbox Customization settings allows filtering of the properties displayed in the toolbox.

Engineering Data 1-7 ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved. February 27, 2009 Inventory # Training Manual... Engineering Data To add a material from an existing library to the current project click the plus sign (+) next to that material (or drag and drop the material to “Engineering Data”) Any material defined in the current project will be marked as show at right. Once “added” each material becomes available for use in the current project (it becomes part of the current “Engineering Data”). Note, to add a material to the “Favorites” list, RMB the material and add.

Engineering Data 1-8 ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved. February 27, 2009 Inventory # Training Manual... Engineering Data To add a new material, first select where you want the material data to be stored – Note, materials need not be stored in a library but can be added to the current project by storing in Engineering Data. Next provide a name for the material and begin adding components and properties from the Toolbox.

Engineering Data 1-9 ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved. February 27, 2009 Inventory # Training Manual Material Models for Explicit Dynamics Material model components are broken into categories User can choose components from each category, as required If a selected component is dependant on physical parameters, they will also be selected automatically If a selected component precludes components selected earlier, those components will be automatically suppressed – If you want them removed, you must do this manually

Engineering Data 1-10 ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved. February 27, 2009 Inventory # Training Manual Libraries for Explicit Dynamics Engineering Data provides two libraries containing data suitable for Explicit Dynamics – Explicit Materials Contains a wide range of materials generally used in non-linear explicit analyses – Models cannot be used for implicit analyses (e.g. pre- stressing) – General Non-linear Materials Contains basic material data for non-linear analysis. – Common engineering materials – Suitable for use in implicit and explicit analyses

Engineering Data 1-11 ANSYS, Inc. Proprietary © 2009 ANSYS, Inc. All rights reserved. February 27, 2009 Inventory # Training Manual Material Models for Explicit Dynamics Material data input example 1.Under “Linear Elastic”, select “Isotropic Elasticity” Physical property “Density” is automatically added (required for all models) 2.Under “Plasticity”, select “Bilinear Isotropic Hardening” 3.Under “Plasticity”, select “Johnson Cook Strength” “Bilinear Isotropic Hardening” is automatically suppressed Physical property “Specific Heat” is automatically added (required for thermal softening term)