Prerequisites for a solution to use a UMAT model

For a solution to use a user-defined material model, the following is required:

• A structural or coupled Simcenter 3D Multiphysics solution.

• Solution dialog box→Solution Control page→Structural Control group:Nonlinear Control Parameters→Create Modeling Object →Nonlinear Control Parameters dialog box→Plasticity and Creep Control page→Plasticity Effects (PLASTIC) and Creep Effects (CREEP) set to Yes.Note: PLASTIC and CREEP flags that are defined in the Simcenter Nastran NLCNTL card (and can vary from subcase to subcase), control whether the plastic and creep behavior are turned on or off.By default, the PLASTIC and CREEP flags are turned on in Simcenter Nastran. You must turn them off in Pre/Post, if you do not want to include the plasticity and creep effects in the solver calculation.Material Nonlinearity check box selected.

How do I

Sample UMAT XML file

Add UMAT property values to MatML Library material definitions (site MatML Library owner)

Define a material with a UMAT model from scratch

Define a material with a UMAT model from a standard library definition

Define configurable material properties (site MatML Library owner)

Modify configurable material properties (end user)

Export a material with a UMAT model

Define, specify, and plot state variables

Learn more

Simcenter Nastran user-defined material models

UMAT workflow

Simcenter Nastran UMAT subroutine

UMAT XML file

Submit solution to Simcenter Nastran

Look up more details

UMAT troubleshooting

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

Browse Simcenter 3D help by product area

Prerequisites for a solution to use a UMAT model, Simcenter 3D 2021.1 Series

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