Simcenter Samcef user-defined materials overview

The user-defined materials capability (also referred to as UMAT), lets you pass your own proprietary material models, such as elastic, plastic, and creep, to the Simcenter Samcef solver using a customization of the standard materials dialog box. You can also use the UMAT capability to enhance or override existing material models.

When you define a custom material model, the software writes the custom properties to the Simcenter Samcef input file. However, only your Simcenter Samcef UMAT subroutine performs the calculations for the custom properties. Your proprietary material calculations remain only in your subroutine.

In Pre/Post, your user-defined material model properties appear in the materials dialog boxes on a page named User Models - Simcenter Samcef.

The UMAT capability differs from the custom materials capability because material properties are proprietary in UMAT.

To define user-defined materials, you need to fulfill specific prerequisites. For more information, see Prerequisites for Simcenter Samcef user-defined materials.

Note:

The UMAT XML file and UMAT subroutine of the Simcenter Samcef environment are not compatible with the ones of the Simcenter Nastran environment.

Where do I find it?

Application	Pre/Post
Prerequisites	A FEM file, idealized part, or master model part as the work part and displayed partSimcenter Samcef as the solverXML file that describes the custom propertiesSimcenter Samcef UMAT subroutine
Command Finder	Manage Materials
Location in dialog box	Type list→Isotropic, Orthotropic, Anisotropic, or Damage Interface→Create →User Models - Simcenter Samcef page.

Learn more

Simcenter Samcef UMAT workflow

Simcenter Samcef UMAT subroutine

Simcenter Samcef UMAT XML file

Compiling the Simcenter Samcef UMAT subroutine

Prerequisites for Simcenter Samcef user-defined materials

Simcenter Samcef UMAT troubleshooting

Simcenter Samcef UMAT output requests and results

Simcenter Samcef UMAT export

Import of a Simcenter Samcef UMAT material

Define a Simcenter Samcef UMAT material

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

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Simcenter Samcef user-defined materials overview, Simcenter 3D 2021.1 Series

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