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Setting up custom USERMAT

 

ANSYS User Programmable Features (allow) users to use custom material model in their analysis. For example, users can provide their own material jacobian matrix (ddS/ddE) via usermat.F. 

However, to get started one needs to properly setup the development environment. Here is the proper procedure for a successful setup for usermat.

Installation

To compile usermat and other custom UPFs, one must have the necessary compilers. Make sure you have the correct Intel Compiler from their website (usually free for academia) and Visual Studio. 

For ANSYS 2020 R1, the version required are listed. The installation has to follow this order:

1. Install Visual Studio 2017 (default customization work)

2. Intel C++/Fortran Compiler 19.0 Update 3

The order matters because Intel installation sets up appropriate environment within Visual Studio.


Setting UPF

The following environment variables need to be setup to include the correct path to the directory containing UserMatLib.dll.

ANS_USER_PATH

In CMD prompt:    
setx ANS_USER_PATH <path to folder>

Additionally, add %ANS_USER_PATH% to the PATH environment variable.

In CMD prompt: 
setx PATH "%ANS_USER_PATH%;%PATH%"
 

Usage

Once setup, it can be activated in APDL/Mechanical via Commands snippet using:
tb,user,matid,1,nProps



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