User Guide to a Wrapper That Allows a Custom User-Defined Material Model (UMAT) Originally Developed for Abaqus/EPIC to be Used in LS-DYNA Simulations
Abstract
Commercial codes such as LS-DYNA and Abaqus have many different types of built-in material models to simulate different types of materials. They also provide an option for the user to implement custom user-defined material models (user-mats). This is a powerful option for researchers simulating advanced materials for which there are not yet any suitable established models. However, the different commercial codes have substantially different interfaces for implementing user-mats. These differences preclude the user-mats from being able to be interchanged between codes as-is. Here, a user guide is provided for a wrapper we developed in order to use, in LS-DYNA simulations, a user-mat that was originally developed for Abaqus. The present wrapper had been developed as part of our recently published computational framework for simulating ultra-high-molecular-weight polyethylene film-based composites. One of the material models we used was originally implemented as an Abaqus UMAT. We developed the present wrapper in order to use the Abaqus UMAT in our LS-DYNA simulations. This user guide includes stepwise directions for using the wrapper, clearly indicating the specific cases for which it can be used in its present form and what additions would be needed for more generalized cases.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 30, 2023
- Accession Number
- AD1214015
Entities
People
- Richard Becker
- Stephen L. Alexander
- Tusit Weerasooriya
Organizations
- United States Army Research Laboratory