In this video, you will learn how to create a model in Abaqus using the UMAT subroutine. UMAT allows you to define how a material responds to loading, including complex behaviors like anisotropy, nonlinear elasticity, or custom failure criteria.

Many users confuse UMAT with USDFLD. While USDFLD can be used to assign material properties based on field variables, UMAT is specifically used to define the full material behavior, including how stress evolves under loading.

If you’re trying to simulate advanced material behavior or implement a new constitutive model, UMAT is the right tool. This video will guide you through the basics using a simple example.