User-defined mechanical material behavior

User-defined mechanical material behavior in Abaqus:

  • is provided by means of an interface whereby any mechanical constitutive model can be added to the library;

  • requires that a constitutive model (or a library of models) is programmed in user subroutine UMAT (Abaqus/Standard) or VUMAT (Abaqus/Explicit); and

  • requires considerable effort and expertise: the feature is very general and powerful, but its use is not a routine exercise.

The following topics are discussed:

Related Topics
In Other Guides
Specifying solution-dependent state variables
Defining constants for a user material