Using multiple subroutines

We can have more than one Abaqus subroutine in one file. Abaqus himself will call both subroutines wherever and whenever it needs during analysis.

For example, if you are writing a UMAT and a USDFLD, your Fortran file will have such a structure:

Remember that a given user subroutine (such as UMAT or USDFLD) should appear only once in the specified user subroutine source.

See Also:

Training Package: Introduction to UMAT and VUMAT Subroutines

Q&A: What are specific internal energy and dissipated inelastic specific energy? Can they affect VUMAT results? 

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