ABAQUS/Explicit has an interface that allows you to implement general constitutive equations. In ABAQUS/Explicit the user-defined material model is implemented in user subroutine VUMAT. Use VUMAT when none of the existing material models included in the ABAQUS/Explicit material library accurately represents the behavior of the material to be modeled.

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  1. Voyiadjis, George Z.; Abed, Farid H.: A coupled temperature and strain rate dependent yield function for dynamic deformations of bcc metals (2006)