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abaqus xfem umat

Problem with UMAT and XFEM

Submitted by Laerth on
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Hi all!

I try to simulate crack propagation using subroutine UMAT and XFEM, but I can't fix the error

***ERROR: THE PENALTY STIFFNESS HAS TO BE PROVIDED BY USING *SURFACE 

           BEHAVIOR,PRESSURE-OVERCLOSURE=LINEAR OR *SURFACE BEHAVIOR,AUGMENTED 

           LAGRANGE WHEN USER MATERIAL IS USED FOR A CRACK PROPAGATION ANALYSIS 

           WITH XFEM

 although I define *Surface behavior in .inp file: