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Convert UMAT to VUMAT

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Posts: 3
Topic starter
New Member
Joined: 9 years ago

Hi everybody,

I wrote an UMAT subroutine for modelling a constitutive model in abaqus.

Now, I need to write a VUMAT and i would like to convert my old UMAT in a new VUMAT

Please, are there anybody that could tell me the procedure to convert UMAT to VUMAT?

Thanks in advance

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Posts: 3998
Joined: 5 years ago

It is actually easy. You can use most of the same code, just remove the Jacobian calculation, and rewrite the code interface so it matches the VUMAT requirements.


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