Hi, I have developed several UMATs before but this is my first time making ABAQUS VUMAT.
I read in manual that VUMAT has to be developed in vector architecture. Having said that, the manual says that no iteration, no conditional looping (looping must be unrolled), no branching. We need to make sure no external subroutines are called inside the loop and many other restrictions.
What if I need to develop a model that is so complicated that I cannot meet vector mode?
What happened if I violate those restrictions? will the calculated values still correct but my code gets slower? Does anyone have any experience with this issue?
Vector mode for VUMAT means that your constitutive model should be inside a loop for a specific block of integration points because it is called one time for many integration points in addition to UMAT that is called one time for each integration point. No matter how complicated the constitutive law is, there should be a way to vectorize the code. It is necessary for VUMAT to be in vector format in order to work.
Dear, Can you share any good tutorial for VUMAT. I am interested in BBC2005 failure criteria and ABAQUS does not have this criteria. my email is : [email protected]
Dear, Can you share any good tutorial for VUMAT. I am interested in BBC2005 failure criteria and ABAQUS does not have this criteria. my email is : [email protected]
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