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UHYPER/UMAT Failure Model Help

UHYPER/UMAT Failure Model Help

UHYPER/UMAT Failure Model Help

(OP)
Hi Everyone,
I've been trying to write a simple sub routine which emulates the failure of a hyper elastic material under tension.

I was initially using UMAT but then read from the ABAQUS documentation that the use of UHYPER would be easier to implement a neo-hookean model (this is the model I'm currently using).

From the documentation provided on the sub routines I've been able to define the derivatives which they ask for, however I do not know(or see) of anyway to actually implement failure.

I've been suggested to somehow remove elements or set "failed" elements stresses to zero when It has reached a predetermined failure variable.

Any suggestions?
Thanks

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