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UMAT for Gurson Tvergaard Needleman (GTN) model
2

thread1630-489572

UMAT for Gurson Tvergaard Needleman (GTN) model

UMAT for Gurson Tvergaard Needleman (GTN) model

(OP)
Hello everybody,

does someone have a UMAT code for Abaqus for the Gurson Tvergaard Needleman model for Abaqus and would be willing to share it?

I would like to use the model, but I am just getting started with Abaqus. It would be very helpful :)

Kind regards
Mike

RE: UMAT for Gurson Tvergaard Needleman (GTN) model

It might be hard to find the actual code of such subroutine as those usually aren’t shared anywhere (apart from master and Ph.D. theses - maybe that’s the way to go). However, research papers discussing the implementation of this model in Abaqus can be helpful as well - they provide the necessary equations and often also subroutine flowcharts.

RE: UMAT for Gurson Tvergaard Needleman (GTN) model

(OP)
Thank you very much. In the meantime this approach was successful.

But for anyone who just wants to use it: Abaqus has it already implement (I don't know, how I did overlook this for so long), though it is somewhat hidden: Porous Metal (https://abaqus-docs.mit.edu/2017/English/SIMACAEMA...)

RE: UMAT for Gurson Tvergaard Needleman (GTN) model

Hey @WillingToLearn your shared link was helpful for me. Thanks

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