UMAT for Gurson Tvergaard Needleman (GTN) model 2

[WillingToLearn]

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

 

[FEA way]

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.

 

[WillingToLearn]

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/SIMACAEMATRefMap/simamat-c-pormetalplas.htm)

 

[Hannahmf]

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