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TarletonGroup / CrystalPlasticity

CP UMAT and CZM UEL for Abaqus
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Question about C3D8R #61

Closed xiamucp closed 4 months ago

xiamucp commented 4 months ago

Dear Eralp, I am deeply grateful for your sharing code, which provides lots of help for our crystal plasticity research.

I have developed a finite element model with C3D8R element, and it works well with UMAT V2.7. But it failed with UMAT v2.20, which shows severe small DFGRD1 and not converge in the first increment. Would there be a need to give necessary change in meshprop?

Thank you for your suggestions！

Best regards, Chen

EralpDemir commented 4 months ago

Hi Chen,

I have tested the latest version on Github with a C3D8R element.

I entered a small value for the hourglass stiffness. It works. Sending the INP file in the attached.

GND model does not work for this type element.

C3D8R.zip

Hope this helps, Eralp