Lack of Correlation between ABAQUS defined Al and VUMAT coded AL [Archive] - PolymerFEM Forums

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Mechmindful

2007-11-19, 17:34

I am having trouble obtaining any reasonable correlation between the Abaqus *Elastic option and the very simple Isotropic Isothermal Elasticity VUMAT included in the "Writing User Subroutines in Abaqus" manual purchased from the ABAQUS website. Does anyone have a working Isotropic Isothermal Elasticity VUMAT code example? Are there any specific tricks you need when using the VUMAT? I am at my wits end here.

Thanks for your time.

Jorgen

2007-11-22, 16:52

Hmm, I don't know if I have a VUMAT for the linear elastic model. I wrote one for the neo-Hookean model that you can get on this page (http://polymerfem.com/forums/showthread.php?t=42).

One comment is that the linear elastic model typically works best when you calculate the stresses based on the previous stress and the strain increments.

- Jorgen