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Abaqus 6.13-1 Abaqus VUMAT

deformation gradeint in VUMAT Abaqus Explicit subroutine

Tue, 2016-03-15 18:19 - a.sethi
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Abaqus 6.13-1 Abaqus VUMAT
Material modelling
User subroutines in ABAQUS

Hello everyone,

I'm modelling VUMAT for a composite. So, in my model I have inotropic and anisotropic behaviour. I have modelled isotropic behaviour but for anisotropic behaviour I need to use deformation gradient, which is causing errors. CAN ANYONE HELP with DEFORMATION GRADIENT. How to use that, do we need to rotate stress back in corotational form as abaqus manual says if yes then How?

How can we get Rotation matrix in VUMAT, if we can multiply it with stretch I think we have the result. May be an alternative.....

Please help, stuck badly :(

 

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VUMAT Subroutines for multi-phase material behavior.

Wed, 2014-09-03 06:27 - simumano
research
Abaqus 6.13-1 Abaqus VUMAT

Hi everyone. I would like to know how to get started with a VUMAT subroutine for multiphases for example a subroutine for pore water and sand. It could be helpful when anyone could share VUMAT subroutines for learning such complex programmings. Could be appreciated when some one teaches with equations. thank you.

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