Jacobian matrix DDSDDE- UMAT

[Lemine]

Hello everyone,

Can anyone help me to obtain the tangent matrix of this behavior law (to use in UMAT subroutine) and il would be so thankful?

Thanks in advance

 

[swimfar]

This question is definitely a better fit for the FEA forum. Also, it would help if you were to provide more information on the constitutive model. What is it modeling? What is "L"? Where did you get this equation from?

Someone might recognize the equation and be able to give you an answer right away. But the more information that you provide, the better chance you'll get an answer, and the better chance that the answer is correct.

 

[IRstuff]

Please refrain from double posting; you've posted the same question at least 5 times

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

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