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Jacobian matrix DDSDDE- UMAT

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Lemine

Lemine

Mechanical
Joined
Apr 15, 2020
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45
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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?
constitutive-law_zjvqke.jpg


Thanks in advance
 
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