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amar
@amar
Active Member
Joined: Aug 29, 2007
Last seen: Oct 1, 2019
Topics: 1 / Replies: 7
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I have been able to reduce the oscillations of the VUMAT output by avoiding the *variable mass scaling, and by changing the *density value only. I wou...

20 years ago
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I ran two simulations, one with umat, one with vumat for the same material model, with same boundary conditions. The results from the umat one showed ...

20 years ago
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Re: vumat validation

Re: vumat validation [quote=Jorgen_Bergstrom][imgp> [/quote] Dear Jorgen, Do you know why the stress-strain curves are not smooth for vumat 4x4x4 e...

20 years ago
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Hi Jorgen, Thanks for your reply! Do you have any reference on the finite difference approach and on how to implement it in FE? To approximate th...

20 years ago
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Hi All: Here is my 2 cents on the convergence issues: 1) As Stablguru mentioned, strain energy function needs to satisfy the ellipticity condition, ...

20 years ago
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Hi Jorgen, One more question related to the UMAT code of Neo-Hookean materal model. Can the DDSDDE be the elasticity tensor in spatial description de...

20 years ago
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Hi Jorgen, Thanks for the reply. You are right that for incompressible material S=2*((C10+C01*I1)*I-C01*C)+pC^(-1) ...

20 years ago
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Replies: 7
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