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Arbitrary constitutive model

Posted May 23, 2011, 11:39 p.m. EDT Version 3.5a 3 Replies

Debaditya Dutta
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Hi,

I am wondering if it is possible to model a material with arbitrary constitutive relationship in the structural mechanics module. For example, if I want to model a material whose stress matrix depends on the strain matrix in an arbitrary way, how do I specify that dependence?

Thanks in advance for any help.

Regards,
Deb
3 Replies Last Post May 30, 2011, 1:11 a.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago May 24, 2011, 1:29 a.m. EDT
Hi

but isn't that the definition of an anisotropic material with a D tensor instead of scalar E and nu modulus

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Good luck
Ivar
Hi but isn't that the definition of an anisotropic material with a D tensor instead of scalar E and nu modulus -- Good luck Ivar
Debaditya Dutta
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Posted: 1 decade ago May 26, 2011, 11:30 a.m. EDT
Thanks, Ivar. Yes, I can do that. But it would be simpler if I could model the material using a strain energy function. Do you think COMSOL allows us to write the constitutive equation in terms of a strain energy function?

Thanks,
Deb
Thanks, Ivar. Yes, I can do that. But it would be simpler if I could model the material using a strain energy function. Do you think COMSOL allows us to write the constitutive equation in terms of a strain energy function? Thanks, Deb
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago May 30, 2011, 1:11 a.m. EDT
Hi

check the doc for the different material properties, there are other than just the "linear elastic"

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Good luck
Ivar
Hi check the doc for the different material properties, there are other than just the "linear elastic" -- Good luck Ivar

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