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Constitutive law for linear elastic isotropic material in large deformation

Posted Apr 15, 2010, 7:19 a.m. EDT 1 Reply

Dominique Pioletti
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I was not able to identify the constitutive law used for solid linear elastic isotropic material when the large deformation option is selected.

Is it the Kirchhoff-St. Venant law: Sx=(lambda)trE I + 2(mu)E
where Sx is the Piola-Kirchhoff II stress tensor, E is the Green strain, I the identity tensor and lambda and mu the Lamé constants?

Thanks.

Dominique
1 Reply Last Post Apr 16, 2010, 7:39 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 Apr 16, 2010, 7:39 a.m. EDT
Hi

I beleive the best reply is in the doc is like here:

page 7 SMEUG.pdf V3.5a as well as p165 and on, 173 and on

note some limitation with viscuoelastic material model

check also the smeref.pdf "large deformations" for the different application modes

good luck
Ivar
Hi I beleive the best reply is in the doc is like here: page 7 SMEUG.pdf V3.5a as well as p165 and on, 173 and on note some limitation with viscuoelastic material model check also the smeref.pdf "large deformations" for the different application modes good luck Ivar

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