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stress tensor in nonlinear elastic material

Posted Nov 21, 2017, 12:18 p.m. EST Structural Mechanics 2 Replies

Sherry
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Hi all Could you please tell me how can I enter the prestress tensor in the case of nonlinear elastic material. Since in this case, there is no initial stress and strain option available.

Thanks

2 Replies Last Post Nov 22, 2017, 5:07 a.m. EST
Henrik Sönnerlind COMSOL Employee

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Posted: 6 years ago Nov 21, 2017, 2:41 p.m. EST

Hi,

As far as I remember, the Nonlinear Elastic Material has had an Initial Stress and Strain subnode ever since it was introduced (in version 5.0). Which version are you using?

Regards,

Henrik

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Henrik Sönnerlind
COMSOL
Hi, As far as I remember, the Nonlinear Elastic Material has had an Initial Stress and Strain subnode ever since it was introduced (in version 5.0). Which version are you using? Regards, Henrik
Sherry
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Posted: 6 years ago Nov 22, 2017, 5:07 a.m. EST

Hi Henrik,

Yes, you're right. It was better to say Hyperelastic materials. In fact, I have modeled a hyperelastic material with external stress-strain relation in Comsol 5.3. Then I have loaded it. Now I want to use its stress tensor in other study step. How can I do it?

Thanks Best regards,

Hi Henrik, Yes, you're right. It was better to say Hyperelastic materials. In fact, I have modeled a hyperelastic material with external stress-strain relation in Comsol 5.3. Then I have loaded it. Now I want to use its stress tensor in other study step. How can I do it? Thanks Best regards,

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