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Enforcing incompressibility in the strain energy of a hyperelastic material

Posted 14 juin 2011, 13:18 UTC−4 0 Replies

Jessica
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Hi,

I was wondering how incompressibility can be enforced for a hyperelastic material. I have run into these issues:

1- For a Neo-Hookean model, I changed the detF to 1 in Equation System. Interestingly, my material behaved incompressible withOUT this change too; i.e. the volume was conserved without setting detF=1, or if there was a change it was too tiny. This seems to be odd to me. How can this possible?

2- I tried some custom strain energy models and again set detF=1 in the Equation System, but the volume was not conserved.

I'd appreciate it if anyone can give a hint.

Thanks
J.W.
0 Replies Last Post 14 juin 2011, 13:18 UTC−4
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