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WhatDifference:same stress-strain curve for linear elastic material with nonlinear young's modulus and hyperelastic materialSubmitted by XiaogaiLi on Fri, 2009-04-03 14:31.
Now I am trying to implement Ogden model in Comsol Multiphysics, but I had some problem.
Then I realized that in Comsol, it's possible to implement a nonlinear young's modulus.
But I am a little confused.
If you have a nonlinear Young's modulus, in the stress-strain curve, E is the tangent of this curve.
For hyperelastic material, let's say Ogden material. It's usually a nonlinear stress-strain curve as well.
My problem is, even if you can get some function for E young's modulus for the linear elastic material, and this stress-strain curve can be fitted to Ogden stress-strain curve in order to get the same shape of curve.