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[b]Total volume ratio and Hyperfoam[/b]

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Valou

Valou

Mechanical
Joined
Apr 18, 2005
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6
Location
FR
I'm using a foam model with the strain energy function implemented in MARC. I've all the coefficients I need ( that is to say alpha_i , béta_i and mu_i).
I know that I can get the total volume ratio J, but I don't know how!!!

Does someone have an idea?
 
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