Modeling closed cell foam -- what are the a, b, c. constants and intial presre

[Khan126]

Dear All,

I want to use closed cell foam model in Ansys-LS Dyna. I don't know about the physical meaning and values of a, b, c constants and also value for the initial foam pressure. Any help in finding this data will be highly appreciated.

Regards

Khan

[Jorgen]

What is the LS-DYNA name/number for that material model?
Did you read the LS-DYNA documentation?
What material are you studying?

-Jorgen

[Khan126]

Thank you for your reply Jorgen, here are the details

Name of the Ansys material model is "Closed Cell Foam"
Number of the model is LS Dyna Material Model # 53 // http://www.kxcad.net/ansys/ANSYS/ansyshelp/Hlp_L_matlex1.html
The material i am using is Styrene Butadiene Rubber // http://en.wikipedia.org/wiki/Styrene-butadiene

Unfortunately there are no examples of this material model in Ansys LS Dyna Documentation.

Regards

Khan