Hi everybody,

i am new in the field of simulating elastomeres in FEM. I have found some information about how to determine/measure my invariants to fill the mooney rivlin model.

But i still dont understand where i get the C1...C11 from.

My formula:

W= C10(I1-3)+ C1(I2-3)+ C11 (I1-3)(I2-3)+ C20(I1-3)+C30(I1-3)

in the literature it says that i can neglect some coefficients so i get:

W= C10(I1-3)+ C1(I2-3)+ C11 (I1-3)(I2-3)

I read some threads but i couldnt find something that gives me enough information to solve the problem!

Thanks for your help!

dave