Silicone Material Model

[hbarea]

Does any body have experience modeling silicone parts in FEA? Would it best to use the Odgen or Mooney-Rivlin material model; or the Standard (Isotropic Linear Elastic) material model? Does anyone have correlated a silicone model with empirical data? Any publications I can consult in the subject?

 

[brad]

Ogden and Mooney-Rivlin (along with all of the other hyperelastic models) are merely abstractions used to describe the material. Given that, the "best" is the one which provides the response which is most similar to your particular material and its particular operating range.

If there was one superior model for hyperelasticity, the others would no longer be relevant.

The best recommendation is to obtain material data, fit it for all available models which your software can model, and choose the most appropriate fit. You may want to refer to thread727-53543 which describes some of this in much more detail.

Brad

 

[hbarea]

Thank you Brad for the information.

 

[Crisalvim73]

I agree with Bradh and had some experience with elastomers simulations in FEM. I think Ogden model is quite flexible to fit the experimental data becouse you can use fractional powers of stretches, not only even integer powers.
Good luck!