Reply To: How to compare different type of Rubber(Epdm,NR,CR,SBR) with hyperelastic material model?

[John Doyle]

With regards to your first question (i.e. how can we compare diverse material models such as natural rubber, EPDM, CR and SBR in real life?):It depends on what you are trying to compare.If you are interested in the structural response (Force-Deflection and Stress-strain) of each material in a particular application, you need to start with reliable test data.With test data, you can curve fit any of the material models (Neo-Hookean, Mooney-Rivlin, Ogden, Yeohetc) to represent the hyperelastic response.Sometimes there is more than one option that will work.Sometimes there is only one.It depends on how complicated the stress-strain relationships are and how challenging the loading is in the application.
Please refer to Section 4.6 of the Material Reference Guide for more details about these options.
With regards to your second question (i.e. how can we relate the results of the analysis to the theoretical vibrational isolation problem?) :I am not sure, but would harmonic viscoelasticity be helpful here?Please refer to Section 4.7.3 of Material Reference Guide.