Little-known features in FEA software convert test data into inputs for simulating hyperelastic materials.
What is in this article?:
- Start here when simulating rubber and foams
- A brief review of material models
A brief review of material models
The accuracy of simulating a hyperelastic material depends on the selected material model. Here are a few of the frequently mentioned models and where they work best.
Mooney-Rivlin works with incompressible elastomers with strain up to 200%. Rubber for an automobile tire is an example.
Arruda-Boyce is well suited for rubbers such as silicon and neoprene with strain up to 300%. This model provides good curvefitting even when test data are limited.
Ogden works for any incompressible material with strain up to 700%. This model gives better curve fitting when data from multiple tests are available.
Blatz-Ko works specifically for compressible polyurethane foam rubbers.
Hyperfoam can simulate any highly compressible material such as a cushion, sponge, or padding.