1. Linear
  2. Nonlinear
  3. Plastic
  4. No fixed relationship
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1 Answers

Answer: Option 2

The most common example of this kind of material is rubber, whose stress-strain relationship can be defined as non-linearly elastic, isotropic, in compressible and generally independent of strain rate. Hyper elasticity provides a means of modeling the stress–strain behavior of such materials

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