Theory Manual Version 3.4
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Subsection 5.3.2: Ogden Hyperelastic Up Section 5.3: Nearly-Incompressible Materials Subsection 5.3.4: Arruda-Boyce Hyperelasticity

### 5.3.3 Veronda-Westmann Hyperelasticity

This model is similar to the Mooney-Rivlin model in that it also uses an uncoupled strain energy. However, in this case the strain energy is given by an exponential form: The dilatational term is identical to the Mooney-Rivlin model.
The Cauchy stress is found from where The strain energy derivatives are given by This material model was the result from the research of the elastic response of skin tissue [78].
Subsection 5.3.2: Ogden Hyperelastic Up Section 5.3: Nearly-Incompressible Materials Subsection 5.3.4: Arruda-Boyce Hyperelasticity