Isotropic hyperelastic materials are described in terms of a
“strain energy potential,” which defines the strain energy stored in the
material per unit of reference volume (volume in the initial configuration) as
a function of the strain at that point in the material.
Several forms of strain energy potentials are available in
Abaqus
to model approximately incompressible isotropic elastomers. For more
information on hyperelastic materials, see
Hyperelastic Behavior of Rubberlike Materials.
When you define a isotropic hyperelastic material, you have the option of
either specifying material parameters directly or allowing
Abaqus
to calculate them from test data that you provide. For detailed instructions,
see the following sections: