hyperviscoelastic#

Description#

This behavior is a general Hyper-viscoelastic form with both shear and volumetric recovery components. The model is based on the discussions from Simo and Hughs [M3]. The model uses the same hyperelastic potential components as in the hyper_elastic behavior. Also any number of shear and volumetric terms can be added to the model.

Syntax#

***behavior hyperviscoelastic [ **thermal_strain <THERMAL_STRAIN> ] [ **hyperelasticity <HYPERELASTIC_LAW> ] [ **hyperelasticity <ISOTROPIC_HYPERELASTIC_LAW> ] [ **model_coefficients ]     ...    possible **-level commands for hyper law

Example#

The following example comes from the validation tests. More examples can be found in test/Viscoelastic_test/INP

***behavior hyperviscoelastic
  **hyperelasticity logarithmic
  **elasticity isotropic
    young   2.8125
    poisson 0.40625
  **shear
      tau   1.0
      omega  0.4
  **shear
      tau   10.0
      omega  0.4
  **volumic
      tau   3.
      omega  0.5
***return