Module viscoelastic 

Viscoelastic solid constitutive models.

---

Viscoelastic solid constitutive models cannot be defined by a Helmholtz free energy density and a viscous dissipation function. These constitutive models are therefore defined by a relation for the stress as a function of the deformation gradient and rate. Consequently, the rate tangent stiffness associated with the first Piola-Kirchhoff stress is not symmetric for these models.

\mathcal{U}_{iJkL} \neq \mathcal{U}_{kLiJ}

Enums

AppliedLoad

Possible applied loads.

Traits

FirstOrderRoot

Zeroth-order root-finding methods for viscoelastic solid constitutive models.

Viscoelastic

Required methods for viscoelastic solid constitutive models.

ZerothOrderRoot

Zeroth-order root-finding methods for viscoelastic solid constitutive models.