Constitutive models

RACCOON features the plug-n-play design, which allows (almost) any physically admissible combinations of available constitutive models.

The constitutive models can be roughly categorized as

  • Elasticity models

  • Viscoelasticity models

  • Plasticity (creep) models

  • Plastic hardening models

  • Phase-field fracture models

schooltip:Small deformation v.s. large deformation

We support both small deformation and large deformation. Several hyperelastic models are provided, including the Saint Vernant-Kirchhoff model, the Mooney-Rivlin model, the compressible Neo-Hookean model, and the Hencky model. Small deformation plasticity is modeled using additive decomposition of strain, while large deformation plasticity is modeled using multiplicative decomposition of the deformation gradient. Plastic hardening models and phase-field fracture models can be applied regardless of geometric nonlinearity.

Elasticity models

Viscoelasticity models

Plasticity models

Plastic hardening models

Phase-field fracture models