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
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.