A solid model governs the relationship between deformation and stress in a solid (or porous) material. GEOS provides interfaces for both small and large deformation models, as well as specific implementations of a number of well known models.
.. toctree:: :maxdepth: 1 Theory Voight Plasticity TriaxialDriver ElasticIsotropic ElasticIsotropicPressureDependent ElasticTransverseIsotropic ElasticOrthotropic DruckerPrager DruckerPragerExtended ModifiedCamClay DelftEgg Damage ViscoPlasticity