MPM# gs.materials.MPM.Elastic Elastic Elastic.E Elastic.model Elastic.model_post_init() Elastic.model_config gs.materials.MPM.ElastoPlastic ElastoPlastic ElastoPlastic.yield_lower ElastoPlastic.yield_higher ElastoPlastic.use_von_mises ElastoPlastic.von_mises_yield_stress ElastoPlastic.model_post_init() ElastoPlastic.model_config gs.materials.MPM.Liquid Liquid Liquid.viscous Liquid.model_post_init() Liquid.model_config gs.materials.MPM.Muscle Muscle Muscle.E Muscle.model Muscle.n_groups Muscle.stiffness Muscle.model_post_init() Muscle.model_config gs.materials.MPM.Sand Sand Sand.sampler Sand.friction_angle Sand.alpha Sand.model_post_init() Sand.model_config gs.materials.MPM.Snow Snow Snow.sampler Snow.use_von_mises Snow.model_post_init() Snow.model_config