Theory GuideΒΆ Contents Continuum Mechanics General motions Lagrangian and Eulerian descriptions Displacement, velocity, acceleration fields Material, special derivatives Deformation gradient Strain and stress Strain Stress Balance laws Elasticity Lagrangian view Eulerian view Poroelasticity Constitutive Modeling Isochoric-split Material Models Linear elasticity Incompressibility Neo-Hookean Neo-Hookean Isochoric-split Mooney-Rivlin Mooney-Rivlin Isochoric-split Ogden Isochoric-split Linear poroelasticity Governing equations Elasticity Linear Hyperelasticity, initial configuration Newton linearization Hyperelasticity, current configuration Push forward, then linearize Linearize in current configuration Linearize, then push forward Pressure boundary condition Matrix-free implementation Static and Quasistatic Elastodynamics Mixed Elasticity Mixed Linear Mixed Hyperelasticity, initial configuration Newton linearization Mixed Hyperelasticity, current configuration Perturbed Lagrange-multiplier method Matrix-free implementation (mixed fields) Plasticity General Framework Free Energy Potential Yield Function Dissipation Potential Rate-independent Isotropic von Mises Model Stress Update Consistent Tangent Platen Contact Boundary Conditions Formulation Large-Deformation Frictional Contact Nitsche Method Weak Form Newton Linearization Friction Models Static Friction Models Coulomb friction Threlfall friction Newton linearization Dynamic Friction Models Phase-Field Modeling of Brittle Fracture Small strain Damage driving force and crack irreversibility Weak form Newton linearization AT1 and AT2 models Viscous regularization Hyperelasticity, initial configuration Hyperelasticity, current configuration Material Point Method Poroelasticity Linear Matrix-free implementation