Mechanical Properties and Constitutive Equations
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This section of the material property input specifies the type of model, for both solids and fluids,
that relates stress and strain (or strain-rate) as well as the various parameters for these models.
Models for solids are relatively simple compared to solid mechanics codes but cover the primary
needs in fluid-solid problems. The models for fluids are quite extensive, covering Newtonian,
generalized-Newtonian, rate-dependent models, thermally-dependent models, curing and particleladen
models and combinations of these. These properties are used in the solid and fluid
momentum conservation equations.

.. include:: mechanical_and_constitutive/solid_constitutive_equation.rst

.. include:: mechanical_and_constitutive/plasticity_equation.rst

.. include:: mechanical_and_constitutive/convective_lagrangian_velocity.rst

.. include:: mechanical_and_constitutive/lame_mu.rst

.. include:: mechanical_and_constitutive/lame_lambda.rst

.. include:: mechanical_and_constitutive/stress_free_solvent_vol_frac.rst

.. include:: mechanical_and_constitutive/solid_thermal_expansion.rst

.. include:: mechanical_and_constitutive/solid_reference_temperature.rst

.. include:: mechanical_and_constitutive/plastic_viscosity.rst

.. include:: mechanical_and_constitutive/evp_yield_stress.rst

.. include:: mechanical_and_constitutive/pseudo_solid_constitutive_equation.rst

.. include:: mechanical_and_constitutive/pseudo_solid_lame_mu.rst

.. include:: mechanical_and_constitutive/pseudo_solid_lame_lambda.rst

.. include:: mechanical_and_constitutive/liquid_constitutive_equation.rst

.. include:: mechanical_and_constitutive/viscosity.rst

.. include:: mechanical_and_constitutive/low_rate_viscosity.rst

.. include:: mechanical_and_constitutive/power_law_exponent.rst

.. include:: mechanical_and_constitutive/high_rate_viscosity.rst

.. include:: mechanical_and_constitutive/time_constant.rst

.. include:: mechanical_and_constitutive/aexp.rst

.. include:: mechanical_and_constitutive/thermal_exponent.rst

.. include:: mechanical_and_constitutive/thermal_wlf_constant2.rst

.. include:: mechanical_and_constitutive/yield_stress.rst

.. include:: mechanical_and_constitutive/yield_exponent.rst

.. include:: mechanical_and_constitutive/suspension_maximum_packing.rst

.. include:: mechanical_and_constitutive/suspension_species_number.rst

.. include:: mechanical_and_constitutive/cure_gel_point.rst

.. include:: mechanical_and_constitutive/cure_a_exponent.rst

.. include:: mechanical_and_constitutive/cure_b_exponent.rst

.. include:: mechanical_and_constitutive/cure_species_number.rst

.. include:: mechanical_and_constitutive/unreacted_gel_temperature.rst

.. include:: mechanical_and_constitutive/polymer_constitutive_equation.rst

.. include:: mechanical_and_constitutive/polymer_stress_formulation.rst

.. include:: mechanical_and_constitutive/polymer_weight_function.rst

.. include:: mechanical_and_constitutive/polymer_shift_function.rst

.. include:: mechanical_and_constitutive/polymer_weighting.rst

.. include:: mechanical_and_constitutive/discontinuous_jacobian_formulation.rst

.. include:: mechanical_and_constitutive/adaptive_viscosity_scaling.rst

.. include:: mechanical_and_constitutive/polymer_viscosity.rst

.. include:: mechanical_and_constitutive/polymer_time_constant.rst

.. include:: mechanical_and_constitutive/polymer_yield_stress.rst

.. include:: mechanical_and_constitutive/mobility_parameter.rst

.. include:: mechanical_and_constitutive/ptt_xi_parameter.rst

.. include:: mechanical_and_constitutive/ptt_epsilon_parameter.rst

.. include:: mechanical_and_constitutive/surface_tension.rst

.. include:: mechanical_and_constitutive/second_level_set_conductivity.rst

.. include:: mechanical_and_constitutive/second_level_set_density.rst

.. include:: mechanical_and_constitutive/second_level_set_heat_capacity.rst

.. include:: mechanical_and_constitutive/second_level_set_momentum_source.rst

.. include:: mechanical_and_constitutive/second_level_set_viscosity.rst

.. include:: mechanical_and_constitutive/shell_bending_stiffness.rst