SmallDeformation/ConstitutiveRelations/SolidMechanics.cpp

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// SPDX-FileCopyrightText: Copyright (c) OpenGeoSys Community (opengeosys.org)
// SPDX-License-Identifier: BSD-3-Clause
 
#include "SolidMechanics.h"
 
namespace ProcessLib::SmallDeformation
{
namespace ConstitutiveRelations
{
template <int DisplacementDim>
void SolidMechanicsModel<DisplacementDim>::eval(
    SpaceTimeData const& x_t,
    Temperature const& temperature,
    StrainData<DisplacementDim> const& eps_data,
    PrevState<StrainData<DisplacementDim>> const& eps_data_prev,
    MaterialStateData<DisplacementDim>& mat_state,
    PrevState<StressData<DisplacementDim>> const& stress_data_prev,
    StressData<DisplacementDim>& stress_data,
    SolidMechanicsDataStateless<DisplacementDim>& current_stateless,
    FreeEnergyDensityData& free_energy_density_data) const
{
    namespace MPL = MaterialPropertyLib;
 
    // current state
    MPL::VariableArray variables;
    {
        // thermodynamic forces
        variables.stress = stress_data.sigma;
        variables.mechanical_strain = eps_data.eps;
 
        // external state variables
        variables.temperature = *temperature;
    }
 
    // previous state
    MPL::VariableArray variables_prev;
    {
        // thermodynamic forces
        variables_prev.stress = stress_data_prev->sigma;
        variables_prev.mechanical_strain = eps_data_prev->eps;
 
        // external state variables
        variables_prev.temperature = *temperature;
    }
 
    auto solution = solid_material_.integrateStress(
        variables_prev, variables, x_t.t, x_t.x, x_t.dt,
        *mat_state.material_state_variables);
 
    if (!solution)
    {
        OGS_FATAL("Computation of local constitutive relation failed.");
    }
 
    std::tie(stress_data.sigma, mat_state.material_state_variables,
             current_stateless.stiffness_tensor) = std::move(*solution);
 
    free_energy_density_data.free_energy_density =
        solid_material_.computeFreeEnergyDensity(
            x_t.t, x_t.x, x_t.dt, eps_data.eps, stress_data.sigma,
            *mat_state.material_state_variables);
}
 
template struct SolidMechanicsModel<2>;
template struct SolidMechanicsModel<3>;
}  // namespace ConstitutiveRelations
}  // namespace ProcessLib::SmallDeformation