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rAKA/src/model/solid_mechanics/materials/material_plastic/material_linear_isotropic_hardening.cc
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material_linear_isotropic_hardening.cc
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/**
* @file material_linear_isotropic_hardening.cc
*
* @author Ramin Aghababaei <ramin.aghababaei@epfl.ch>
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
* @author Lucas Frerot <lucas.frerot@epfl.ch>
* @author Benjamin Paccaud <benjamin.paccaud@epfl.ch>
* @author Daniel Pino Muñoz <daniel.pinomunoz@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Mon Apr 07 2014
* @date last modification: Sat Dec 02 2017
*
* @brief Specialization of the material class for isotropic finite deformation
* linear hardening plasticity
*
* @section LICENSE
*
* Copyright (©) 2014-2018 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "material_linear_isotropic_hardening.hh"
#include "solid_mechanics_model.hh"
namespace akantu {
/* -------------------------------------------------------------------------- */
template <UInt dim>
MaterialLinearIsotropicHardening<dim>::MaterialLinearIsotropicHardening(
SolidMechanicsModel & model, const ID & id)
: MaterialPlastic<dim>(model, id) {
AKANTU_DEBUG_IN();
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <UInt spatial_dimension>
MaterialLinearIsotropicHardening<spatial_dimension>::
MaterialLinearIsotropicHardening(SolidMechanicsModel & model, UInt dim,
const Mesh & mesh, FEEngine & fe_engine,
const ID & id)
: MaterialPlastic<spatial_dimension>(model, dim, mesh, fe_engine, id) {}
/* -------------------------------------------------------------------------- */
template <UInt spatial_dimension>
void MaterialLinearIsotropicHardening<spatial_dimension>::computeStress(
ElementType el_type, GhostType ghost_type) {
AKANTU_DEBUG_IN();
MaterialThermal<spatial_dimension>::computeStress(el_type, ghost_type);
// infinitesimal and finite deformation
auto sigma_th_it = this->sigma_th(el_type, ghost_type).begin();
auto previous_sigma_th_it =
this->sigma_th.previous(el_type, ghost_type).begin();
auto previous_gradu_it = this->gradu.previous(el_type, ghost_type)
.begin(spatial_dimension, spatial_dimension);
auto previous_stress_it = this->stress.previous(el_type, ghost_type)
.begin(spatial_dimension, spatial_dimension);
auto inelastic_strain_it = this->inelastic_strain(el_type, ghost_type)
.begin(spatial_dimension, spatial_dimension);
auto previous_inelastic_strain_it =
this->inelastic_strain.previous(el_type, ghost_type)
.begin(spatial_dimension, spatial_dimension);
auto iso_hardening_it = this->iso_hardening(el_type, ghost_type).begin();
auto previous_iso_hardening_it =
this->iso_hardening.previous(el_type, ghost_type).begin();
//
// Finite Deformations
//
if (this->finite_deformation) {
auto previous_piola_kirchhoff_2_it =
this->piola_kirchhoff_2.previous(el_type, ghost_type)
.begin(spatial_dimension, spatial_dimension);
auto green_strain_it = this->green_strain(el_type, ghost_type)
.begin(spatial_dimension, spatial_dimension);
MATERIAL_STRESS_QUADRATURE_POINT_LOOP_BEGIN(el_type, ghost_type);
auto & inelastic_strain_tensor = *inelastic_strain_it;
auto & previous_inelastic_strain_tensor = *previous_inelastic_strain_it;
auto & previous_grad_u = *previous_gradu_it;
auto & previous_sigma = *previous_piola_kirchhoff_2_it;
auto & green_strain = *green_strain_it;
this->template gradUToGreenStrain<spatial_dimension>(grad_u, green_strain);
Matrix<Real> previous_green_strain(spatial_dimension, spatial_dimension);
this->template gradUToGreenStrain<spatial_dimension>(previous_grad_u,
previous_green_strain);
Matrix<Real> F_tensor(spatial_dimension, spatial_dimension);
this->template gradUToF<spatial_dimension>(grad_u, F_tensor);
computeStressOnQuad(green_strain, previous_green_strain, sigma,
previous_sigma, inelastic_strain_tensor,
previous_inelastic_strain_tensor, *iso_hardening_it,
*previous_iso_hardening_it, *sigma_th_it,
*previous_sigma_th_it, F_tensor);
++sigma_th_it;
++inelastic_strain_it;
++iso_hardening_it;
++previous_sigma_th_it;
//++previous_stress_it;
++previous_gradu_it;
++green_strain_it;
++previous_inelastic_strain_it;
++previous_iso_hardening_it;
++previous_piola_kirchhoff_2_it;
MATERIAL_STRESS_QUADRATURE_POINT_LOOP_END;
}
// Infinitesimal deformations
else {
MATERIAL_STRESS_QUADRATURE_POINT_LOOP_BEGIN(el_type, ghost_type);
auto & inelastic_strain_tensor = *inelastic_strain_it;
auto & previous_inelastic_strain_tensor = *previous_inelastic_strain_it;
auto & previous_grad_u = *previous_gradu_it;
auto & previous_sigma = *previous_stress_it;
computeStressOnQuad(
grad_u, previous_grad_u, sigma, previous_sigma, inelastic_strain_tensor,
previous_inelastic_strain_tensor, *iso_hardening_it,
*previous_iso_hardening_it, *sigma_th_it, *previous_sigma_th_it);
++sigma_th_it;
++inelastic_strain_it;
++iso_hardening_it;
++previous_sigma_th_it;
++previous_stress_it;
++previous_gradu_it;
++previous_inelastic_strain_it;
++previous_iso_hardening_it;
MATERIAL_STRESS_QUADRATURE_POINT_LOOP_END;
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <UInt spatial_dimension>
void MaterialLinearIsotropicHardening<spatial_dimension>::computeTangentModuli(
const ElementType & el_type, Array<Real> & tangent_matrix,
GhostType ghost_type) {
AKANTU_DEBUG_IN();
auto previous_gradu_it = this->gradu.previous(el_type, ghost_type)
.begin(spatial_dimension, spatial_dimension);
auto previous_stress_it = this->stress.previous(el_type, ghost_type)
.begin(spatial_dimension, spatial_dimension);
auto iso_hardening = this->iso_hardening(el_type, ghost_type).begin();
MATERIAL_TANGENT_QUADRATURE_POINT_LOOP_BEGIN(tangent_matrix);
computeTangentModuliOnQuad(tangent, grad_u, *previous_gradu_it, sigma,
*previous_stress_it, *iso_hardening);
++previous_gradu_it;
++previous_stress_it;
++iso_hardening;
MATERIAL_TANGENT_QUADRATURE_POINT_LOOP_END;
this->was_stiffness_assembled = true;
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
INSTANTIATE_MATERIAL(plastic_linear_isotropic_hardening,
MaterialLinearIsotropicHardening);
} // akantu
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