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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 Lucas Frerot <lucas.frerot@epfl.ch>
* @author Daniel Pino Muñoz <daniel.pinomunoz@epfl.ch>
* @author Ramin Aghababaei <ramin.aghababaei@epfl.ch>
* @author Benjamin Paccaud <benjamin.paccaud@epfl.ch>
*
* @date creation: Thu Oct 03 2013
* @date last modification: Fri Jun 13 2014
*
* @brief Specialization of the material class for isotropic finite deformation linear hardening plasticity
*
* @section LICENSE
*
* Copyright (©) 2014 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"
__BEGIN_AKANTU__
/* -------------------------------------------------------------------------- */
template<UInt dim>
MaterialLinearIsotropicHardening<dim>::MaterialLinearIsotropicHardening(SolidMechanicsModel & model,
const ID & id) :
Material(model, 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) :
Material(model, dim, mesh, fe_engine, 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
Array<Real>::iterator<> sigma_th_it =
this->sigma_th(el_type, ghost_type).begin();
Array<Real>::iterator<> previous_sigma_th_it =
this->sigma_th.previous(el_type, ghost_type).begin();
Array<Real>::matrix_iterator previous_gradu_it =
this->gradu.previous(el_type, ghost_type).begin(spatial_dimension, spatial_dimension);
Array<Real>::matrix_iterator previous_stress_it =
this->stress.previous(el_type, ghost_type).begin(spatial_dimension, spatial_dimension);
Array<Real>::matrix_iterator inelastic_strain_it =
this->inelastic_strain(el_type, ghost_type).begin(spatial_dimension,spatial_dimension);
Array<Real>::matrix_iterator previous_inelastic_strain_it =
this->inelastic_strain.previous(el_type, ghost_type).begin(spatial_dimension,spatial_dimension);
Array<Real>::iterator<> iso_hardening_it =
this->iso_hardening(el_type, ghost_type).begin();
Array<Real>::iterator<> previous_iso_hardening_it =
this->iso_hardening.previous(el_type, ghost_type).begin();
//
// Finite Deformations
//
if (this->finite_deformation) {
Array<Real>::matrix_iterator previous_piola_kirchhoff_2_it =
this->piola_kirchhoff_2.previous(el_type, ghost_type).begin(spatial_dimension, spatial_dimension);
Array<Real>::matrix_iterator 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);
Matrix<Real> & inelastic_strain_tensor = *inelastic_strain_it;
Matrix<Real> & previous_inelastic_strain_tensor = *previous_inelastic_strain_it;
Matrix<Real> & previous_grad_u = *previous_gradu_it;
Matrix<Real> & previous_sigma = *previous_piola_kirchhoff_2_it;
Matrix<Real> & 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);
Matrix<Real> & inelastic_strain_tensor = *inelastic_strain_it;
Matrix<Real> & previous_inelastic_strain_tensor = *previous_inelastic_strain_it;
Matrix<Real> & previous_grad_u = *previous_gradu_it;
Matrix<Real> & 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(__attribute__((unused)) const ElementType & el_type,
Array<Real> & tangent_matrix,
__attribute__((unused)) GhostType ghost_type) {
AKANTU_DEBUG_IN();
Array<Real>::const_matrix_iterator previous_gradu_it =
this->gradu.previous(el_type, ghost_type).begin(spatial_dimension, spatial_dimension);
Array<Real>::const_matrix_iterator previous_stress_it =
this->stress.previous(el_type, ghost_type).begin(spatial_dimension, spatial_dimension);
Array<Real>::const_scalar_iterator 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_tensor, *previous_stress_it, *iso_hardening);
++previous_gradu_it;
++previous_stress_it;
++iso_hardening;
MATERIAL_TANGENT_QUADRATURE_POINT_LOOP_END;
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
INSTANSIATE_MATERIAL(MaterialLinearIsotropicHardening);
__END_AKANTU__

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