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material_von_mises_mazars.cc
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/**
* @file material_von_mises_mazars.cc
*
* @author Mohit Pundir <mohit.pundir@epfl.ch>
*
* @date creation: Mon Apr 07 2014
* @date last modification: Fri Dec 04 2020
*
* @brief Mazars damage with Von Misses criteria
*
*
* @section LICENSE
*
* Copyright (©) 2014-2021 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_von_mises_mazars.hh"
#include "solid_mechanics_model.hh"
namespace akantu {
/* -------------------------------------------------------------------------- */
template <UInt dim, template <UInt> class Parent>
MaterialVonMisesMazars<dim, Parent>::MaterialVonMisesMazars(
SolidMechanicsModel & model, const ID & id)
: MaterialDamage<dim, Parent>(model, id), K0("K0", *this),
damage_in_compute_stress(true) {
AKANTU_DEBUG_IN();
this->registerParam("K0", K0, _pat_parsable, "K0");
this->registerParam("At", At, Real(0.8), _pat_parsable, "At");
this->registerParam("Ac", Ac, Real(1.4), _pat_parsable, "Ac");
this->registerParam("Bc", Bc, Real(1900.), _pat_parsable, "Bc");
this->registerParam("Bt", Bt, Real(12000.), _pat_parsable, "Bt");
this->registerParam("beta", beta, Real(1.06), _pat_parsable, "beta");
this->K0.initialize(1);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <UInt spatial_dimension, template <UInt> class Parent>
void MaterialVonMisesMazars<spatial_dimension, Parent>::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();
Real * dam = this->damage(el_type, ghost_type).storage();
//
// 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 gradUToE<spatial_dimension>(grad_u, green_strain);
Matrix<Real> previous_green_strain(spatial_dimension, spatial_dimension);
this->template gradUToE<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);
MaterialLinearIsotropicHardening<spatial_dimension>::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);
Real Ehat = 0;
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;
MaterialLinearIsotropicHardening<spatial_dimension>::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);
Matrix<Real> grad_u_elastic(grad_u);
grad_u_elastic -= inelastic_strain_tensor;
computeStressOnQuad(grad_u_elastic, sigma, *dam, Ehat);
++dam;
++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();
}
/* -------------------------------------------------------------------------- */
INSTANTIATE_MATERIAL(plastic_mazars, MaterialVonMisesMazars);
} // namespace akantu

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