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material_igfem_elastic.cc
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Wed, May 15, 21:58

material_igfem_elastic.cc
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/**
* @file material_igfem_elastic.cc
*
* @author Aurelia Isabel Cuba Ramos <aurelia.cubaramos@epfl.ch>
*
*
* @brief Specializaton of material class for the igfem elastic material
*
*
* Copyright (©) 2010-2012, 2014 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
*/
/* -------------------------------------------------------------------------- */
#include "material_igfem_elastic.hh"
#include "material_elastic.hh"
namespace akantu {
/* -------------------------------------------------------------------------- */
template <Int dim>
MaterialIGFEMElastic<dim>::MaterialIGFEMElastic(SolidMechanicsModel & model,
const ID & id)
: Material(model, id), Parent(model, id), lambda("lambda", *this),
mu("mu", *this), kpa("kappa", *this) {
AKANTU_DEBUG_IN();
this->initialize();
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <Int dim> void MaterialIGFEMElastic<dim>::initialize() {
this->lambda.initialize(1);
this->mu.initialize(1);
this->kpa.initialize(1);
}
/* -------------------------------------------------------------------------- */
template <Int dim> void MaterialIGFEMElastic<dim>::initMaterial() {
AKANTU_DEBUG_IN();
Parent::initMaterial();
/// insert the sub_material names into the map
this->sub_material_names[0] = this->name_sub_mat_1;
this->sub_material_names[1] = this->name_sub_mat_2;
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <Int spatial_dimension>
void MaterialIGFEMElastic<spatial_dimension>::updateElasticInternals(
const Array<Element> & element_list) {
/// compute the Lamé constants for both sub-materials
Vector<Real> lambda_per_sub_mat(this->nb_sub_materials);
Vector<Real> mu_per_sub_mat(this->nb_sub_materials);
Vector<Real> kpa_per_sub_mat(this->nb_sub_materials);
for (UInt i = 0; i < this->nb_sub_materials; ++i) {
ID mat_name = this->sub_material_names[i];
const MaterialElastic<spatial_dimension> & mat =
dynamic_cast<MaterialElastic<spatial_dimension> &>(
this->model->getMaterial(mat_name));
lambda_per_sub_mat(i) = mat.getLambda();
mu_per_sub_mat(i) = mat.getMu();
kpa_per_sub_mat(i) = mat.getKappa();
}
for (ghost_type_t::iterator g = ghost_type_t::begin();
g != ghost_type_t::end(); ++g) {
GhostType ghost_type = *g;
/// loop over all types in the material
typedef ElementTypeMapArray<Idx>::type_iterator iterator;
iterator it = this->element_filter.firstType(spatial_dimension, ghost_type,
_ek_igfem);
iterator last_type =
this->element_filter.lastType(spatial_dimension, ghost_type, _ek_igfem);
/// loop over all types in the filter
for (; it != last_type; ++it) {
ElementType el_type = *it;
if (el_type == _igfem_triangle_4)
this->template setSubMaterial<_igfem_triangle_4>(element_list,
ghost_type);
else if (el_type == _igfem_triangle_5)
this->template setSubMaterial<_igfem_triangle_5>(element_list,
ghost_type);
else
AKANTU_ERROR("There is currently no other IGFEM type implemented");
UInt nb_element = this->element_filter(el_type, ghost_type).getSize();
UInt nb_quads = this->fem->getNbIntegrationPoints(el_type);
/// get pointer to internals for given type
Real * lambda_ptr = this->lambda(el_type, ghost_type).data();
Real * mu_ptr = this->mu(el_type, ghost_type).data();
Real * kpa_ptr = this->kpa(el_type, ghost_type).data();
UInt * sub_mat_ptr = this->sub_material(el_type, ghost_type).data();
for (UInt q = 0; q < nb_element * nb_quads;
++q, ++lambda_ptr, ++mu_ptr, ++kpa_ptr, ++sub_mat_ptr) {
UInt index = *sub_mat_ptr;
*lambda_ptr = lambda_per_sub_mat(index);
*mu_ptr = mu_per_sub_mat(index);
*kpa_ptr = kpa_per_sub_mat(index);
}
}
}
}
/* -------------------------------------------------------------------------- */
template <Int spatial_dimension>
void MaterialIGFEMElastic<spatial_dimension>::computeStress(
ElementType el_type, GhostType ghost_type) {
AKANTU_DEBUG_IN();
Parent::computeStress(el_type, ghost_type);
if (!this->finite_deformation) {
/// get pointer to internals
Real * lambda_ptr = this->lambda(el_type, ghost_type).data();
Real * mu_ptr = this->mu(el_type, ghost_type).data();
MATERIAL_STRESS_QUADRATURE_POINT_LOOP_BEGIN(el_type, ghost_type);
this->computeStressOnQuad(grad_u, sigma, *lambda_ptr, *mu_ptr);
++lambda_ptr;
++mu_ptr;
MATERIAL_STRESS_QUADRATURE_POINT_LOOP_END;
} else {
AKANTU_DEBUG_TO_IMPLEMENT();
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <Int spatial_dimension>
void MaterialIGFEMElastic<spatial_dimension>::computeTangentModuli(
__attribute__((unused)) ElementType el_type, Array<Real> & tangent_matrix,
__attribute__((unused)) GhostType ghost_type) {
AKANTU_DEBUG_IN();
/// get pointer to internals
Real * lambda_ptr = this->lambda(el_type, ghost_type).data();
Real * mu_ptr = this->mu(el_type, ghost_type).data();
MATERIAL_TANGENT_QUADRATURE_POINT_LOOP_BEGIN(tangent_matrix);
this->computeTangentModuliOnQuad(tangent, *lambda_ptr, *mu_ptr);
++lambda_ptr;
++mu_ptr;
MATERIAL_TANGENT_QUADRATURE_POINT_LOOP_END;
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <Int spatial_dimension>
void MaterialIGFEMElastic<spatial_dimension>::computePotentialEnergy(
ElementType el_type, GhostType ghost_type) {
AKANTU_DEBUG_IN();
// MaterialThermal<spatial_dimension>::computePotentialEnergy(el_type,
// ghost_type);
// if(ghost_type != _not_ghost) return;
// Array<Real>::scalar_iterator epot = this->potential_energy(el_type,
// ghost_type).begin();
// if (!this->finite_deformation) {
// MATERIAL_STRESS_QUADRATURE_POINT_LOOP_BEGIN(el_type, ghost_type);
// this->computePotentialEnergyOnQuad(grad_u, sigma, *epot);
// ++epot;
// MATERIAL_STRESS_QUADRATURE_POINT_LOOP_END;
// } else {
// Matrix<Real> E(spatial_dimension, spatial_dimension);
// MATERIAL_STRESS_QUADRATURE_POINT_LOOP_BEGIN(el_type, ghost_type);
// this->template gradUToGreenStrain<spatial_dimension>(grad_u, E);
// this->computePotentialEnergyOnQuad(E, sigma, *epot);
// ++epot;
// MATERIAL_STRESS_QUADRATURE_POINT_LOOP_END;
// }
AKANTU_DEBUG_TO_IMPLEMENT();
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <Int spatial_dimension>
void MaterialIGFEMElastic<spatial_dimension>::computePotentialEnergyByElement(
ElementType type, UInt index, Vector<Real> & epot_on_quad_points) {
// Array<Real>::matrix_iterator gradu_it =
// this->gradu(type).begin(spatial_dimension,
// spatial_dimension);
// Array<Real>::matrix_iterator gradu_end =
// this->gradu(type).begin(spatial_dimension,
// spatial_dimension);
// Array<Real>::matrix_iterator stress_it =
// this->stress(type).begin(spatial_dimension,
// spatial_dimension);
// if (this->finite_deformation)
// stress_it = this->piola_kirchhoff_2(type).begin(spatial_dimension,
// spatial_dimension);
// UInt nb_quadrature_points =
// this->model->getFEEngine().getNbQuadraturePoints(type);
// gradu_it += index*nb_quadrature_points;
// gradu_end += (index+1)*nb_quadrature_points;
// stress_it += index*nb_quadrature_points;
// Real * epot_quad = epot_on_quad_points.data();
// Matrix<Real> grad_u(spatial_dimension, spatial_dimension);
// for(;gradu_it != gradu_end; ++gradu_it, ++stress_it, ++epot_quad) {
// if (this->finite_deformation)
// this->template gradUToGreenStrain<spatial_dimension>(*gradu_it,
// grad_u);
// else
// grad_u.copy(*gradu_it);
// this->computePotentialEnergyOnQuad(grad_u, *stress_it, *epot_quad);
// }
AKANTU_DEBUG_TO_IMPLEMENT();
}
/* -------------------------------------------------------------------------- */
template <Int spatial_dimension>
void MaterialIGFEMElastic<spatial_dimension>::onElementsAdded(
const Array<Element> & element_list, const NewElementsEvent & event) {
Parent::onElementsAdded(element_list, event);
updateElasticInternals(element_list);
};
INSTANTIATE_MATERIAL(MaterialIGFEMElastic);
} // namespace akantu

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