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rAKA/src/model/solid_mechanics/materials/weight_functions/stress_based_weight_function.cc
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stress_based_weight_function.cc
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/**
* @file stress_based_weight_function.cc
*
* @author Aurelia Isabel Cuba Ramos <aurelia.cubaramos@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Mon Aug 24 2015
* @date last modification: Thu Feb 20 2020
*
* @brief implementation of the stres based weight function classes
*
*
* @section LICENSE
*
* Copyright (©) 2015-2021 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 "stress_based_weight_function.hh"
namespace akantu {
/* -------------------------------------------------------------------------- */
StressBasedWeightFunction::StressBasedWeightFunction(NonLocalManager & manager)
: BaseWeightFunction(manager, "stress_based")
// stress_diag("stress_diag", material), selected_stress_diag(NULL),
// stress_base("stress_base", material), selected_stress_base(NULL),
// characteristic_size("lc", material), selected_characteristic_size(NULL)
{
// this->registerParam("ft", this->ft, 0., _pat_parsable, "Tensile strength");
// stress_diag.initialize(spatial_dimension);
// stress_base.initialize(spatial_dimension * spatial_dimension);
// characteristic_size.initialize(1);
}
/* -------------------------------------------------------------------------- */
/// During intialization the characteristic sizes for all quadrature
/// points are computed
void StressBasedWeightFunction::init() {
// const Mesh & mesh = this->material.getModel().getFEEngine().getMesh();
// for (Int g = _not_ghost; g <= _ghost; ++g) {
// GhostType gt = GhostType(g);
// Mesh::type_iterator it = mesh.firstType(spatial_dimension, gt);
// Mesh::type_iterator last_type = mesh.lastType(spatial_dimension, gt);
// for(; it != last_type; ++it) {
// UInt nb_quadrature_points =
// this->material.getModel().getFEEngine().getNbQuadraturePoints(*it, gt);
// const Array<Int> & element_filter =
// this->material.getElementFilter(*it, gt);
// UInt nb_element = element_filter.size();
// Array<Real> ones(nb_element*nb_quadrature_points, 1, 1.);
// Array<Real> & lc = characteristic_size(*it, gt);
// this->material.getModel().getFEEngine().integrateOnQuadraturePoints(ones,
// lc,
// 1,
// *it,
// gt,
// element_filter);
// for (Int q = 0; q < nb_quadrature_points * nb_element; q++) {
// lc(q) = pow(lc(q), 1./ Real(spatial_dimension));
// }
// }
// }
}
/* -------------------------------------------------------------------------- */
/// computation of principals stresses and principal directions
void StressBasedWeightFunction::updatePrincipalStress(__attribute__((unused))
GhostType ghost_type) {
// AKANTU_DEBUG_IN();
// const Mesh & mesh = this->material.getModel().getFEEngine().getMesh();
// Mesh::type_iterator it = mesh.firstType(spatial_dimension, ghost_type);
// Mesh::type_iterator last_type = mesh.lastType(spatial_dimension,
// ghost_type);
// for(; it != last_type; ++it) {
// Array<Real>::const_matrix_iterator sigma =
// this->material.getStress(*it, ghost_type).begin(spatial_dimension,
// spatial_dimension);
// auto eigenvalues =
// stress_diag(*it, ghost_type).begin(spatial_dimension);
// auto eigenvalues_end =
// stress_diag(*it, ghost_type).end(spatial_dimension);
// Array<Real>::matrix_iterator eigenvector =
// stress_base(*it, ghost_type).begin(spatial_dimension,
// spatial_dimension);
// #ifndef __trick__
// auto cl = characteristic_size(*it, ghost_type).begin();
// #endif
// UInt q = 0;
// for(;eigenvalues != eigenvalues_end; ++sigma, ++eigenvalues,
// ++eigenvector, ++cl, ++q) {
// sigma->eig(*eigenvalues, *eigenvector);
// *eigenvalues /= ft;
// #ifndef __trick__
// // specify a lower bound for principal stress based on the size of
// the element
// for (Int i = 0; i < spatial_dimension; ++i) {
// (*eigenvalues)(i) = std::max(*cl / this->R, (*eigenvalues)(i));
// }
// #endif
// }
// }
// AKANTU_DEBUG_OUT();
}
} // namespace akantu
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