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material_drucker_prager.cc
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Wed, Jun 26, 12:31

material_drucker_prager.cc
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/**
* Copyright (©) 2014-2023 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* This file is part of Akantu
*
* 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_drucker_prager.hh"
/* -------------------------------------------------------------------------- */
namespace akantu {
template <Int dim>
MaterialDruckerPrager<dim>::MaterialDruckerPrager(SolidMechanicsModel & model,
const ID & id,
const ID & fe_engine_id)
: MaterialPlastic<dim>(model, id, fe_engine_id) {
this->registerParam("phi", phi, Real(0.), _pat_parsable | _pat_modifiable,
"Internal friction angle in degrees");
this->registerParam("fc", fc, Real(1.), _pat_parsable | _pat_modifiable,
"Compressive strength");
this->registerParam("radial_return", radial_return_mapping, bool(true),
_pat_parsable | _pat_modifiable, "Radial return mapping");
}
/* -------------------------------------------------------------------------- */
template <Int dim> void MaterialDruckerPrager<dim>::updateInternalParameters() {
Parent::updateInternalParameters();
// compute alpha and k parameters for Drucker-Prager
Real phi_radian = this->phi * M_PI / 180.;
this->alpha = (6. * sin(phi_radian)) / (3. - sin(phi_radian));
Real cohesion = this->fc * (1. - sin(phi_radian)) / (2. * cos(phi_radian));
this->k = (6. * cohesion * cos(phi_radian)) / (3. - sin(phi_radian));
}
/* -------------------------------------------------------------------------- */
template <Int dim>
void MaterialDruckerPrager<dim>::computeStress(ElementType el_type,
GhostType ghost_type) {
if (this->finite_deformation) {
AKANTU_TO_IMPLEMENT();
}
MaterialThermal<dim>::computeStress(el_type, ghost_type);
// infinitesimal and finite deformation
for (auto && args : Parent::getArguments(el_type, ghost_type)) {
computeStressOnQuad(args);
}
}
/* -------------------------------------------------------------------------- */
template class MaterialDruckerPrager<1>;
template class MaterialDruckerPrager<2>;
template class MaterialDruckerPrager<3>;
const bool material_is_allocated_plastic_drucker_prager [[maybe_unused]] =
instantiateMaterial<MaterialDruckerPrager>("plastic_drucker_prager");
} // namespace akantu

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