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mindlin.cpp
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Sun, May 12, 11:27

mindlin.cpp
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/**
* @file
*
* @author Lucas Frérot <lucas.frerot@epfl.ch>
*
* @section LICENSE
*
* Copyright (©) 2017 EPFL (Ecole Polytechnique Fédérale de
* Lausanne) Laboratory (LSMS - Laboratoire de Simulation en Mécanique des
* Solides)
*
* Tamaas 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.
*
* Tamaas 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 Tamaas. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "mindlin.hh"
#include "boussinesq_helper.hh"
#include "elasto_plastic_model.hh"
#include "influence.hh"
#include "kelvin_helper.hh"
/* -------------------------------------------------------------------------- */
namespace tamaas {
/* -------------------------------------------------------------------------- */
template <model_type type, UInt derivative>
Mindlin<type, derivative>::Mindlin(Model* model) : parent(model) {
surface_tractions.setNbComponents(trait::components);
surface_tractions.resize(this->source_buffer.front().sizes());
}
/* -------------------------------------------------------------------------- */
template <model_type type, UInt derivative>
void Mindlin<type, derivative>::applyIf(GridBase<Real>& source,
GridBase<Real>& out,
filter_t pred) const {
Real nu = this->model->getPoissonRatio(), mu = this->model->getShearModulus();
influence::Kelvin<trait::dimension, derivative> kelvin(mu, nu);
influence::Kelvin<trait::dimension, 2> kelvin_strain(mu, nu);
influence::Boussinesq<trait::dimension, derivative - 1> boussinesq(mu, nu);
influence::ElasticHelper<trait::dimension> elasticity(mu, nu);
detail::KelvinHelper<type, decltype(kelvin)> khelper;
detail::SurfaceTractionHelper<type> thelper;
detail::BoussinesqHelper<type, decltype(boussinesq)> bhelper;
const Real L = this->model->getSystemSize().front();
auto apply = [&](decltype(this->source_buffer)& source_buffers,
decltype(this->disp_buffer)& out_buffers) {
surface_tractions = 0;
// computing surface tractions (q power cancelled with
// boussinesq)
thelper.template computeSurfaceTractions<true>(
source_buffers, surface_tractions, this->wavevectors, L, kelvin_strain,
elasticity);
surface_tractions *= -1;
// apply kelvin
khelper.applyIntegral(source_buffers, out_buffers, this->wavevectors, L,
kelvin);
khelper.applyFreeTerm(source_buffers, out_buffers, kelvin);
// no need for fundamental correction
// apply boussinesq (q power cancelled with mindlin 2-grad)
bhelper.template apply<true>(surface_tractions, out_buffers,
this->wavevectors, L, boussinesq);
// Correcting for fundamental mode
Vector<Real, trait::dimension> n{{{0, 0, -1}}};
for (UInt i : Loop::range(source_buffers.size())) {
typename detail::KelvinTrait<decltype(kelvin)>::source_t w(
source_buffers[i](0));
typename detail::KelvinTrait<decltype(kelvin)>::out_t u(
out_buffers[i](0));
auto t = dense(w) * n;
bhelper.makeFundamentalModeGreatAgain(t, u, elasticity);
}
};
this->fourierApplyIf(apply, source, out, pred);
}
/* -------------------------------------------------------------------------- */
/* Template instanciation */
/* -------------------------------------------------------------------------- */
template class Mindlin<model_type::volume_2d, 1>;
template class Mindlin<model_type::volume_2d, 2>;
} // namespace tamaas

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