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kelvin.cpp
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Sun, May 12, 14:21

kelvin.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 "kelvin.hh"
#include "elasto_plastic_model.hh"
#include "kelvin_helper.hh"
/* -------------------------------------------------------------------------- */
__BEGIN_TAMAAS__
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
/* Constructors */
/* -------------------------------------------------------------------------- */
template <>
Kelvin<model_type::volume_2d, 2>::Kelvin(Model* model)
: VolumePotential(model) {
initialize(trait::components, trait::components);
}
template <>
Kelvin<model_type::volume_2d, 3>::Kelvin(Model* model)
: VolumePotential(model) {
initialize(trait::components * trait::components, trait::components);
}
template <>
Kelvin<model_type::volume_2d, 4>::Kelvin(Model* model)
: VolumePotential(model) {
initialize(trait::components * trait::components,
trait::components * trait::components);
}
/* -------------------------------------------------------------------------- */
/* Operator implementation */
/* -------------------------------------------------------------------------- */
template <model_type type, UInt order>
void Kelvin<type, order>::applyIf(GridBase<Real>& source, GridBase<Real>& out,
filter_t pred) const {
constexpr UInt derivative = order - 2;
Real nu = this->model->getPoissonRatio(), mu = this->model->getShearModulus();
influence::Kelvin<trait::dimension, derivative> kelvin(mu, nu);
auto apply = [this, &kelvin, &pred](
UInt node, decltype(this->source_buffers)& source_buffers,
decltype(this->disp_buffer)& out_buffer) {
constexpr UInt derivative = order - 2;
const Real L = this->model->getSystemSize().front();
const UInt N = this->model->getDiscretization().front();
const Real dl = L / (N - 1);
const Real xi = node * dl;
detail::LinearElement<type, decltype(kelvin)> element{
thrust::make_pair(node, xi), kelvin, source_buffers, out_buffer,
this->wavevectors};
out_buffer = 0;
// Simple condition to ensure correct integration
auto filter_out_elem = [&pred](UInt e) {
return not pred(e) and not pred(e + 1);
};
// Loop over elements
for (UInt e : Loop::range(N - 1)) {
if (filter_out_elem(e))
continue;
const thrust::pair<Real, Real> node_positions{e * dl, (e + 1) * dl};
element.integrateElement(e, node_positions);
}
// Setting fundamental frequency to zero
typename detail::KelvinTrait<
influence::Kelvin<trait::dimension, derivative>>::out_t
out_fundamental(out_buffer(0));
out_fundamental = 0;
};
this->fourierApplyIf(apply, source, out, pred);
}
/* -------------------------------------------------------------------------- */
template <model_type type, UInt order>
void Kelvin<type, order>::initialize(UInt source_components,
UInt out_components) {
// Copy horizontal sizes
std::array<UInt, trait::boundary_dimension> sizes;
std::copy(this->model->getDiscretization().begin() + 1,
this->model->getDiscretization().end(), sizes.begin());
auto hermitian_sizes =
GridHermitian<Real, trait::boundary_dimension>::hermitianDimensions(
sizes);
/// Initializing buffers
this->source_buffers.resize(this->model->getDiscretization()[0]);
std::for_each(this->source_buffers.begin(), this->source_buffers.end(),
[&](typename parent::BufferType& buffer) {
buffer.setNbComponents(source_components);
buffer.resize(hermitian_sizes);
});
this->disp_buffer.setNbComponents(out_components);
this->disp_buffer.resize(hermitian_sizes);
}
/* -------------------------------------------------------------------------- */
/* Template instanciation */
/* -------------------------------------------------------------------------- */
template class Kelvin<model_type::volume_2d, 2>;
template class Kelvin<model_type::volume_2d, 3>;
template class Kelvin<model_type::volume_2d, 4>;
/* -------------------------------------------------------------------------- */
__END_TAMAAS__

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