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tamaas/src/bem/elastic_energy_functional.cpp
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elastic_energy_functional.cpp
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/**
*
* @author Lucas Frérot <lucas.frerot@epfl.ch>
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
*
* @section LICENSE
*
* Copyright (©) 2016 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 "elastic_energy_functional.hh"
#include "bem_fft_base.hh"
#include "surface_statistics.hh"
/* -------------------------------------------------------------------------- */
namespace tamaas {
/* -------------------------------------------------------------------------- */
ElasticEnergyFunctional::ElasticEnergyFunctional(BemFFTBase& bem)
: Functional(bem) {}
/* -------------------------------------------------------------------------- */
ElasticEnergyFunctional::~ElasticEnergyFunctional() {}
/* -------------------------------------------------------------------------- */
Real ElasticEnergyFunctional::computeF() {
const Surface<Real>& displacements = bem.getDisplacements();
const Surface<Real>& tractions = bem.getTractions();
const UInt n = displacements.size();
const UInt size = n * n;
Real res = 0;
#pragma omp parallel for reduction(+ : res)
for (UInt i = 0; i < size; ++i) {
res += displacements(i) * tractions(i);
}
return 0.5 * res;
}
/* -------------------------------------------------------------------------- */
void ElasticEnergyFunctional::computeGradFP() {
*this->gradF += bem.getDisplacements();
}
/* -------------------------------------------------------------------------- */
void ElasticEnergyFunctional::computeGradFU() {
*this->gradF += bem.getTractions();
}
} // namespace tamaas
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