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example_parser.cc
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/**
* @file example_parser.cc
*
* @author Fabian Barras <fabian.barras@epfl.ch>
*
* @date creation: Mon Dec 14 2015
* @date last modification: Wed Feb 06 2019
*
* @brief Example of using the user parameter parser
*
*
* @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 "non_linear_solver.hh"
#include "solid_mechanics_model.hh"
/* -------------------------------------------------------------------------- */
#include <iostream>
/* -------------------------------------------------------------------------- */
using namespace akantu;
int main(int argc, char * argv[]) {
// Precise in initialize the name of the text input file to parse.
initialize("input_file.dat", argc, argv);
// Get the user ParserSection.
const ParserSection & usersect = getUserParser();
// getParameterValue() allows to extract data associated to a given parameter
// name
// and cast it in the desired type set as template paramter.
Mesh mesh(usersect.getParameterValue<UInt>("spatial_dimension"));
mesh.read(usersect.getParameterValue<std::string>("mesh_file"));
// getParameter() can be used with variable declaration (destination type is
// explicitly known).
Int max_iter = usersect.getParameter("max_nb_iterations");
Real precision = usersect.getParameter("precision");
// Following NumPy convention, data can be interpreted as Vector or Matrix
// structures.
Matrix<Real> eigen_stress = usersect.getParameter("stress");
SolidMechanicsModel model(mesh);
model.initFull(SolidMechanicsModelOptions(_static));
model.applyBC(BC::Dirichlet::FixedValue(0.0, _x),
usersect.getParameterValue<std::string>("outter_crust"));
model.applyBC(BC::Dirichlet::FixedValue(0.0, _y),
usersect.getParameterValue<std::string>("outter_crust"));
model.applyBC(BC::Neumann::FromStress(eigen_stress),
usersect.getParameterValue<std::string>("inner_holes"));
model.setDirectory("./paraview");
model.setBaseName("swiss_cheese");
model.addDumpFieldVector("displacement");
auto & solver = model.getNonLinearSolver();
solver.set("max_iterations", max_iter);
solver.set("threshold", precision);
model.solveStep();
model.dump();
finalize();
return EXIT_SUCCESS;
}

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