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user_defined_bc.cc
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/**
* @file user_defined_bc.cc
*
* @author Aurelia Isabel Cuba Ramos <aurelia.cubaramos@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Wed Aug 04 2010
* @date last modification: Wed Feb 06 2019
*
* @brief example of boundary conditions
*
*
* @section LICENSE
*
* Copyright (©) 2010-2021 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 "solid_mechanics_model.hh"
/* -------------------------------------------------------------------------- */
#include <cmath>
#include <iostream>
/* -------------------------------------------------------------------------- */
using namespace akantu;
class SineBoundary : public BC::Dirichlet::DirichletFunctor {
public:
SineBoundary(Real amp, Real phase, BC::Axis ax = _x)
: DirichletFunctor(ax), amplitude(amp), phase(phase) {}
public:
inline void operator()(__attribute__((unused)) UInt node,
Vector<bool> & flags, Vector<Real> & primal,
const Vector<Real> & coord) const {
DIRICHLET_SANITY_CHECK;
flags(axis) = true;
primal(axis) = -amplitude * std::sin(phase * coord(1));
}
protected:
Real amplitude;
Real phase;
};
/* -------------------------------------------------------------------------- */
int main(int argc, char * argv[]) {
initialize("material.dat", argc, argv);
UInt spatial_dimension = 2;
Mesh mesh(spatial_dimension);
mesh.read("fine_mesh.msh");
SolidMechanicsModel model(mesh);
/// model initialization
model.initFull();
/// boundary conditions
Vector<Real> traction(2, 0.2);
model.applyBC(SineBoundary(.2, 10., _x), "Fixed_x");
model.applyBC(BC::Dirichlet::FixedValue(0., _y), "Fixed_y");
model.applyBC(BC::Neumann::FromTraction(traction), "Traction");
// output a paraview file with the boundary conditions
model.setBaseName("plate");
model.addDumpFieldVector("displacement");
model.addDumpFieldVector("external_force");
model.addDumpField("blocked_dofs");
model.dump();
finalize();
return EXIT_SUCCESS;
}
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