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user_defined_bc.cc
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Thu, Aug 15, 22:32

user_defined_bc.cc
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/**
* Copyright (©) 2010-2023 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* This file is part of Akantu
*
* 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 <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()(Idx /*node*/, VectorProxy<bool> & flags,
VectorProxy<Real> & primal,
const VectorProxy<const Real> & coord) override {
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);
Int spatial_dimension = 2;
Mesh mesh(spatial_dimension);
mesh.read("fine_mesh.msh");
SolidMechanicsModel model(mesh);
/// model initialization
model.initFull();
/// boundary conditions
Vector<Real, 2> traction{.2, .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();
return 0;
}

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