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python_user_defined_bc.cc
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Wed, May 1, 02:21

python_user_defined_bc.cc
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/**
* @file python_user_defined_bc.cc
*
* @brief python-user-defined boundary condition example
*
*
* Copyright (©) 2015 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 "py_aka_array.hh"
#include "solid_mechanics_model.hh"
/* -------------------------------------------------------------------------- */
#include <cmath>
#include <iostream>
#include <pybind11/embed.h>
/* -------------------------------------------------------------------------- */
namespace py = pybind11;
/* -------------------------------------------------------------------------- */
using namespace akantu;
class PYBIND11_EXPORT SineBoundary : public BC::Dirichlet::DirichletFunctor {
public:
SineBoundary(Real amplitude, Real phase) {
py_module = py::module::import("boundary_condition");
py_sin_boundary = py_module.attr("SinBoundary")(amplitude, phase);
}
public:
inline void operator()(__attribute__((unused)) UInt node,
Vector<bool> & flags, Vector<Real> & primal,
const Vector<Real> & coord) const {
py_sin_boundary.attr("compute")(primal, coord, flags);
}
protected:
py::object py_sin_boundary;
py::module py_module;
};
/* -------------------------------------------------------------------------- */
int main(int argc, char * argv[]) {
initialize("material.dat", argc, argv);
py::scoped_interpreter guard{};
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);
SineBoundary sin_boundary(.2, 10.);
model.applyBC(sin_boundary, "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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