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rAKA/test/test_model/test_solid_mechanics_model/test_solid_mechanics_model_material_large_rotation.cc
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test_solid_mechanics_model_material_large_rotation.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 "mesh_utils.hh"
#include "non_linear_solver.hh"
#include "solid_mechanics_model.hh"
#include "sparse_matrix_aij.hh"
/* -------------------------------------------------------------------------- */
using namespace akantu;
int main(int argc, char * argv[]) {
initialize("material_elastic.dat", argc, argv);
Int dim = 3;
/// load mesh
Mesh mesh(dim);
mesh.read("cube_3d_tet_4.msh");
/// declaration of model
SolidMechanicsModel model(mesh);
/// model initialization
// model.initFull(_analysis_method=akantu._explicit_lumped_mass)
model.initFull(_analysis_method = _implicit_dynamic);
// model.initFull(_analysis_method = akantu._implicit_dynamic)
auto & solver = model.getNonLinearSolver();
solver.set("threshold", 1e-4);
solver.set("max_iterations", 100);
solver.set("convergence_type", SolveConvergenceCriteria::_residual);
model.setBaseName("waves");
model.addDumpFieldVector("displacement");
model.addDumpFieldVector("acceleration");
model.addDumpFieldVector("velocity");
model.addDumpFieldVector("internal_force");
model.addDumpFieldVector("external_force");
model.addDumpField("strain");
model.addDumpField("stress");
model.addDumpField("blocked_dofs");
/* ------------------------------------------------------------------------ */
// get mass center
/* ------------------------------------------------------------------------ */
model.assembleMass();
auto & M = model.getDOFManager().getMatrix("M");
Array<Real> _mass(M.size(), 1);
_mass.zero();
std::cout << "AAAA " << M.size() << std::endl;
std::cout << "AAAA " << _mass.size() << std::endl;
for (Int i = 0; i < M.size(); ++i) {
for (Int j = 0; j < M.size(); ++j) {
std::cout << i << ", " << j << std::endl;
_mass[i] += M(i, j);
}
}
std::array<Real, 3> mass_center{0., 0., 0.};
std::cout << "AAAA " << _mass.size() << std::endl;
Real total_mass = 0.;
for (Int i = 0; i < _mass.size(); ++i) {
for (Int j = 0; j < 3; ++j) {
mass_center[j] += _mass(i * 3 + j);
total_mass += _mass(i * 3 + j);
}
}
mass_center[0] /= total_mass / 3.;
mass_center[1] /= total_mass / 3.;
mass_center[2] /= total_mass / 3.;
std::cout << "total mass" << total_mass << std::endl;
std::cout << mass_center[0] << " " << mass_center[1] << " " << mass_center[2]
<< std::endl;
/* ---------------------------------------------------------------------- */
/* Dynamic evolution */
/* ---------------------------------------------------------------------- */
model.dump();
model.solveStep();
model.dump();
std::cout << "Converged in " << Int(solver.get("nb_iterations")) << " ("
<< Real(solver.get("error")) << ")" << std::endl;
finalize();
return EXIT_SUCCESS;
}
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