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cohesive_extrinsic.cc
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cohesive_extrinsic.cc
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/**
* @file cohesive_extrinsic.cc
*
* @author Zineb Fouad <zineb.fouad@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
* @author Seyedeh Mohadeseh Taheri Mousavi <mohadeseh.taherimousavi@epfl.ch>
* @author Marco Vocialta <marco.vocialta@epfl.ch>
*
* @date creation: Tue May 08 2012
* @date last modification: Wed Feb 06 2019
*
* @brief Cohesive element examples in extrinsic
*
*
* @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_cohesive.hh>
/* -------------------------------------------------------------------------- */
#include <chrono>
#include <fstream>
#include <iostream>
/* -------------------------------------------------------------------------- */
using clk = std::chrono::high_resolution_clock;
using std::chrono::duration_cast;
using std::chrono::microseconds;
//#define AKANTU_VERSION_MAJOR 2
class Chrono {
public:
inline void start() { _start = clk::now(); };
inline void store_time(const std::string &type) {
clk::time_point _end = clk::now();
if (measures.find(type) == measures.end()) {
measures[type] = duration_cast<microseconds>(_end - _start);
nb_measures[type] = 1;
} else {
measures[type] += duration_cast<microseconds>(_end - _start);
++nb_measures[type];
}
_start = clk::now();
}
virtual void printself(std::ostream &stream, int indent = 0) const {
std::string space(indent, AKANTU_INDENT);
stream << space << "Chrono [" << std::endl;
std::map<std::string, microseconds>::const_iterator it;
for (it = measures.begin(); it != measures.end(); ++it) {
const std::pair<std::string, microseconds> &p = *it;
const unsigned int &nb_measure = nb_measures.find(p.first)->second;
stream << space << " + " << p.first << "\t: " << std::setw(7)
<< std::fixed << std::setprecision(0)
<< p.second.count() / double(nb_measure) << "us" << std::endl;
}
stream << space << "]" << std::endl;
}
private:
clk::time_point _start;
std::map<std::string, microseconds> measures;
std::map<std::string, unsigned int> nb_measures;
};
inline std::ostream &operator<<(std::ostream &stream, const Chrono &_this) {
_this.printself(stream);
return stream;
}
using namespace akantu;
int main(int argc, char *argv[]) {
initialize("material.dat", argc, argv);
const UInt spatial_dimension = 3;
Chrono chrono;
chrono.start();
clk::time_point start_time = clk::now();
Mesh mesh(spatial_dimension);
auto whoami = Communicator::getStaticCommunicator().whoAmI();
if (whoami == 0) {
mesh.read("cube.msh");
}
mesh.distribute();
chrono.store_time("initialize_mesh");
SolidMechanicsModelCohesive model(mesh);
/// model initialization
model.initFull(_analysis_method = _static, _is_extrinsic = true);
chrono.store_time("init_full");
auto &blocked_dofs = model.getBlockedDOFs();
auto &force = model.getExternalForce();
/// boundary conditions
model.applyBC(BC::Dirichlet::FixedValue(0.0, _z), "bottom"); // face
model.applyBC(BC::Dirichlet::FixedValue(0.0, _x), "right line"); // line
blocked_dofs(3, _y) = true; // point
const auto &usersect = getUserParser();
const Real c = usersect.getParameter("compression");
const Real s = usersect.getParameter("shear");
const Real inc_s = usersect.getParameter("inc_shear");
const bool output_energy = usersect.getParameter("output_energy", true);
const bool output_paraview = usersect.getParameter("output_energy", true);
const UInt max_steps = usersect.getParameter("max_steps");
Matrix<Real> compression{{c, 0., 0.}, {0., c, 0.}, {0., 0., c}};
Matrix<Real> shear{{0., 0., s}, {0., 0., 0.}, {s, 0., 0.}};
force.zero();
model.applyBC(BC::Neumann::FromHigherDim(compression), "top");
model.applyBC(BC::Neumann::FromHigherDim(compression), "bottom");
model.applyBC(BC::Neumann::FromHigherDim(shear), "top");
model.applyBC(BC::Neumann::FromHigherDim(shear), "bottom");
model.applyBC(BC::Neumann::FromHigherDim(shear), "side left");
model.applyBC(BC::Neumann::FromHigherDim(shear), "side right");
if (output_paraview) {
model.setBaseName("extrinsic");
model.addDumpFieldVector("displacement");
model.addDumpField("internal_force");
model.addDumpField("external_force");
model.addDumpField("stress");
model.addDumpField("blocked_dofs");
model.addDumpField("grad_u");
model.addDumpFieldToDumper("cohesive elements", "displacement");
model.addDumpFieldToDumper("cohesive elements", "tractions");
model.dump();
model.dump("cohesive elements");
}
chrono.store_time("initial_condition");
model.solveStep("static");
chrono.store_time("static_solve");
std::ofstream fout;
fout.open("energies.csv", std::ofstream::out | std::ofstream::trunc);
fout << "step, ed, ep, ek, ew, et" << std::endl;
Real Ed{0}, Ep{0}, Ek{0}, Ew{0};
if (output_energy) {
Ep = model.getEnergy("potential");
// Ek = model.getEnergy("kinetic");
Ew += model.getEnergy("external work");
}
auto Et = Ed + Ep + Ek - Ew;
if (output_energy and whoami == 0) {
fout << 0 << ", " << Ed << ", " << Ep << ", " << Ek << ", " << Ew << ", "
<< Et << std::endl;
}
model.initNewSolver(_explicit_lumped_mass);
Real time_step = model.getStableTimeStep() * 0.05;
model.setTimeStep(time_step);
if (whoami == 0) {
std::cout << "Time step: " << time_step << std::endl;
}
if (output_paraview) {
model.addDumpField("velocity");
model.addDumpField("acceleration");
model.addDumpFieldToDumper("cohesive elements", "velocity");
model.dump();
model.dump("cohesive elements");
}
Matrix<Real> new_shear{{0., 0., inc_s}, {0., 0., 0.}, {inc_s, 0., 0.}};
auto init_time = duration_cast<microseconds>(clk::now() - start_time);
chrono.store_time("before_step");
start_time = clk::now();
/// Main loop
for (auto s : arange(1, max_steps)) {
if (s % 100 == 0 and s < 10000) {
model.applyBC(BC::Neumann::FromHigherDim(new_shear), "top");
model.applyBC(BC::Neumann::FromHigherDim(new_shear), "bottom");
model.applyBC(BC::Neumann::FromHigherDim(new_shear), "side left");
model.applyBC(BC::Neumann::FromHigherDim(new_shear), "side right");
}
model.checkCohesiveStress();
chrono.store_time("check_cohesive_stress");
model.solveStep("explicit_lumped");
chrono.store_time("solve_step");
if (output_energy) {
Ed = model.getEnergy("dissipated");
Ep = model.getEnergy("potential");
Ek = model.getEnergy("kinetic");
Ew += model.getEnergy("external work");
Et = Ed + Ep + Ek - Ew;
if (whoami == 0) {
fout << s << ", " << Ed << ", " << Ep << ", " << Ek << ", " << Ew
<< ", " << Et << std::endl;
}
chrono.store_time("energies");
}
if (output_paraview and (s % 100 == 0)) {
model.dump();
model.dump("cohesive elements");
if (whoami == 0) {
std::cout << "passing step " << s << "/" << max_steps << std::endl;
}
chrono.store_time("dumpers");
}
}
auto loop_time = duration_cast<microseconds>(clk::now() - start_time);
if (whoami == 0) {
std::cout << "The dissipated energy is " << Ed << std::endl;
}
if (whoami == 0) {
std::cout << chrono << std::endl;
std::cout << "Nb proc: "
<< Communicator::getStaticCommunicator().getNbProc() << std::endl;
std::cout << "Full time: " << (init_time + loop_time).count() << std::endl;
std::cout << "Init time: " << init_time.count() << std::endl;
std::cout << "Step time: " << loop_time.count()
<< " - nb_steps: " << (max_steps - 1)
<< " - time_per_step: " << (loop_time.count() / (max_steps - 1))
<< std::endl;
}
fout.close();
finalize();
return EXIT_SUCCESS;
}

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