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rAKA/extra_packages/traction-at-split-node-contact/src/ntn_contact/friction_laws/ntn_friclaw_coulomb_tmpl.hh
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ntn_friclaw_coulomb_tmpl.hh
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/**
* @file ntn_friclaw_coulomb_tmpl.hh
*
* @author David Simon Kammer <david.kammer@epfl.ch>
*
* @date creation: Fri Mar 16 2018
* @date last modification: Fri Jul 19 2019
*
* @brief implementation of coulomb friction
*
*
* @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 "dumper_nodal_field.hh"
namespace akantu {
/* -------------------------------------------------------------------------- */
template <class Regularisation>
NTNFricLawCoulomb<Regularisation>::NTNFricLawCoulomb(NTNBaseContact & contact,
const ID & id)
: Regularisation(contact, id), mu(0, 1, 0., id + ":mu", 0., "mu") {
AKANTU_DEBUG_IN();
Regularisation::registerSynchronizedArray(this->mu);
this->registerParam("mu", this->mu, _pat_parsmod, "friction coefficient");
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <class Regularisation>
void NTNFricLawCoulomb<Regularisation>::computeFrictionalStrength() {
AKANTU_DEBUG_IN();
// get contact arrays
const SynchronizedArray<bool> & is_in_contact =
this->internalGetIsInContact();
const SynchronizedArray<Real> & pressure = this->internalGetContactPressure();
// array to fill
SynchronizedArray<Real> & strength = this->internalGetFrictionalStrength();
auto nb_contact_nodes = this->contact.getNbContactNodes();
for (Int n = 0; n < nb_contact_nodes; ++n) {
// node pair is NOT in contact
if (!is_in_contact(n)) {
strength(n) = 0.;
// node pair is in contact
} else {
// compute frictional strength
strength(n) = this->mu(n) * pressure(n);
}
}
Regularisation::computeFrictionalStrength();
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <class Regularisation>
void NTNFricLawCoulomb<Regularisation>::registerSynchronizedArray(
SynchronizedArrayBase & array) {
AKANTU_DEBUG_IN();
this->mu.registerDependingArray(array);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <class Regularisation>
void NTNFricLawCoulomb<Regularisation>::dumpRestart(
const std::string & file_name) const {
AKANTU_DEBUG_IN();
this->mu.dumpRestartFile(file_name);
Regularisation::dumpRestart(file_name);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <class Regularisation>
void NTNFricLawCoulomb<Regularisation>::readRestart(
const std::string & file_name) {
AKANTU_DEBUG_IN();
this->mu.readRestartFile(file_name);
Regularisation::readRestart(file_name);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <class Regularisation>
void NTNFricLawCoulomb<Regularisation>::printself(std::ostream & stream,
int indent) const {
AKANTU_DEBUG_IN();
std::string space;
for (Int i = 0; i < indent; i++, space += AKANTU_INDENT) {
;
}
stream << space << "NTNFricLawCoulomb [" << std::endl;
Regularisation::printself(stream, ++indent);
stream << space << "]" << std::endl;
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <class Regularisation>
void NTNFricLawCoulomb<Regularisation>::addDumpFieldToDumper(
const std::string & dumper_name, const std::string & field_id) {
AKANTU_DEBUG_IN();
if (field_id == "mu") {
this->internalAddDumpFieldToDumper(
dumper_name, field_id,
std::make_unique<dumpers::NodalField<Real>>(this->mu.getArray()));
}
/*
else if (field_id == "frictional_contact_pressure") {
this->internalAddDumpFieldToDumper(dumper_name,
field_id,
new
DumperIOHelper::NodalField<Real>(this->frictional_contact_pressure.getArray()));
}
*/
else {
Regularisation::addDumpFieldToDumper(dumper_name, field_id);
}
AKANTU_DEBUG_OUT();
}
} // namespace akantu
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