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rAKA/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 Kammer <david.kammer@epfl.ch>
* @date Mon Sep 2 10:04:00 2013
*
* @brief implementation of coulomb friction
*
* @section LICENSE
*
* Copyright (©) 2010-2011 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/>.
*
*/
/* -------------------------------------------------------------------------- */
__BEGIN_SIMTOOLS__
/* -------------------------------------------------------------------------- */
template <class Regularisation>
NTNFricLawCoulomb<Regularisation>::NTNFricLawCoulomb(NTNBaseContact * contact,
const FrictionID & id,
const MemoryID & memory_id) :
Regularisation(contact,id,memory_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();
SolidMechanicsModel & model = this->contact->getModel();
UInt dim = model.getSpatialDimension();
// 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();
UInt nb_contact_nodes = this->contact->getNbContactNodes();
for (UInt 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();
#ifdef AKANTU_USE_IOHELPER
// const SynchronizedArray<UInt> * nodal_filter = &(this->contact->getSlaves());
if(field_id == "mu") {
this->internalAddDumpFieldToDumper(dumper_name,
field_id,
new DumperIOHelper::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);
}
#endif
AKANTU_DEBUG_OUT();
}
__END_SIMTOOLS__
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