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rAKA/src/ntn_contact/friction_laws/ntn_friclaw_linear_slip_weakening_tmpl.hh
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ntn_friclaw_linear_slip_weakening_tmpl.hh
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/**
* @file ntn_friclaw_linear_slip_weakening_tmpl.hh
* @author David Kammer <david.kammer@epfl.ch>
* @date Mon Sep 2 15:29:27 2013
*
* @brief implementation of linear slip weakening
*
* @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/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "dumper_text.hh"
__BEGIN_SIMTOOLS__
/* -------------------------------------------------------------------------- */
template <class Regularisation>
NTNFricLawLinearSlipWeakening<Regularisation>::NTNFricLawLinearSlipWeakening(NTNBaseContact * contact,
const FrictionID & id,
const MemoryID & memory_id) :
NTNFricLawCoulomb<Regularisation>(contact,id,memory_id),
mu_s(0,1,0.,id+":mu_s",0.,"mu_s"),
mu_k(0,1,0.,id+":mu_k",0.,"mu_k"),
d_c(0,1,0.,id+":d_c",0.,"d_c") {
AKANTU_DEBUG_IN();
NTNFricLawCoulomb<Regularisation>::registerSynchronizedArray(this->mu_s);
NTNFricLawCoulomb<Regularisation>::registerSynchronizedArray(this->mu_k);
NTNFricLawCoulomb<Regularisation>::registerSynchronizedArray(this->d_c);
this->registerParam("mu_s", this->mu_s, _pat_parsmod, "static friction coefficient");
this->registerParam("mu_k", this->mu_k, _pat_parsmod, "kinetic friction coefficient");
this->registerParam("d_c", this->d_c, _pat_parsmod, "slip weakening length");
this->setParamAccessType("mu", _pat_readable);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <class Regularisation>
void NTNFricLawLinearSlipWeakening<Regularisation>::computeFrictionalStrength() {
AKANTU_DEBUG_IN();
computeFrictionCoefficient();
NTNFricLawCoulomb<Regularisation>::computeFrictionalStrength();
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <class Regularisation>
void NTNFricLawLinearSlipWeakening<Regularisation>::computeFrictionCoefficient() {
AKANTU_DEBUG_IN();
SolidMechanicsModel & model = this->contact->getModel();
UInt dim = model.getSpatialDimension();
// get arrays
const SynchronizedArray<bool> & stick = this->internalGetIsSticking();
const SynchronizedArray<Real> & slip = this->internalGetSlip();
UInt nb_contact_nodes = this->contact->getNbContactNodes();
for (UInt n=0; n<nb_contact_nodes; ++n) {
if (stick(n)) {
this->mu(n) = this->mu_s(n);
}
else {
if (slip(n) >= this->d_c(n)) {
this->mu(n) = this->mu_k(n);
}
else {
// mu = mu_k + (1 - slip / Dc) * (mu_s - mu_k)
this->mu(n) = this->mu_k(n)
+ (1 - (slip(n) / this->d_c(n))) * (this->mu_s(n) - this->mu_k(n));
}
}
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <class Regularisation>
void NTNFricLawLinearSlipWeakening<Regularisation>::registerSynchronizedArray(SynchronizedArrayBase & array) {
AKANTU_DEBUG_IN();
this->mu_s.registerDependingArray(array);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <class Regularisation>
void NTNFricLawLinearSlipWeakening<Regularisation>::dumpRestart(const std::string & file_name) const {
AKANTU_DEBUG_IN();
this->mu_s.dumpRestartFile(file_name);
this->mu_k.dumpRestartFile(file_name);
this->d_c.dumpRestartFile(file_name);
NTNFricLawCoulomb<Regularisation>::dumpRestart(file_name);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <class Regularisation>
void NTNFricLawLinearSlipWeakening<Regularisation>::readRestart(const std::string & file_name) {
AKANTU_DEBUG_IN();
this->mu_s.readRestartFile(file_name);
this->mu_k.readRestartFile(file_name);
this->d_c.readRestartFile(file_name);
NTNFricLawCoulomb<Regularisation>::readRestart(file_name);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <class Regularisation>
void NTNFricLawLinearSlipWeakening<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 << "NTNFricLawLinearSlipWeakening [" << std::endl;
NTNFricLawCoulomb<Regularisation>::printself(stream, ++indent);
stream << space << "]" << std::endl;
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <class Regularisation>
void NTNFricLawLinearSlipWeakening<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_s") {
this->internalAddDumpFieldToDumper(dumper_name,
field_id,
new DumperIOHelper::NodalField<Real>(this->mu_s.getArray()));
}
else if(field_id == "mu_k") {
this->internalAddDumpFieldToDumper(dumper_name,
field_id,
new DumperIOHelper::NodalField<Real>(this->mu_k.getArray()));
}
else if(field_id == "d_c") {
this->internalAddDumpFieldToDumper(dumper_name,
field_id,
new DumperIOHelper::NodalField<Real>(this->d_c.getArray()));
}
else {
NTNFricLawCoulomb<Regularisation>::addDumpFieldToDumper(dumper_name, field_id);
}
#endif
AKANTU_DEBUG_OUT();
}
__END_SIMTOOLS__
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