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rAKA/extra_packages/traction-at-split-node-contact/src/ntn_contact/friction_regularisations/ntn_fricreg_simplified_prakash_clifton.cc
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ntn_fricreg_simplified_prakash_clifton.cc
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/**
* @file ntn_fricreg_simplified_prakash_clifton.cc
*
* @author David Simon Kammer <david.kammer@epfl.ch>
*
* @date creation: Fri Mar 16 2018
* @date last modification: Fri Jul 19 2019
*
* @brief implementation of simplified prakash clifton with one parameter
*
*
* @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/>.
*
*/
/* -------------------------------------------------------------------------- */
// simtools
#include "ntn_fricreg_simplified_prakash_clifton.hh"
#include "dumper_nodal_field.hh"
#include "dumper_text.hh"
namespace akantu {
/* -------------------------------------------------------------------------- */
NTNFricRegSimplifiedPrakashClifton::NTNFricRegSimplifiedPrakashClifton(
NTNBaseContact & contact, const ID & id)
: NTNFricRegNoRegularisation(contact, id),
t_star(0, 1, 0., id + ":t_star", 0., "t_star"),
spc_internal(0, 1, 0., id + ":spc_internal", 0., "spc_internal") {
AKANTU_DEBUG_IN();
NTNFricRegNoRegularisation::registerSynchronizedArray(this->t_star);
NTNFricRegNoRegularisation::registerSynchronizedArray(this->spc_internal);
this->registerParam("t_star", this->t_star, _pat_parsmod,
"time scale of regularisation");
this->registerParam("spc_internal", this->spc_internal, _pat_internal, "");
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void NTNFricRegSimplifiedPrakashClifton::computeFrictionalStrength() {
AKANTU_DEBUG_IN();
SolidMechanicsModel & model = this->contact.getModel();
Real delta_t = model.getTimeStep();
UInt nb_contact_nodes = this->contact.getNbContactNodes();
for (UInt n = 0; n < nb_contact_nodes; ++n) {
Real alpha = delta_t / this->t_star(n);
this->frictional_strength(n) += alpha * this->spc_internal(n);
this->frictional_strength(n) /= 1 + alpha;
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void NTNFricRegSimplifiedPrakashClifton::setToSteadyState() {
AKANTU_DEBUG_IN();
/// fill the spc_internal array
computeFrictionalStrength();
/// set strength without regularisation
UInt nb_contact_nodes = this->contact.getNbContactNodes();
for (UInt n = 0; n < nb_contact_nodes; ++n) {
this->frictional_strength(n) = this->spc_internal(n);
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void NTNFricRegSimplifiedPrakashClifton::registerSynchronizedArray(
SynchronizedArrayBase & array) {
AKANTU_DEBUG_IN();
this->t_star.registerDependingArray(array);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void NTNFricRegSimplifiedPrakashClifton::dumpRestart(
const std::string & file_name) const {
AKANTU_DEBUG_IN();
this->t_star.dumpRestartFile(file_name);
this->spc_internal.dumpRestartFile(file_name);
NTNFricRegNoRegularisation::dumpRestart(file_name);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void NTNFricRegSimplifiedPrakashClifton::readRestart(
const std::string & file_name) {
AKANTU_DEBUG_IN();
this->t_star.readRestartFile(file_name);
this->spc_internal.readRestartFile(file_name);
NTNFricRegNoRegularisation::readRestart(file_name);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void NTNFricRegSimplifiedPrakashClifton::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 << "NTNFricRegSimplifiedPrakashClifton [" << std::endl;
NTNFricRegNoRegularisation::printself(stream, ++indent);
stream << space << "]" << std::endl;
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void NTNFricRegSimplifiedPrakashClifton::addDumpFieldToDumper(
const std::string & dumper_name, const std::string & field_id) {
AKANTU_DEBUG_IN();
if (field_id == "t_star") {
this->internalAddDumpFieldToDumper(
dumper_name, field_id,
std::make_unique<dumpers::NodalField<Real>>(this->t_star.getArray()));
} else {
NTNFricRegNoRegularisation::addDumpFieldToDumper(dumper_name, field_id);
}
AKANTU_DEBUG_OUT();
}
} // namespace akantu
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