ntrf_friction_linear_slip_weakening.cc
f37f2c5bc4b3master

ntrf_friction_linear_slip_weakening.cc
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			/**
			* @file ntrf_friction_linear_slip_weakening.cc
			* @author David Kammer <david.kammer@epfl.ch>
			* @date Mon May 13 17:12:09 2013
			*
			* @brief implementation of linear slip weakening ntrf 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/>.
			*
			*/

			/* -------------------------------------------------------------------------- */
			// simtools
			#include "ntrf_friction_linear_slip_weakening.hh"

			__BEGIN_SIMTOOLS__

			/* -------------------------------------------------------------------------- */
			NTRFFrictionLinearSlipWeakening::NTRFFrictionLinearSlipWeakening(NTRFContact & contact,
			const FrictionID & id,
			const MemoryID & memory_id) :
			NTRFFrictionRegularizedCoulomb(contact,id,memory_id),
			weakening_length(0,1,0.,id+":weakening_lingth",0.,"weakening_length"),
			mu_s(0,1,0.,id+":mu_s",0.,"mu_s"),
			mu_k(0,1,0.,id+":mu_k",0.,"mu_k") {
			AKANTU_DEBUG_IN();

			NTRFFrictionRegularizedCoulomb::registerSynchronizedArray(this->weakening_length);
			NTRFFrictionRegularizedCoulomb::registerSynchronizedArray(this->mu_s);
			NTRFFrictionRegularizedCoulomb::registerSynchronizedArray(this->mu_k);

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			void NTRFFrictionLinearSlipWeakening::computeFrictionCoefficient() {
			AKANTU_DEBUG_IN();

			SolidMechanicsModel & model = this->contact.getModel();
			UInt dim = model.getSpatialDimension();
			UInt nb_ntn_pairs = this->contact.getNbContactNodes();

			for (UInt n=0; n<nb_ntn_pairs; ++n) {
			if (this->is_sticking(n)) {
			this->mu(n) = this->mu_s(n);
			}
			else {
			if (this->slip(n) >= this->weakening_length(n)) {
			this->mu(n) = this->mu_k(n);
			}
			else {
			// mu = mu_k + (1 - delta / Dc) * (mu_s - mu_k)
			Real delta = this->slip(n) - this->weakening_length(n);
			delta /= this->weakening_length(n);
			this->mu(n) = this->mu_k(n) + (1 - delta) * (this->mu_s(n) - this->mu_k(n));
			}
			}
			}

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			void NTRFFrictionLinearSlipWeakening::computeFrictionalStrength() {
			AKANTU_DEBUG_IN();

			computeFrictionCoefficient();
			NTRFFrictionRegularizedCoulomb::computeFrictionalStrength();

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			void NTRFFrictionLinearSlipWeakening::registerSynchronizedArray(SynchronizedArrayBase & array) {
			AKANTU_DEBUG_IN();

			this->weakening_length.registerDependingArray(array);

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			void NTRFFrictionLinearSlipWeakening::dumpRestart(const std::string & file_name) const {
			AKANTU_DEBUG_IN();

			this->weakening_length.dumpRestartFile(file_name);
			this->mu_s.dumpRestartFile(file_name);
			this->mu_k.dumpRestartFile(file_name);

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			void NTRFFrictionLinearSlipWeakening::readRestart(const std::string & file_name) {
			AKANTU_DEBUG_IN();

			this->weakening_length.readRestartFile(file_name);
			this->mu_s.readRestartFile(file_name);
			this->mu_k.readRestartFile(file_name);

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			void NTRFFrictionLinearSlipWeakening::setMuS(Real mu) {
			AKANTU_DEBUG_IN();

			NTRFFriction::setInternalArray(this->mu_s, mu);

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			void NTRFFrictionLinearSlipWeakening::setMuS(UInt node, Real mu) {
			AKANTU_DEBUG_IN();

			NTRFFriction::setInternalArray(this->mu_s, node, mu);

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			void NTRFFrictionLinearSlipWeakening::setMuK(Real mu) {
			AKANTU_DEBUG_IN();

			NTRFFriction::setInternalArray(this->mu_k, mu);

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			void NTRFFrictionLinearSlipWeakening::setMuK(UInt node, Real mu) {
			AKANTU_DEBUG_IN();

			NTRFFriction::setInternalArray(this->mu_k, node, mu);

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			void NTRFFrictionLinearSlipWeakening::setWeakeningLength(Real length) {
			AKANTU_DEBUG_IN();

			NTRFFriction::setInternalArray(this->weakening_length, length);

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			void NTRFFrictionLinearSlipWeakening::setWeakeningLength(UInt node, Real length) {
			AKANTU_DEBUG_IN();

			NTRFFriction::setInternalArray(this->weakening_length, node, length);

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			void NTRFFrictionLinearSlipWeakening::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 << "NTRFFrictionLinearSlipWeakening [" << std::endl;
			NTRFFrictionRegularizedCoulomb::printself(stream, indent+1);

			stream << space << this->weakening_length << std::endl;
			stream << space << this->mu_s << std::endl;
			stream << space << this->mu_k << std::endl;

			stream << space << "]" << std::endl;


			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			void NTRFFrictionLinearSlipWeakening::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_static") {
			this->internalAddDumpFieldToDumper(dumper_name,
			field_id,
			new DumperIOHelper::NodalField<Real>(this->mu_s.getArray()));
			}
			else if(field_id == "mu_kinetic") {
			this->internalAddDumpFieldToDumper(dumper_name,
			field_id,
			new DumperIOHelper::NodalField<Real>(this->mu_k.getArray()));
			}
			else if(field_id == "weakening_length") {
			this->internalAddDumpFieldToDumper(dumper_name,
			field_id,
			new DumperIOHelper::NodalField<Real>(this->weakening_length.getArray()));
			}
			else {
			NTRFFrictionRegularizedCoulomb::addDumpFieldToDumper(dumper_name, field_id);
			}

			#endif

			AKANTU_DEBUG_OUT();
			}

			__END_SIMTOOLS__

rAKA/ntrf_contact/friction_laws/ntrf_friction_linear_slip_weakening.ccf37f2c5bc4b3master

ntrf_friction_linear_slip_weakening.ccView Options

rAKA/ntrf_contact/friction_laws/ntrf_friction_linear_slip_weakening.cc
f37f2c5bc4b3master

ntrf_friction_linear_slip_weakening.cc
View Options