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ntn_base_friction.hh
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Wed, Dec 11, 11:31

ntn_base_friction.hh
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/**
* @file ntn_base_friction.hh
* @author David Kammer <david.kammer@epfl.ch>
* @date Mon Aug 26 16:49:17 2013
*
* @brief base class for ntn and 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/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef __AST_NTN_BASE_FRICTION_HH__
#define __AST_NTN_BASE_FRICTION_HH__
/* -------------------------------------------------------------------------- */
// akantu
#include "parsable.hh"
// simtools
#include "ntn_base_contact.hh"
/* -------------------------------------------------------------------------- */
__BEGIN_AKANTU__
template<>
inline void ParsableParamTyped< akantu_simtools::SynchronizedArray<Real> >::parseParam(const ParserParameter & in_param) {
ParsableParam::parseParam(in_param);
Real tmp = in_param;
param.setAndChangeDefault(tmp);
}
/* -------------------------------------------------------------------------- */
template<>
template<>
inline void ParsableParamTyped< akantu_simtools::SynchronizedArray<Real> >::setTyped<Real>(const Real & value) {
param.setAndChangeDefault(value);
}
__END_AKANTU__
__BEGIN_SIMTOOLS__
/* -------------------------------------------------------------------------- */
using namespace akantu;
/* -------------------------------------------------------------------------- */
class NTNBaseFriction : protected Memory, public Parsable, public Dumpable {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
NTNBaseFriction(NTNBaseContact * contact,
const FrictionID & id = "friction",
const MemoryID & memory_id = 0);
virtual ~NTNBaseFriction() {};
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/// compute friction traction
virtual void computeFrictionTraction();
/// compute stick traction (friction traction needed to stick the nodes)
virtual void computeStickTraction();
/// apply the friction force
virtual void applyFrictionTraction();
/// compute slip
virtual void updateSlip();
/// register Syncronizedarrays for sync
virtual void registerSynchronizedArray(SynchronizedArrayBase & array);
/// dump restart file
virtual void dumpRestart(const std::string & file_name) const;
/// read restart file
virtual void readRestart(const std::string & file_name);
/// set to steady state
virtual void setToSteadyState() {
AKANTU_DEBUG_TO_IMPLEMENT();
};
/// get the number of sticking nodes (in parallel)
/// a node that is not in contact does not count as sticking
virtual UInt getNbStickingNodes() const;
/// function to print the contain of the class
virtual void printself(std::ostream & stream, int indent = 0) const;
protected:
/// compute frictional strength according to friction law
virtual void computeFrictionalStrength() = 0;
/* ------------------------------------------------------------------------ */
/* Dumpable */
/* ------------------------------------------------------------------------ */
public:
virtual void addDumpFieldToDumper(const std::string & dumper_name,
const std::string & field_id);
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
AKANTU_GET_MACRO(Contact, contact, const NTNBaseContact *)
AKANTU_GET_MACRO(IsSticking, is_sticking, const SynchronizedArray<bool> &)
AKANTU_GET_MACRO(FrictionalStrength, frictional_strength, const SynchronizedArray<Real> &)
AKANTU_GET_MACRO(FrictionTraction, friction_traction, const SynchronizedArray<Real> &)
AKANTU_GET_MACRO(Slip, slip, const SynchronizedArray<Real> &)
AKANTU_GET_MACRO(CumulativeSlip, cumulative_slip, const SynchronizedArray<Real> &)
AKANTU_GET_MACRO(SlipVelocity, slip_velocity, const SynchronizedArray<Real> &)
/// set parameter of a given node
/// (if you need to set to all: used the setMixed function of the Parsable).
virtual void setParam(const std::string & name, UInt node, Real value);
// replaced by the setMixed of the Parsable
// virtual void setParam(const std::string & param, Real value) {
// AKANTU_DEBUG_ERROR("Friction does not know the following parameter: " << param);
// };
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected:
NTNBaseContact * contact;
// if node is sticking
SynchronizedArray<bool> is_sticking;
// frictional strength
SynchronizedArray<Real> frictional_strength;
// friction force
SynchronizedArray<Real> friction_traction;
// slip
SynchronizedArray<Real> slip;
SynchronizedArray<Real> cumulative_slip;
// slip velocity (tangential vector)
SynchronizedArray<Real> slip_velocity;
};
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
//#include "ntn_base_friction_inline_impl.cc"
/// standard output stream operator
inline std::ostream & operator <<(std::ostream & stream, const NTNBaseFriction & _this)
{
_this.printself(stream);
return stream;
}
__END_SIMTOOLS__
#endif /* __AST_NTN_BASE_FRICTION_HH__ */

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