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ntn_contact.hh
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/**
* @file ntn_contact.hh
* @author David Kammer <david.kammer@epfl.ch>
* @date Mon Feb 20 15:13:23 2012
*
* @brief contact for node to node discretization
*
* @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_CONTACT_HH__
#define __AST_NTN_CONTACT_HH__
/* -------------------------------------------------------------------------- */
// akantu
#include "solid_mechanics_model.hh"
// simtools
#include "syncronized_array.hh"
__BEGIN_SIMTOOLS__
/* -------------------------------------------------------------------------- */
using namespace akantu;
/* -------------------------------------------------------------------------- */
class NTNContact : protected Memory {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
NTNContact(SolidMechanicsModel & model,
const ContactID & id = "contact",
const MemoryID & memory_id = 0);
virtual ~NTNContact() {};
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/// add surface pair and pair nodes according to the surface normal
void addSurfacePair(Surface slave, Surface master, UInt surface_normal_dir);
/// add node pair
void addNodePair(UInt slave, UInt master);
// add node pairs from a list with pairs(*,0)=slaves and pairs(*,1)=masters
void addNodePairs(Array<UInt> & pairs);
/// update normals, lumped boundary, and impedance
void updateInternalData();
/// update (compute the normals on the master nodes)
void updateNormals();
/// update the lumped boundary B matrix
void updateLumpedBoundary();
/// update the impedance matrix
void updateImpedance();
/// compute the normal contact force
void computeContactPressure();
/// impose the normal contact force
void applyContactPressure();
/// register syncronizedarrays for sync
void registerSyncronizedArray(SyncronizedArrayBase & array);
/// dump restart file
void dumpRestart(std::string file_name) const;
/// read restart file
void readRestart(std::string file_name);
/// compute relative normal field (only value that has to be multiplied with the normal)
/// relative to master nodes
void computeRelativeNormalField(const Array<Real> & field,
Array<Real> & rel_normal_field) const;
/// compute relative tangential field (complet array)
/// relative to master nodes
void computeRelativeTangentialField(const Array<Real> & field,
Array<Real> & rel_tang_field) const;
/// function to print the contain of the class
virtual void printself(std::ostream & stream, int indent = 0) const;
protected:
/// synchronize arrays
void syncArrays(SyncChoice sync_choice);
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
AKANTU_GET_MACRO(Model, model, SolidMechanicsModel &)
AKANTU_GET_MACRO(Slaves, slaves, const SyncronizedArray<UInt> &)
AKANTU_GET_MACRO(Masters, masters, const SyncronizedArray<UInt> &)
AKANTU_GET_MACRO(Normals, normals, const SyncronizedArray<Real> &)
AKANTU_GET_MACRO(ContactPressure, contact_pressure, const SyncronizedArray<Real> &)
AKANTU_GET_MACRO(LumpedBoundary, lumped_boundary, const SyncronizedArray<Real> &)
AKANTU_GET_MACRO(Impedance, impedance, const SyncronizedArray<Real> &)
AKANTU_GET_MACRO(IsInContact, is_in_contact, const SyncronizedArray<bool> &)
/// get number of contact nodes
UInt getNbContactNodes() const { return this->slaves.getSize(); };
/// get index of node in either slaves or masters array
/// if node is in neither of them, return -1
Int getNodeIndex(UInt node) const;
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
private:
ContactID id;
SolidMechanicsModel & model;
/// array of slave nodes
SyncronizedArray<UInt> slaves;
/// array of master nodes
SyncronizedArray<UInt> masters;
/// array of normals on master nodes
SyncronizedArray<Real> normals;
/// array indicating if nodes are in contact
SyncronizedArray<Real> contact_pressure;
/// array indicating if nodes are in contact
SyncronizedArray<bool> is_in_contact;
/// boundary matrix, lumped_boundary[:,0] master nodes, lumped_boundary[:,1] slave nodes
SyncronizedArray<Real> lumped_boundary;
/// impedance matrix
SyncronizedArray<Real> impedance;
/// contact surface
std::set<Surface> contact_surfaces;
};
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
//#include "ntn_contact_inline_impl.cc"
/// standard output stream operator
inline std::ostream & operator <<(std::ostream & stream, const NTNContact & _this)
{
_this.printself(stream);
return stream;
}
__END_SIMTOOLS__
#endif /* __AST_NTN_CONTACT_HH__ */

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