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ntn_contact.hh
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/**
* @file ntn_contact.hh
*
* @author David Simon Kammer <david.kammer@epfl.ch>
*
* @date creation: Fri Mar 16 2018
* @date last modification: Tue Sep 29 2020
*
* @brief contact for node to node discretization
*
*
* @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/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef AST_NTN_CONTACT_HH_
#define AST_NTN_CONTACT_HH_
/* -------------------------------------------------------------------------- */
// simtools
#include "ntn_base_contact.hh"
namespace akantu {
/* -------------------------------------------------------------------------- */
class NTNContact : public NTNBaseContact {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
NTNContact(SolidMechanicsModel & model, const ID & id = "contact");
~NTNContact() override = default;
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/// add surface pair and pair nodes according to the surface normal
void addSurfacePair(const ID & slave, const ID & master,
UInt surface_normal_dir);
/// fills the pairs vector with interface node pairs (*,0)=slaves,
/// (*,1)=masters
static void pairInterfaceNodes(const ElementGroup & slave_boundary,
const ElementGroup & master_boundary,
UInt surface_normal_dir, const Mesh & mesh,
Array<UInt> & pairs);
// add node pairs from a list with pairs(*,0)=slaves and pairs(*,1)=masters
void addNodePairs(const Array<UInt> & pairs);
/// add node pair
void addSplitNode(UInt slave, UInt master) override;
/// update (compute the normals on the master nodes)
void updateNormals() override;
/// update the lumped boundary B matrix
void updateLumpedBoundary() override;
/// update the impedance matrix
void updateImpedance() override;
/// impose the normal contact force
void applyContactPressure() override;
/// dump restart file
void dumpRestart(const std::string & file_name) const override;
/// read restart file
void readRestart(const std::string & file_name) override;
/// compute the normal gap
void computeNormalGap(Array<Real> & gap) const override {
this->computeRelativeNormalField(this->model.getCurrentPosition(), gap);
};
/// 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 override;
/// compute relative tangential field (complet array)
/// relative to master nodes
void
computeRelativeTangentialField(const Array<Real> & field,
Array<Real> & rel_tang_field) const override;
/// function to print the contain of the class
void printself(std::ostream & stream, int indent = 0) const override;
protected:
/// synchronize arrays
void syncArrays(SyncChoice sync_choice) override;
/* ------------------------------------------------------------------------ */
/* Dumpable */
/* ------------------------------------------------------------------------ */
public:
void addDumpFieldToDumper(const std::string & dumper_name,
const std::string & field_id) override;
// virtual void addDumpFieldVector(const std::string & field_id);
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
AKANTU_GET_MACRO(Masters, masters, const SynchronizedArray<UInt> &)
AKANTU_GET_MACRO(LumpedBoundaryMasters, lumped_boundary_masters,
const SynchronizedArray<Real> &)
/// get interface node pairs (*,0) are slaves, (*,1) are masters
void getNodePairs(Array<UInt> & pairs) const;
/// get index of node in either slaves or masters array
/// if node is in neither of them, return -1
Int getNodeIndex(UInt node) const override;
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
private:
/// array of master nodes
SynchronizedArray<UInt> masters;
/// lumped boundary of master nodes
SynchronizedArray<Real> lumped_boundary_masters;
// element list for dump and lumped_boundary
ElementTypeMapArray<UInt> master_elements;
};
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
//#include "ntn_contact_inline_impl.hh"
/// standard output stream operator
inline std::ostream & operator<<(std::ostream & stream,
const NTNContact & _this) {
_this.printself(stream);
return stream;
}
} // namespace akantu
#endif /* AST_NTN_CONTACT_HH_ */

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