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resolution_penalty.hh
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/**
* @file contact_resolution_penalty.hh
*
* @author Mohit Pundir <mohit.pundir@epfl.ch>
*
* @date creation: Fri Jun 18 2010
* @date last modification: Mon Jan 29 2018
*
* @brief Material isotropic thermo-elastic
*
* @section LICENSE
*
* Copyright (©) 2010-2018 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/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "aka_common.hh"
#include "resolution.hh"
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_RESOLUTION_PENALTY_HH__
#define __AKANTU_RESOLUTION_PENALTY_HH__
namespace akantu {
class ResolutionPenalty : public Resolution {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
ResolutionPenalty(ContactMechanicsModel & model, const ID & id = "");
~ResolutionPenalty() override = default;
protected:
/// initialize the resolution
void initialize();
/// local computation of stifnness matrix due to normal stress
void computeNormalStiffness(Matrix<Real> & kc,
Vector<Real> & n,
Array<Real> & n_alpha,
Array<Real> & d_alpha,
Matrix<Real> & surface_matrix,
Real & gap);
/// local computation of stiffness matrix due to frictional stress
void computeFrictionalStiffness(Vector<Real> & n,
Array<Real> & n_alpha,
Array<Real> & d_alpha,
Real & gap);
/// local computation of direct stiffness matrix due to friction,
/// this matrix is common for both stick and slip part
void computeCommonModuli(Real & gap);
/// local computaion of stiffness matrix due to stick state
void computeStickModuli();
/// local computation of stiffness matrix due to slip state
void computeSlipModuli();
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/// local computation of tangent moduli
void computeTangentModuli(Matrix<Real> &,
Vector<Real> & /* N */,
Array<Real> & /* N_alpha */,
Array<Real> & /* D_alpha */,
Matrix<Real> & /* A matrix */,
Real & /* gap */
) override;
/// local computation of normal force
void computeNormalForce(Vector<Real> & /* force vector */,
Vector<Real> & /* n */,
Real & /* gap */) override;
/// local computation of friction force
void computeFrictionForce(Vector<Real> & /* force vector */,
Array<Real> & /* D_alpha */,
Real & /* gap */) override;
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected:
/// penalty parameter for normal stress
Real epsilon;
/// penalty parameter for tangential stress
Real epsilon_t;
};
} // akantu
#endif /* __AKANTU_RESOLUTION_PENALTY_HH__ */

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