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tamaas/src/bem/bem_kato.hh
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bem_kato.hh
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/**
*
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
*
* @section LICENSE
*
* Copyright (©) 2016 EPFL (Ecole Polytechnique Fédérale de
* Lausanne) Laboratory (LSMS - Laboratoire de Simulation en Mécanique des
* Solides)
*
* Tamaas 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.
*
* Tamaas 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 Tamaas. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef BEM_KATO_H
#define BEM_KATO_H
/* -------------------------------------------------------------------------- */
#include "bem_fft_base.hh"
#include "complimentary_term_functional.hh"
#include "elastic_energy_functional.hh"
/* -------------------------------------------------------------------------- */
namespace tamaas {
class BemKato : public BemFFTBase {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
BemKato(Surface<Real>& p)
: BemFFTBase(p), surface_tractions_backup(p.size(), p.getL()) {
e_star = 1.;
max_pressure = 1e300;
this->functional->addFunctionalTerm(new ComplimentaryTermFunctional(*this));
};
virtual ~BemKato(){};
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
//! compute the equilibrium situation
Real computeEquilibrium(Real epsilon, Real pressure);
public:
//! perform a line scan in a given direction
Real linescan(Real scale, Real pressure);
//! perform a line search
Real linesearch(Real& hmax, Real fold, Real pressure, int search_flag);
//! make a step in the gradient direction(copy in pressure2)
void updatePressure(Real scale);
//! backup tractions before doing the linescan
void backupTractions();
//! find the constant pressure shift making balance with load
void shiftPressure(Real required_pressure);
//! truncate the pressure to positive values
Real positivePressure(Real step);
//! compute the reaction (sum positive pressures)
void truncatePressure();
//! compute true displacements
void computeTrueDisplacements();
//! compute convergence criterion
Real computeF();
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
//! get the number of iterations
UInt getNbIterations() const { return this->nb_iterations; };
//! get the convergence steps of iterations
const std::vector<Real>& getConvergenceIterations() const {
return this->convergence_iterations;
};
//! set the maximal pressure admissible
void setMaxPressure(Real max_pressure) { this->max_pressure = max_pressure; };
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected:
//! surface of tractions used during steepest descent
Surface<Real> surface_tractions_backup;
//! maximal pressure admissible (for perfectly plastic purpose)
Real max_pressure;
};
} // namespace tamaas
#endif /* BEM_KATO_H */
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