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shape_cohesive.hh
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/**
* @file shape_cohesive.hh
*
* @author Marco Vocialta <marco.vocialta@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date Fri Feb 03 16:28:03 2012
*
* @brief shape functions for cohesive elements description
*
* @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/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "aka_vector.hh"
#include "shape_functions.hh"
#include "shape_lagrange.hh"
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_SHAPE_COHESIVE_HH__
#define __AKANTU_SHAPE_COHESIVE_HH__
__BEGIN_AKANTU__
struct CohesiveReduceFunctionMean {
inline Real operator()(Real u_plus, Real u_minus) {
return .5*(u_plus + u_minus);
}
};
struct CohesiveReduceFunctionOpening {
inline Real operator()(Real u_plus, Real u_minus) {
return (u_plus - u_minus);
}
};
template <class ShapeFunction>
class ShapeCohesive : public ShapeFunctions {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
ShapeCohesive(const Mesh & mesh,
const ID & id = "shape_cohesive",
const MemoryID & memory_id = 0);
virtual ~ShapeCohesive() { if(sub_type_shape_function) delete sub_type_shape_function; };
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/// pre compute all shapes on the element control points from natural coordinates
template <ElementType type>
void precomputeShapesOnControlPoints(GhostType ghost_type);
/// pre compute all shapes on the element control points from natural coordinates
template <ElementType type>
void precomputeShapeDerivativesOnControlPoints(GhostType ghost_type);
/// interpolate nodal values on the control points
template <ElementType type, class ReduceFunction>
void interpolateOnControlPoints(const Vector<Real> &u,
Vector<Real> &uq,
UInt nb_degree_of_freedom,
const GhostType ghost_type = _not_ghost,
const Vector<UInt> * filter_elements = NULL) const;
template <ElementType type>
void interpolateOnControlPoints(const Vector<Real> &u,
Vector<Real> &uq,
UInt nb_degree_of_freedom,
const GhostType ghost_type = _not_ghost,
const Vector<UInt> * filter_elements = NULL) const {
interpolateOnControlPoints<type, CohesiveReduceFunctionMean>(u, uq, nb_degree_of_freedom, ghost_type, filter_elements);
}
/// compute the gradient of u on the control points
template <ElementType type, class ReduceFunction>
void variationOnControlPoints(const Vector<Real> &u,
Vector<Real> &nablauq,
UInt nb_degree_of_freedom,
GhostType ghost_type = _not_ghost,
const Vector<UInt> * filter_elements = NULL) const;
template <ElementType type, class ReduceFunction>
void computeNormalsOnControlPoints(const Vector<Real> &u,
Vector<Real> &normals_u,
GhostType ghost_type = _not_ghost,
const Vector<UInt> * filter_elements = NULL) const;
/// multiply a field by shape functions
template <ElementType type>
void fieldTimesShapes(__attribute__((unused)) const Vector<Real> & field,
__attribute__((unused)) Vector<Real> & fiedl_times_shapes,
__attribute__((unused)) GhostType ghost_type) const {
AKANTU_DEBUG_TO_IMPLEMENT();
}
/// function to print the contain of the class
// virtual void printself(std::ostream & stream, int indent = 0) const {};
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
const Vector<Real> & getShapes(const ElementType & type,
GhostType ghost_type = _not_ghost) const;
const Vector<Real> & getShapesDerivatives(const ElementType & type,
GhostType ghost_type = _not_ghost) const;
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
private:
/// real shape function implementation
//\todo QUESTION!!!!!!! why having a member of the class you derive ? what do you gain ? containing the storage of the shapes
ShapeFunction * sub_type_shape_function;
};
typedef ShapeCohesive<ShapeLagrange> ShapeCohesiveLagrange;
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
#include "shape_cohesive_inline_impl.cc"
/// standard output stream operator
template <class ShapeFunction>
inline std::ostream & operator <<(std::ostream & stream, const ShapeCohesive<ShapeFunction> & _this)
{
_this.printself(stream);
return stream;
}
__END_AKANTU__
#endif /* __AKANTU_SHAPE_COHESIVE_HH__ */

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