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material_cohesive.hh
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/**
* @file material_cohesive.hh
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
* @author Seyedeh Mohadeseh Taheri Mousavi <mohadeseh.taherimousavi@epfl.ch>
* @author Marco Vocialta <marco.vocialta@epfl.ch>
*
* @date creation: Fri Jun 18 2010
* @date last modification: Wed Feb 21 2018
*
* @brief Specialization of the material class for cohesive elements
*
*
* 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 "material.hh"
/* -------------------------------------------------------------------------- */
#include "cohesive_internal_field.hh"
/* -------------------------------------------------------------------------- */
#ifndef AKANTU_MATERIAL_COHESIVE_HH_
#define AKANTU_MATERIAL_COHESIVE_HH_
/* -------------------------------------------------------------------------- */
namespace akantu {
class SolidMechanicsModelCohesive;
}
namespace akantu {
class MaterialCohesive : public Material {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
using MyFEEngineCohesiveType =
FEEngineTemplate<IntegratorGauss, ShapeLagrange, _ek_cohesive>;
public:
MaterialCohesive(SolidMechanicsModel & model, const ID & id = "");
~MaterialCohesive() override;
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/// initialize the material computed parameter
void initMaterial() override;
/// compute tractions (including normals and openings)
void computeTraction(GhostType ghost_type = _not_ghost);
/// assemble residual
void assembleInternalForces(GhostType ghost_type = _not_ghost) override;
/// check stress for cohesive elements' insertion, by default it
/// also updates the cohesive elements' data
virtual void checkInsertion(bool /*check_only*/ = false) {
AKANTU_TO_IMPLEMENT();
}
/// interpolate stress on given positions for each element (empty
/// implemantation to avoid the generic call to be done on cohesive elements)
virtual void interpolateStress(const ElementType /*type*/,
Array<Real> & /*result*/) {}
/// compute the stresses
void computeAllStresses(GhostType /*ghost_type*/ = _not_ghost) override{};
// add the facet to be handled by the material
UInt addFacet(const Element & element);
protected:
virtual void computeTangentTraction(ElementType /*el_type*/,
Array<Real> & /*tangent_matrix*/,
const Array<Real> & /*normal*/,
GhostType /*ghost_type*/ = _not_ghost) {
AKANTU_TO_IMPLEMENT();
}
/// compute the normal
void computeNormal(const Array<Real> & position, Array<Real> & normal,
ElementType type, GhostType ghost_type);
/// compute the opening
void computeOpening(const Array<Real> & displacement, Array<Real> & opening,
ElementType type, GhostType ghost_type);
template <ElementType type>
void computeNormal(const Array<Real> & position, Array<Real> & normal,
GhostType ghost_type);
/// assemble stiffness
void assembleStiffnessMatrix(GhostType ghost_type) override;
/// constitutive law
virtual void computeTraction(const Array<Real> & normal, ElementType el_type,
GhostType ghost_type = _not_ghost) = 0;
/// parallelism functions
inline UInt getNbData(const Array<Element> & elements,
const SynchronizationTag & tag) const override;
inline void packData(CommunicationBuffer & buffer,
const Array<Element> & elements,
const SynchronizationTag & tag) const override;
inline void unpackData(CommunicationBuffer & buffer,
const Array<Element> & elements,
const SynchronizationTag & tag) override;
protected:
void updateEnergies(ElementType el_type) override;
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
/// get the opening
AKANTU_GET_MACRO_BY_ELEMENT_TYPE_CONST(Opening, opening, Real);
/// get the traction
AKANTU_GET_MACRO_BY_ELEMENT_TYPE_CONST(Traction, tractions, Real);
/// get damage
AKANTU_GET_MACRO_BY_ELEMENT_TYPE_CONST(Damage, damage, Real);
/// get facet filter
AKANTU_GET_MACRO_BY_ELEMENT_TYPE_CONST(FacetFilter, facet_filter, UInt);
AKANTU_GET_MACRO_BY_ELEMENT_TYPE(FacetFilter, facet_filter, UInt);
AKANTU_GET_MACRO(FacetFilter, facet_filter,
const ElementTypeMapArray<UInt> &);
// AKANTU_GET_MACRO(ElementFilter, element_filter, const
// ElementTypeMapArray<UInt> &);
/// compute reversible energy
Real getReversibleEnergy();
/// compute dissipated energy
Real getDissipatedEnergy();
/// compute contact energy
Real getContactEnergy();
/// get energy
Real getEnergy(const std::string & type) override;
/// return the energy (identified by id) for the provided element
Real getEnergy(const std::string & energy_id, ElementType type,
UInt index) override {
return Material::getEnergy(energy_id, type, index);
}
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected:
/// list of facets assigned to this material
ElementTypeMapArray<UInt> facet_filter;
/// Link to the cohesive fem object in the model
FEEngine & fem_cohesive;
private:
/// reversible energy by quadrature point
CohesiveInternalField<Real> reversible_energy;
/// total energy by quadrature point
CohesiveInternalField<Real> total_energy;
protected:
/// opening in all elements and quadrature points
CohesiveInternalField<Real> opening;
/// traction in all elements and quadrature points
CohesiveInternalField<Real> tractions;
/// traction due to contact
CohesiveInternalField<Real> contact_tractions;
/// normal openings for contact tractions
CohesiveInternalField<Real> contact_opening;
/// maximum displacement
CohesiveInternalField<Real> delta_max;
/// tell if the previous delta_max state is needed (in iterative schemes)
bool use_previous_delta_max;
/// tell if the previous opening state is needed (in iterative schemes)
bool use_previous_opening;
/// damage
CohesiveInternalField<Real> damage;
/// pointer to the solid mechanics model for cohesive elements
SolidMechanicsModelCohesive * model;
/// critical stress
RandomInternalField<Real, FacetInternalField> sigma_c;
/// critical displacement
Real delta_c;
/// array to temporarily store the normals
Array<Real> normal;
};
} // namespace akantu
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
#include "material_cohesive_inline_impl.hh"
#include "cohesive_internal_field_tmpl.hh"
#endif /* AKANTU_MATERIAL_COHESIVE_HH_ */

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