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solid_mechanics_model_cohesive.hh
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solid_mechanics_model_cohesive.hh
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/**
* @file solid_mechanics_model_cohesive.hh
*
* @author Marco Vocialta <marco.vocialta@epfl.ch>
*
* @date Tue May 08 13:01:18 2012
*
* @brief Solid mechanics model for cohesive elements
*
* @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/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_SOLID_MECHANICS_MODEL_COHESIVE_HH__
#define __AKANTU_SOLID_MECHANICS_MODEL_COHESIVE_HH__
#include "solid_mechanics_model.hh"
#include "solid_mechanics_model_event_handler.hh"
#include "cohesive_element_inserter.hh"
#if defined(AKANTU_PARALLEL_COHESIVE_ELEMENT)
# include "facet_synchronizer.hh"
# include "facet_stress_synchronizer.hh"
#endif
/* -------------------------------------------------------------------------- */
__BEGIN_AKANTU__
/* -------------------------------------------------------------------------- */
struct SolidMechanicsModelCohesiveOptions : public SolidMechanicsModelOptions {
SolidMechanicsModelCohesiveOptions(AnalysisMethod analysis_method = _explicit_lumped_mass,
bool extrinsic = false,
bool no_init_materials = false,
bool init_facet_filter = true,
bool stress_interpolation = true) :
SolidMechanicsModelOptions(analysis_method, no_init_materials),
extrinsic(extrinsic), init_facet_filter(init_facet_filter),
stress_interpolation(stress_interpolation) {}
bool extrinsic;
bool init_facet_filter;
bool stress_interpolation;
};
extern const SolidMechanicsModelCohesiveOptions default_solid_mechanics_model_cohesive_options;
/* -------------------------------------------------------------------------- */
/* Solid Mechanics Model for Cohesive elements */
/* -------------------------------------------------------------------------- */
class SolidMechanicsModelCohesive : public SolidMechanicsModel,
public SolidMechanicsModelEventHandler{
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
class NewCohesiveNodesEvent : public NewNodesEvent {
public:
AKANTU_GET_MACRO_NOT_CONST(OldNodesList, old_nodes, Array<UInt> &);
AKANTU_GET_MACRO(OldNodesList, old_nodes, const Array<UInt> &);
protected:
Array<UInt> old_nodes;
};
typedef FEMTemplate<IntegratorGauss, ShapeLagrange, _ek_cohesive> MyFEMCohesiveType;
SolidMechanicsModelCohesive(Mesh & mesh,
UInt spatial_dimension = _all_dimensions,
const ID & id = "solid_mechanics_model_cohesive",
const MemoryID & memory_id = 0);
virtual ~SolidMechanicsModelCohesive();
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/// set the value of the time step
void setTimeStep(Real time_step);
/// assemble the residual for the explicit scheme
virtual void updateResidual(bool need_initialize = true);
/// function to print the contain of the class
virtual void printself(std::ostream & stream, int indent = 0) const;
/// function to perform a stress check on each facet and insert
/// cohesive elements if needed
void checkCohesiveStress();
/// initialize the cohesive model
void initFull(const ModelOptions & options = default_solid_mechanics_model_cohesive_options);
/// initialize the model
void initModel();
/// initialize cohesive material
void initMaterials();
/// init facet filters for cohesive materials
void initFacetFilter();
/// limit the cohesive element insertion to a given area
void enableFacetsCheckOnArea(const Array<Real> & limits);
/// update automatic insertion after a change in the element inserter
void updateAutomaticInsertion();
private:
/// initialize completely the model for extrinsic elements
void initAutomaticInsertion();
/// initialize stress interpolation
void initStressInterpolation();
/// compute facets' normals
void computeNormals();
/// resize facet stress
void resizeFacetStress();
/// init facets_check array
void initFacetsCheck();
/// fill stress_on_facet
void fillStressOnFacet();
/// compute average stress on elements
void averageStressOnFacets(UInt material_index);
/* ------------------------------------------------------------------------ */
/* Mesh Event Handler inherited members */
/* ------------------------------------------------------------------------ */
protected:
virtual void onNodesAdded (const Array<UInt> & nodes_list,
const NewNodesEvent & event);
virtual void onElementsAdded (const Array<Element> & nodes_list,
const NewElementsEvent & event);
/* ------------------------------------------------------------------------ */
/* SolidMechanicsModelEventHandler inherited members */
/* ------------------------------------------------------------------------ */
public:
virtual void onEndSolveStep(const AnalysisMethod & method);
/* ------------------------------------------------------------------------ */
/* Dumpable interface */
/* ------------------------------------------------------------------------ */
public:
virtual void addDumpFieldToDumper(const std::string & dumper_name,
const std::string & field_id);
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
/// get facet mesh
AKANTU_GET_MACRO(MeshFacets, mesh_facets, const Mesh &);
/// get stress on facets vector
AKANTU_GET_MACRO_BY_ELEMENT_TYPE_CONST(StressOnFacets, facet_stress, Real);
/// get facet material
AKANTU_GET_MACRO_BY_ELEMENT_TYPE(FacetMaterial, facet_material, UInt);
/// get facet material
AKANTU_GET_MACRO_BY_ELEMENT_TYPE_CONST(FacetMaterial, facet_material, UInt);
/// get facet material
AKANTU_GET_MACRO(FacetMaterial, facet_material, const ByElementTypeArray<UInt> &);
/// @todo THIS HAS TO BE CHANGED
AKANTU_GET_MACRO_BY_ELEMENT_TYPE_CONST(Tangents, tangents, Real);
/// get element inserter
AKANTU_GET_MACRO_NOT_CONST(ElementInserter, inserter, CohesiveElementInserter &);
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
private:
/// mesh containing facets and their data structures
Mesh & mesh_facets;
/// @todo store tangents when normals are computed:
ByElementTypeReal tangents;
/// list of stresses on facet quadrature points for every element
ByElementTypeReal stress_on_facet;
/// stress on facets on the two sides by quadrature point
ByElementTypeReal facet_stress;
/// flag to know if facets have been generated
bool facet_generated;
/// material to use if a cohesive element is created on a facet
ByElementTypeUInt facet_material;
/// stress interpolation flag
bool stress_interpolation;
bool is_extrinsic;
/// cohesive element inserter
CohesiveElementInserter inserter;
#if defined(AKANTU_PARALLEL_COHESIVE_ELEMENT)
#include "solid_mechanics_model_cohesive_parallel.hh"
#endif
};
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
#if defined (AKANTU_PARALLEL_COHESIVE_ELEMENT)
# include "solid_mechanics_model_cohesive_inline_impl.cc"
#endif
/* -------------------------------------------------------------------------- */
class DefaultMaterialCohesiveSelector : public DefaultMaterialSelector {
public:
DefaultMaterialCohesiveSelector(const SolidMechanicsModelCohesive & model) :
DefaultMaterialSelector(model.getElementIndexByMaterial()),
facet_material(model.getFacetMaterial()),
mesh(model.getMesh()),
mesh_facets(model.getMeshFacets()) { }
inline virtual UInt operator()(const Element & element) {
if(Mesh::getKind(element.type) == _ek_cohesive) {
try {
const Array<Element> & cohesive_el_to_facet
= mesh_facets.getSubelementToElement(element.type, element.ghost_type);
bool third_dimension = (mesh.getSpatialDimension() == 3);
const Element & facet = cohesive_el_to_facet(element.element, third_dimension);
return facet_material(facet.type, facet.ghost_type)(facet.element);
} catch(...) {
return MaterialSelector::operator()(element);
}
} else if (Mesh::getSpatialDimension(element.type) == mesh.getSpatialDimension() - 1) {
return facet_material(element.type, element.ghost_type)(element.element);
} else {
return DefaultMaterialSelector::operator()(element);
}
}
private:
const ByElementTypeUInt & facet_material;
const Mesh & mesh;
const Mesh & mesh_facets;
};
/// standard output stream operator
inline std::ostream & operator <<(std::ostream & stream, const SolidMechanicsModelCohesive & _this)
{
_this.printself(stream);
return stream;
}
__END_AKANTU__
#endif /* __AKANTU_SOLID_MECHANICS_MODEL_COHESIVE_HH__ */

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