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 creation: Tue May 08 2012
	* @date last modification: Tue Sep 02 2014
	*
	* @brief Solid mechanics model for cohesive elements
	*
	* @section LICENSE
	*
	* Copyright (©) 2014 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 stress_interpolation = true) :
	SolidMechanicsModelOptions(analysis_method, no_init_materials),
	extrinsic(extrinsic),
	stress_interpolation(stress_interpolation) {}
	bool extrinsic;
	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 FEEngineTemplate<IntegratorGauss, ShapeLagrange, _ek_cohesive> MyFEEngineCohesiveType;

	SolidMechanicsModelCohesive(Mesh & mesh,
	UInt spatial_dimension = _all_dimensions,
	const ID & id = "solid_mechanics_model_cohesive",
	const MemoryID & memory_id = 0);

	virtual ~SolidMechanicsModelCohesive();

	/* ------------------------------------------------------------------------ */
	/* Methods */
	/* ------------------------------------------------------------------------ */
	public:

	/// reassigns materials depending on the material selector
	virtual void reassignMaterial();

	/// 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 limitInsertion(BC::Axis axis, Real first_limit, Real second_limit);

	/// update automatic insertion after a change in the element inserter
	void updateAutomaticInsertion();

	/// insert intrinsic cohesive elements
	void insertIntrinsicElements();

	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 onDump();

	virtual void addDumpGroupFieldToDumper(const std::string & dumper_name,
	const std::string & field_id,
	const std::string & group_name,
	const ElementKind & element_kind,
	bool padding_flag);

	/* ------------------------------------------------------------------------ */
	/* Accessors */
	/* ------------------------------------------------------------------------ */
	public:

	/// get facet mesh
	AKANTU_GET_MACRO(MeshFacets, mesh.getMeshFacets(), 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 ElementTypeMapArray<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 &);

	/// get is_extrinsic boolean
	AKANTU_GET_MACRO(IsExtrinsic, is_extrinsic, bool);

	/* ------------------------------------------------------------------------ */
	/* Class Members */
	/* ------------------------------------------------------------------------ */
	private:

	/// @todo store tangents when normals are computed:
	ElementTypeMapArray<Real> tangents;

	/// list of stresses on facet quadrature points for every element
	ElementTypeMapArray<Real> stress_on_facet;

	/// stress on facets on the two sides by quadrature point
	ElementTypeMapArray<Real> facet_stress;

	/// material to use if a cohesive element is created on a facet
	ElementTypeMapArray<UInt> 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()) { }

	inline virtual UInt operator()(const Element & element) {
	if(Mesh::getKind(element.type) == _ek_cohesive) {
	try {
	const Array<Element> & cohesive_el_to_facet
	= mesh.getMeshFacets().getSubelementToElement(element.type, element.ghost_type);
	bool third_dimension = (mesh.getSpatialDimension() == 3);
	const Element & facet = cohesive_el_to_facet(element.element, third_dimension);
	if(facet_material.exists(facet.type, facet.ghost_type)) {
	return facet_material(facet.type, facet.ghost_type)(facet.element);
	} else {
	return MaterialSelector::operator()(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 ElementTypeMapArray<UInt> & facet_material;
	const Mesh & mesh;
	};


	/// 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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