structural_mechanics_model.hh
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structural_mechanics_model.hh
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	/**
	* @file structural_mechanics_model.hh
	*
	* @author Fabian Barras <fabian.barras@epfl.ch>
	*
	* @date Fri Jul 15 19:41:58 2011
	*
	* @brief StructuralMechanicsModel 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/>.
	*
	*/

	/* -------------------------------------------------------------------------- */

	#ifndef __AKANTU_STRUCTURAL_MECHANICS_MODEL_HH__
	#define __AKANTU_STRUCTURAL_MECHANICS_MODEL_HH__

	/* -------------------------------------------------------------------------- */
	#include "aka_common.hh"
	#include "model.hh"
	#include "integrator_gauss.hh"
	#include "shape_linked.hh"
	#include "aka_types.hh"

	/* -------------------------------------------------------------------------- */
	namespace akantu {
	class Solver;
	class SparseMatrix;
	}

	__BEGIN_AKANTU__


	struct StructuralMaterial {
	Real E;
	Real A;
	Real I;
	};

	class StructuralMechanicsModel : public Model {
	/* ------------------------------------------------------------------------ */
	/* Constructors/Destructors */
	/* ------------------------------------------------------------------------ */
	public:

	typedef FEMTemplate<IntegratorGauss,ShapeLinked> MyFEMType;

	StructuralMechanicsModel(UInt spatial_dimension,
	const ID & id = "structural_mechanics_model",
	const MemoryID & memory_id = 0);

	StructuralMechanicsModel(Mesh & mesh,
	UInt spatial_dimension = 0,
	const ID & id = "structural_mechanics_model",
	const MemoryID & memory_id = 0);

	virtual ~StructuralMechanicsModel();

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

	void initVectors();
	void initModel();
	void initImplicitSolver();
	void computeStressOnQuad();
	void assembleStiffnessMatrix();
	void updateResidual();
	void solve();
	bool testConvergenceIncrement(Real tolerance);
	bool testConvergenceIncrement(Real tolerance, Real & error);
	virtual void printself(__attribute__ ((unused)) std::ostream & stream,
	__attribute__ ((unused)) int indent = 0) const {};
	UInt getTangentStiffnessVoigtSize(const ElementType & type);

	/* ------------------------------------------------------------------------ */

	private:
	template<ElementType type>
	inline UInt getTangentStiffnessVoigtSize();

	template <ElementType type>
	void assembleStiffnessMatrix();

	template<ElementType type>
	void computeStressOnQuad();

	template <ElementType type>
	void computeTangentStiffness(Vector<Real> & tangent_stiffness_matrix);

	template <ElementType type>
	void transferBMatrixToSymVoigtBMatrix(Vector<Real> & B);

	/* ------------------------------------------------------------------------ */
	/* Accessors */
	/* ------------------------------------------------------------------------ */
	public:
	/// return the dimension of the system space
	AKANTU_GET_MACRO(SpatialDimension, spatial_dimension, UInt);

	/// get the StructuralMechanicsModel::displacement vector
	AKANTU_GET_MACRO(Displacement, *displacement_rotation, Vector<Real> &);

	/// get the StructuralMechanicsModel::force vector (boundary forces)
	AKANTU_GET_MACRO(Force, *force_momentum, Vector<Real> &);

	/// get the StructuralMechanicsModel::residual vector, computed by StructuralMechanicsModel::updateResidual
	AKANTU_GET_MACRO(Residual, *residual, const Vector<Real> &);
	/// get the StructuralMechanicsModel::boundary vector
	AKANTU_GET_MACRO(Boundary, *boundary, Vector<bool> &);

	AKANTU_GET_MACRO(StiffnessMatrix, *stiffness_matrix, const SparseMatrix &);

	AKANTU_GET_MACRO_BY_ELEMENT_TYPE_CONST(Stress, stress, Real);

	AKANTU_GET_MACRO_BY_ELEMENT_TYPE(ElementMaterial, element_material, UInt)

	void addMaterial(StructuralMaterial & material) { materials.push_back(material); }

	/* ------------------------------------------------------------------------ */
	/* Boundaries (structural_mechanics_model_boundary.cc) */
	/* ------------------------------------------------------------------------ */
	public:
	/// !!NOT IMPLEMENTED YET!!
	void computeForcesByStressTensor(const Vector<Real> & stresses,
	const ElementType & type);

	/// integrate a force on the boundary by providing a traction vector
	void computeForcesByTractionVector(const Vector<Real> & tractions,
	const ElementType & type);

	/// compute force vector from a function(x,y,momentum) that describe stresses
	void computeForcesFromFunction(BoundaryFunction in_function,
	BoundaryFunctionType function_type);

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

	/// displacements array
	Vector<Real> * displacement_rotation;

	/// forces array
	Vector<Real> * force_momentum;

	/// stress arraz

	ByElementTypeReal stress;

	/// residuals array
	Vector<Real> * residual;

	/// boundaries array
	Vector<bool> * boundary;

	/// position of a dof in the K matrix
	Vector<Int> * equation_number;

	ByElementTypeUInt element_material;

	/// local equation_number to global
	unordered_map<UInt, UInt>::type local_eq_num_to_global;

	/// stiffness matrix
	SparseMatrix * stiffness_matrix;

	/// increment of displacement
	Vector<Real> * increment;

	/// solver for implicit
	Solver * solver;

	/// the spatial dimension
	UInt spatial_dimension;

	/// number of degre of freedom
	UInt nb_degree_of_freedom;

	/* -------------------------------------------------------------------------- */
	std::vector<StructuralMaterial> materials;
	};


	/* -------------------------------------------------------------------------- */
	/* inline functions */
	/* -------------------------------------------------------------------------- */

	#if defined (AKANTU_INCLUDE_INLINE_IMPL)
	# include "structural_mechanics_model_inline_impl.cc"
	#endif

	/// standard output stream operator
	inline std::ostream & operator <<(std::ostream & stream, const StructuralMechanicsModel & _this)
	{
	_this.printself(stream);
	return stream;
	}


	__END_AKANTU__

	#endif /* __AKANTU_STRUCTURAL_MECHANICS_MODEL_HH__ */

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