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material_igfem_elastic.hh
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Sat, Nov 2, 14:06

material_igfem_elastic.hh
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/**
* @file element_class_igfem.hh
*
* @author Aurelia Isabel Cuba Ramos <aurelia.cubaramos@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
*
* @brief Material isotropic elastic for IGFEM
*
* @section LICENSE
*
* Copyright (©) 2010-2012, 2014 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
*/
/* -------------------------------------------------------------------------- */
#include "aka_common.hh"
#include "material_igfem.hh"
#include "plane_stress_toolbox.hh"
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_MATERIAL_IGFEM_ELASTIC_HH__
#define __AKANTU_MATERIAL_IGFEM_ELASTIC_HH__
__BEGIN_AKANTU__
/**
* Material elastic isotropic
*
* parameters in the material files :
* - E : Young's modulus (default: 0)
* - nu : Poisson's ratio (default: 1/2)
* - Plane_Stress : if 0: plane strain, else: plane stress (default: 0)
*/
template<UInt spatial_dimension>
class MaterialIGFEMElastic : public PlaneStressToolbox< spatial_dimension,
MaterialIGFEM > {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
private:
typedef PlaneStressToolbox< spatial_dimension, MaterialIGFEM > Parent;
public:
MaterialIGFEMElastic(SolidMechanicsModel & model, const ID & id = "");
MaterialIGFEMElastic(SolidMechanicsModel & model,
UInt dim,
const Mesh & mesh,
FEEngine & fe_engine,
const ID & id = "");
virtual ~MaterialIGFEMElastic() {}
protected:
void initialize();
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
virtual void initMaterial();
/// constitutive law for all element of a type
virtual void computeStress(ElementType el_type, GhostType ghost_type = _not_ghost);
/// compute the tangent stiffness matrix for an element type
virtual void computeTangentModuli(const ElementType & el_type,
Array<Real> & tangent_matrix,
GhostType ghost_type = _not_ghost);
/// compute the elastic potential energy
virtual void computePotentialEnergy(ElementType el_type,
GhostType ghost_type = _not_ghost);
virtual void computePotentialEnergyByElement(ElementType type, UInt index,
Vector<Real> & epot_on_quad_points);
void updateElasticInternals(GhostType ghost_type = _not_ghost);
protected:
void updateElasticConstants(Vector<Real> & lambda_vec, Vector<Real> & mu_vec, Vector<Real> & kpa_vec);
/// constitutive law for a given quadrature point
inline void computeStressOnQuad(const Matrix<Real> & grad_u,
Matrix<Real> & sigma,
__attribute__((unused)) const Real lambda,
const Real mu) const;
/// compute the tangent stiffness matrix for an element
inline void computeTangentModuliOnQuad(Matrix<Real> & tangent,
__attribute__((unused)) const Real lambda,
const Real mu) const;
static inline void computePotentialEnergyOnQuad(const Matrix<Real> & grad_u,
const Matrix<Real> & sigma,
Real & epot);
/* ------------------------------------------------------------------------ */
/* MeshEventHandler inherited members */
/* ------------------------------------------------------------------------ */
public:
/* ------------------------------------------------------------------------ */
virtual void onElementsAdded(const Array<Element> & element_list,
const NewElementsEvent & event);
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected:
/// the Young's moduli for the different sub-materials
Vector<Real> E;
/// Poisson ratios for the different sub-materials
Vector<Real> nu;
/// First Lamé coefficient
IGFEMInternalField<Real> lambda;
/// Second Lamé coefficient (shear modulus)
IGFEMInternalField<Real> mu;
/// Bulk modulus
IGFEMInternalField<Real> kpa;
};
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
#include "material_igfem_elastic_inline_impl.cc"
__END_AKANTU__
#endif /* __AKANTU_MATERIAL_IGFEM_ELASTIC_HH__ */

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