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material_igfem_saw_tooth_damage.hh
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Sat, Apr 27, 10:14

material_igfem_saw_tooth_damage.hh
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/**
* @file material_igfem_saw_tooth_damage.hh
*
* @author Aurelia Isabel Cuba Ramos <aurelia.cubaramos@epfl.ch>
*
*
* @brief Linear saw-tooth softening material model for IGFEM elements
*
*
* Copyright (©) 2010-2012, 2014 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
*/
/* -------------------------------------------------------------------------- */
#include "material_damage.hh"
#include "material_igfem_elastic.hh"
/* -------------------------------------------------------------------------- */
#ifndef AKANTU_MATERIAL_IGFEM_SAW_TOOTH_DAMAGE_HH_
#define AKANTU_MATERIAL_IGFEM_SAW_TOOTH_DAMAGE_HH_
namespace akantu {
template <UInt spatial_dimension>
class MaterialIGFEMSawToothDamage
: public MaterialDamage<spatial_dimension, MaterialIGFEMElastic> {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
private:
typedef MaterialDamage<spatial_dimension, MaterialIGFEMElastic> Parent;
public:
typedef std::pair<Element, Element> ElementPair;
MaterialIGFEMSawToothDamage(SolidMechanicsModel & model, const ID & id = "");
MaterialIGFEMSawToothDamage(SolidMechanicsModel & model, UInt dim,
const Mesh & mesh, FEEngine & fe_engine,
const ID & id = "");
virtual ~MaterialIGFEMSawToothDamage() {}
protected:
void initialize();
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
virtual void initMaterial();
/// virtual void updateInternalParameters();
virtual void computeAllStresses(GhostType ghost_type = _not_ghost);
/// update internal field damage
virtual UInt updateDamage();
UInt updateDamage(UInt quad_index, const Real eq_stress, ElementType el_type,
GhostType ghost_type);
/// update energies after damage has been updated
// virtual void updateEnergiesAfterDamage(ElementType el_type, GhostType
// ghost_typ);
virtual void onBeginningSolveStep(const AnalysisMethod & method){};
virtual void onEndSolveStep(const AnalysisMethod & method){};
protected:
/// constitutive law for all element of a type
virtual void computeStress(ElementType el_type,
GhostType ghost_type = _not_ghost);
/// compute the equivalent stress on each Gauss point (i.e. the max prinicpal
/// stress) and normalize it by the tensile strength
virtual void
computeNormalizedEquivalentStress(const Array<Real> & grad_u,
ElementType el_type,
GhostType ghost_type = _not_ghost);
/// find max normalized equivalent stress
void findMaxNormalizedEquivalentStress(ElementType el_type,
GhostType ghost_type = _not_ghost);
inline void computeDamageAndStressOnQuad(Matrix<Real> & sigma, Real & dam);
protected:
/* ------------------------------------------------------------------------ */
/* MeshEventHandler inherited members */
/* ------------------------------------------------------------------------ */
public:
/* ------------------------------------------------------------------------ */
virtual void onElementsAdded(const Array<Element> & element_list,
const NewElementsEvent & event);
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
/// get max normalized equivalent stress
AKANTU_GET_MACRO(NormMaxEquivalentStress, norm_max_equivalent_stress, Real);
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected:
/// resistance to damage
IGFEMInternalField<Real> Sc;
/// internal field to store equivalent stress on each Gauss point
IGFEMInternalField<Real> equivalent_stress;
/// damage increment
Real prescribed_dam;
/// maximum equivalent stress
Real norm_max_equivalent_stress;
/// deviation from max stress at which Gauss point will still get damaged
Real dam_tolerance;
/// define damage threshold at which damage will be set to 1
Real dam_threshold;
/// maximum damage value
Real max_damage;
};
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
#include "material_igfem_saw_tooth_damage_inline_impl.hh"
} // namespace akantu
#endif /* AKANTU_MATERIAL_IGFEM_SAW_TOOTH_DAMAGE_HH_ */

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