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material_damage_iterative.hh
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Fri, Dec 27, 12:21

material_damage_iterative.hh
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/**
* @file material_damage_iterative.hh
*
* @author Aurelia Isabel Cuba Ramos <aurelia.cubaramos@epfl.ch>
*
*
* @brief Specialization of the class material damage to damage only one gauss
* point at a time and propagate damage in a linear way. Max principal stress
* criterion is used as a failure criterion.
*
* @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_damage.hh"
#include "material.hh"
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_MATERIAL_DAMAGE_ITERATIVE_HH__
#define __AKANTU_MATERIAL_DAMAGE_ITERATIVE_HH__
__BEGIN_AKANTU__
/**
* Material damage iterative
*
* parameters in the material files :
* - Sc
*/
template<UInt spatial_dimension>
class MaterialDamageIterative : public MaterialDamage<spatial_dimension> {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
MaterialDamageIterative(SolidMechanicsModel & model, const ID & id = "");
virtual ~MaterialDamageIterative() {};
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/// virtual void updateInternalParameters();
virtual void computeAllStresses(GhostType ghost_type = _not_ghost);
/// update internal field damage
UInt updateDamage();
UInt updateDamage(UInt quad_index, const Real eq_stress, const ElementType & el_type, const 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
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);
/* ------------------------------------------------------------------------ */
/* DataAccessor inherited members */
/* ------------------------------------------------------------------------ */
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
/// get max normalized equivalent stress
AKANTU_GET_MACRO(NormMaxEquivalentStress, norm_max_equivalent_stress, Real);
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected:
/// resistance to damage
RandomInternalField<Real> Sc;
/// internal field to store equivalent stress on each Gauss point
InternalField<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_damage_iterative_inline_impl.cc"
__END_AKANTU__
#endif /* __AKANTU_MATERIAL_DAMAGE_ITERATIVE_HH__ */

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