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material_damage_iterative.hh
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Wed, May 1, 18:20

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.
*
*
* 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.hh"
#include "material_damage.hh"
/* -------------------------------------------------------------------------- */
#ifndef AKANTU_MATERIAL_DAMAGE_ITERATIVE_HH_
#define AKANTU_MATERIAL_DAMAGE_ITERATIVE_HH_
namespace 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 = "");
~MaterialDamageIterative() override = default;
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/// virtual void updateInternalParameters();
void computeAllStresses(GhostType ghost_type = _not_ghost) override;
/// update internal field damage
virtual UInt updateDamage();
UInt updateDamage(UInt quad_index, Real eq_stress,
ElementType el_type, GhostType ghost_type);
/// update energies after damage has been updated
void updateEnergiesAfterDamage(ElementType el_type) override;
/// 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);
protected:
/// constitutive law for all element of a type
void computeStress(ElementType el_type,
GhostType ghost_type = _not_ghost) override;
inline void computeDamageAndStressOnQuad(Matrix<Real> & sigma, Real & dam);
/* ------------------------------------------------------------------------ */
/* DataAccessor inherited members */
/* ------------------------------------------------------------------------ */
inline UInt getNbData(const Array<Element> & elements,
const SynchronizationTag & tag) const override;
inline void packData(CommunicationBuffer & buffer,
const Array<Element> & elements,
const SynchronizationTag & tag) const override;
inline void unpackData(CommunicationBuffer & buffer,
const Array<Element> & elements,
const SynchronizationTag & tag) override;
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
/// get max normalized equivalent stress
AKANTU_GET_MACRO(NormMaxEquivalentStress, norm_max_equivalent_stress, Real);
/// get a non-const reference to the max normalized equivalent stress
AKANTU_GET_MACRO_NOT_CONST(NormMaxEquivalentStress,
norm_max_equivalent_stress, Real &);
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected:
/// resistance to damage
RandomInternalField<Real> Sc;
/// the reduction
InternalField<UInt> reduction_step;
/// internal field to store equivalent stress on each Gauss point
InternalField<Real> equivalent_stress;
/// the number of total reductions steps until complete failure
UInt max_reductions;
/// 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;
};
} // namespace akantu
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
#include "material_damage_iterative_inline_impl.hh"
#endif /* AKANTU_MATERIAL_DAMAGE_ITERATIVE_HH_ */

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