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material_vreepeerlings.hh
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/**
* @file material_vreepeerlings.hh
*
* @author Cyprien Wolff <cyprien.wolff@epfl.ch>
*
*
* @brief Specialization of the material class for the VreePeerlings material
*
* @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"
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_MATERIAL_VREEPEERLINGS_HH__
#define __AKANTU_MATERIAL_VREEPEERLINGS_HH__
namespace akantu {
/**
* Material vreepeerlings
*
* parameters in the material files :
* - Kapaoi : (default: 0.0001) Initial threshold (of the equivalent strain) >= Crate
* - Kapac : (default: 0.0002) Final threshold (of the equivalent strain)
* - Arate : (default: 1.) Fitting parameter (must be close to 1 to do tend to 0 the stress in the damaged element)
* - Brate : (default: 1.) This parameter determines the rate at which the damage grows
* - Crate : (default: 0.0001) This parameter determines the rate at which the damage grows
* - Kct : (default: 1.) Ratio between compressive and tensile strength
*/
template<UInt spatial_dimension, template <UInt> class MatParent = MaterialElastic>
class MaterialVreePeerlings : public MaterialDamage<spatial_dimension,
MatParent> {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
typedef MaterialDamage<spatial_dimension,
MatParent> MaterialVreePeerlingsParent;
MaterialVreePeerlings(SolidMechanicsModel & model, const ID & id = "");
virtual ~MaterialVreePeerlings() {};
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
void initMaterial();
/// constitutive law for all element of a type
void computeStress(ElementType el_type, GhostType ghost_type = _not_ghost);
protected:
/// constitutive law for a given quadrature point
inline void computeStressOnQuad(Matrix<Real> & F,
Matrix<Real> & sigma,
Real & dam,
Real & Equistrain_rate,
Real & Equistrain,
Real & Kapaq,
Real dt,
Matrix<Real> & strain_rate_vrpgls,
Real & FullDam_ValStrain,
Real & FullDam_ValStrain_rate,
Real & Nb_damage);
inline void computeDamageAndStressOnQuad(Matrix<Real> & sigma,
Real & dam,
Real & Equistrain_rate,
Real & Equistrain,
Real & Kapaq,
Real dt,
Real & FullDam_Valstrain,
Real & FullDam_Valstrain_rate,
Real & Nb_damage);
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected:
/// Initial threshold (of the equivalent strain) (used in the initial step)
Real Kapaoi;
/// Final threshold (of the equivalent strain) (used in the initial step)
Real Kapac;
/// This parameter determines the rate at which the damage grows
Real Arate;
/// This parameter determines the rate at which the damage grows
Real Brate;
/// This parameter determines the rate at which the damage grows
Real Crate;
/// Ratio between compressive and tensile strength
Real Kct;
/// Randomness on Kapaoi
Real Kapao_randomness;
/// Kapa vector which contains the initial damage threshold
RandomInternalField<Real> Kapa;
/// Strain rate tensor to compute the rate dependent damage law
InternalField<Real> strain_rate_vreepeerlings;
/// Value of the equivalent strain when damage = 1
InternalField<Real> Full_dam_value_strain;
/// Value of the equivalent strain rate when damage = 1
InternalField<Real> Full_dam_value_strain_rate;
/// Count the number of times that the material is damaged to damage = 0 until damage = 1
InternalField<Real> Number_damage;
/// Equivalent strain used to compute the damage evolution
InternalField<Real> equi_strain;
/// Equivalent strain rate used to compute the damage evolution
InternalField<Real> equi_strain_rate;
};
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
#include "material_vreepeerlings_inline_impl.cc"
#include "material_vreepeerlings_tmpl.hh"
} // namespace akantu
#endif /* __AKANTU_MATERIAL_VREEPEERLINGS_HH__ */
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