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Fri, May 17, 12:41

material_vreepeerlings.hh
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/**
* @file material_vreepeerlings.hh
*
* @author Cyprien Wolff <cyprien.wolff@epfl.ch>
*
* @date Fri Feb 24 14:27:15 2012
*
* @brief Specialization of the material class for the VreePeerlings material
*
* @section LICENSE
*
* Copyright (©) 2010-2011 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "aka_common.hh"
#include "material.hh"
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_MATERIAL_VREEPEERLINGS_HH__
#define __AKANTU_MATERIAL_VREEPEERLINGS_HH__
__BEGIN_AKANTU__
/**
* Material vreepeerlings
*
* parameters in the material files :
* - Kapa0i : (default: 0.0001) Initial threshold (of the equivalent strain) for the initial step
* - Kapa0 : (default: 0.0001) Initial threshold (of the equivalent strain)
* - Alpha : (default: 0.99) Fitting parameter (must be close to 1 to do tend to 0 the stress in the damaged element)
* - Beta : (default: 300) This parameter determines the rate at which the damage grows
* - Kct : (default: 1) Ratio between compressive and tensile strength
* - Kapa0_randomness : (default:0) Kapa random internal variable
*/
template<UInt spatial_dimension>
class MaterialVreePeerlings : public MaterialDamage<spatial_dimension> {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
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(types::RMatrix & F,
types::RMatrix & sigma,
Real & dam,
Real & Equistrain_rate,
Real & Equistrain,
Real & Kapaq,
Real dt,
types::RMatrix & strain_rate_vrpgls,
Real & crit_strain);
inline void computeDamageAndStressOnQuad(types::RMatrix & sigma,
Real & dam,
Real & Equistrain_rate,
Real & Equistrain,
Real & Kapaq,
Real dt,
Real & crit_strain);
/* ------------------------------------------------------------------------ */
/* DataAccessor inherited members */
/* ------------------------------------------------------------------------ */
public:
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected:
/// Initial threshold (of the equivalent strain) (used in the initial step)
Real Kapa0i;
/// Initial threshold (of the equivalent strain)
Real Kapa0;
/// Fitting parameter (must be close to 1 to do tend to 0 the stress in the damaged element)
Real Alpha;
/// This parameter determines the rate at which the damage grows
Real Beta;
/// Ratio between compressive and tensile strength
Real Kct;
/// randomness on Kapa0
Real Kapa0_randomness;
/// Kapa random internal variable
ByElementTypeReal Kapa;
/// strain_rate_vreepeerlings
ByElementTypeReal strain_rate_vreepeerlings;
/// strain_critical_vreepeerlings
ByElementTypeReal critical_strain;
/// Booleen to check the first step
bool firststep;
/// counter for initial step
Int countforinitialstep;
};
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
#include "material_vreepeerlings_inline_impl.cc"
__END_AKANTU__
#endif /* __AKANTU_MATERIAL_VREEPEERLINGS_HH__ */

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