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material_mazars.hh
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/**
* @file material_mazars.hh
*
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
* @author Marion Estelle Chambart <marion.chambart@epfl.ch>
* @author Marion Estelle Chambart <mchambart@stucky.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Fri Jun 18 2010
* @date last modification: Fri Jul 24 2020
*
* @brief Material Following the Mazars law for damage evolution
*
*
* @section LICENSE
*
* Copyright (©) 2010-2021 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"
#include "material_damage.hh"
/* -------------------------------------------------------------------------- */
#ifndef AKANTU_MATERIAL_MAZARS_HH_
#define AKANTU_MATERIAL_MAZARS_HH_
namespace akantu {
/**
* Material Mazars
*
* parameters in the material files :
* - rho : density (default: 0)
* - E : Young's modulus (default: 0)
* - nu : Poisson's ratio (default: 1/2)
* - K0 : Damage threshold
* - At : Parameter damage traction 1
* - Bt : Parameter damage traction 2
* - Ac : Parameter damage compression 1
* - Bc : Parameter damage compression 2
* - beta : Parameter for shear
*/
template <UInt spatial_dimension>
class MaterialMazars : public MaterialDamage<spatial_dimension> {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
MaterialMazars(SolidMechanicsModel & model, const ID & id = "");
~MaterialMazars() override = default;
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/// constitutive law for all element of a type
void computeStress(ElementType el_type,
GhostType ghost_type = _not_ghost) override;
protected:
/// constitutive law for a given quadrature point
inline void computeStressOnQuad(const Matrix<Real> & grad_u,
Matrix<Real> & sigma, Real & damage,
Real & Ehat);
inline void computeDamageAndStressOnQuad(const Matrix<Real> & grad_u,
Matrix<Real> & sigma, Real & damage,
Real & Ehat);
inline void computeDamageOnQuad(const Real & epsilon_equ,
const Matrix<Real> & sigma,
const Vector<Real> & epsilon_princ,
Real & dam);
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected:
/// damage threshold
RandomInternalField<Real> K0;
/// parameter damage traction 1
Real At;
/// parameter damage traction 2
Real Bt;
/// parameter damage compression 1
Real Ac;
/// parameter damage compression 2
Real Bc;
/// parameter for shear
Real beta;
/// specify the variable to average false = ehat, true = damage (only valid
/// for non local version)
bool damage_in_compute_stress;
};
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
} // namespace akantu
#include "material_mazars_inline_impl.hh"
#endif /* AKANTU_MATERIAL_MAZARS_HH_ */

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