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material_cohesive_bilinear.hh
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material_cohesive_bilinear.hh
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/**
* @file material_cohesive_bilinear.hh
*
* @author Marco Vocialta <marco.vocialta@epfl.ch>
*
* @date creation: Fri Jun 18 2010
* @date last modification: Sun Dec 03 2017
*
* @brief Bilinear cohesive constitutive law
*
*
* Copyright (©) 2010-2018 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 "material_cohesive_linear.hh"
#ifndef AKANTU_MATERIAL_COHESIVE_BILINEAR_HH_
#define AKANTU_MATERIAL_COHESIVE_BILINEAR_HH_
/* -------------------------------------------------------------------------- */
namespace akantu {
/**
* Cohesive material bilinear
*
* parameters in the material files :
* - delta_0 : elastic limit displacement (default: 0)
* - sigma_c : critical stress sigma_c (default: 0)
* - beta : weighting parameter for sliding and normal opening (default:
* 0)
* - G_cI : fracture energy for mode I (default: 0)
* - G_cII : fracture energy for mode II (default: 0)
* - penalty : stiffness in compression to prevent penetration
*/
template <UInt spatial_dimension>
class MaterialCohesiveBilinear
: public MaterialCohesiveLinear<spatial_dimension> {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
MaterialCohesiveBilinear(SolidMechanicsModel & model, const ID & id = "");
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/// initialize the material computed parameter
void initMaterial() override;
/// set material parameters for new elements
void onElementsAdded(const Array<Element> & element_list,
const NewElementsEvent & event) override;
protected:
/// constitutive law
void computeTraction(const Array<Real> & normal, ElementType el_type,
GhostType ghost_type = _not_ghost) override;
/**
* Scale traction sigma_c according to the volume of the
* two elements surrounding an element
*/
void scaleTraction(const Element & el, Vector<Real> & sigma_c_vec);
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected:
/// elastic limit displacement
Real delta_0;
};
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
//#include "material_cohesive_elastic_inline_impl.hh"
} // namespace akantu
#endif /* AKANTU_MATERIAL_COHESIVE_BILINEAR_HH_ */

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