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material_neohookean.hh
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/**
* @file material_neohookean.hh
*
* @author Marion Estelle Chambart <marion.chambart@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date Wed Jun 15 10:45:12 2011
*
* @brief Material Neo Hookean
*
* @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_elastic.hh"
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_MATERIAL_NEOHOOKEAN_HH__
#define __AKANTU_MATERIAL_NEOHOOKEAN_HH__
__BEGIN_AKANTU__
/**
* Material elastic isotropic
*
* parameters in the material files :
* - rho : density (default: 0)
* - E : Young's modulus (default: 0)
* - nu : Poisson's ratio (default: 1/2)
* - Plain_Stress : if 0: plain strain, else: plain stress (default: 0)
*/
template<UInt spatial_dimension>
class MaterialNeohookean : public MaterialElastic<spatial_dimension> {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
MaterialNeohookean(SolidMechanicsModel & model, const ID & id = "");
virtual ~MaterialNeohookean() {};
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/// constitutive law for all element of a type
void computeStress(ElementType el_type, GhostType ghost_type = _not_ghost);
/// compute the tangent stiffness matrix for an element type
void computeTangentModuli(const ElementType & el_type,
Array<Real> & tangent_matrix,
GhostType ghost_type = _not_ghost);
/// compute the potential energy for all elements
virtual void computePotentialEnergy(ElementType el_type, GhostType ghost_type = _not_ghost);
private:
/// compute the celerity of wave in the material
Real celerity(const Element & element);
/// compute the potential energy for on element
inline void computePotentialEnergyOnQuad(Matrix<Real> & grad_u,
Real & epot);
protected:
/// constitutive law for a given quadrature point
inline void computeStressOnQuad(Matrix<Real> & grad_u,
Matrix<Real> & sigma);
// /// compute the tangent stiffness matrix for an element
void computeTangentModuliOnQuad(Matrix<Real> & grad_u,
Matrix<Real> & tangent);
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
/// get the stable time step
inline Real getStableTimeStep(Real h, const Element & element);
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected:
};
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
#include "material_neohookean_inline_impl.cc"
__END_AKANTU__
#endif /* __AKANTU_MATERIAL_NEOHOOKEAN_HH__ */
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