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material_elastic.hh
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/**
* @file material_elastic.hh
* @author Nicolas Richart <nicolas.richart@epfl.ch>
* @date Thu Jul 29 15:00:59 2010
*
* @brief Material isotropic elastic
*
* @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_ELASTIC_HH__
#define __AKANTU_MATERIAL_ELASTIC_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)
* - Plane_Stress : if 0: plane strain, else: plane stress (default: 0)
*/
class MaterialElastic : public virtual Material {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
MaterialElastic(Model & model, const ID & id = "");
virtual ~MaterialElastic() {};
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
virtual void initMaterial();
virtual bool setParam(const std::string & key, const std::string & value,
const ID & id);
/// constitutive law for all element of a type
virtual void computeStress(ElementType el_type, GhostType ghost_type = _not_ghost);
/// compute the tangent stiffness matrix for an element type
void computeTangentStiffness(const ElementType & el_type,
Vector<Real> & tangent_matrix,
GhostType ghost_type = _not_ghost);
/// compute the p-wave speed in the material
virtual Real getPushWaveSpeed();
/// compute the s-wave speed in the material
virtual Real getShearWaveSpeed();
/// function to print the containt of the class
virtual void printself(std::ostream & stream, int indent = 0) const;
protected:
/// constitutive law for a given quadrature point
__aka_inline__ void computeStress(Real * F, Real * sigma);
// /// compute the tangent stiffness matrix for an element type
template<UInt dim>
void computeTangentStiffnessByDim(akantu::ElementType, akantu::Vector<Real>& tangent_matrix, akantu::GhostType);
// /// compute the tangent stiffness matrix for an element
template<UInt dim>
void computeTangentStiffness(Real * tangent);
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
/// get the stable time step
__aka_inline__ Real getStableTimeStep(Real h, const Element & element);
AKANTU_GET_MACRO(E, E, Real);
AKANTU_GET_MACRO(Nu, nu, Real);
AKANTU_GET_MACRO(Mu, mu, Real);
AKANTU_GET_MACRO(Lambda, lambda, Real);
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected:
/// the young modulus
Real E;
/// Poisson coefficient
Real nu;
/// First Lamé coefficient
Real lambda;
/// Second Lamé coefficient (shear modulus)
Real mu;
/// Bulk modulus
Real kpa;
/// Plane stress or plane strain
bool plane_stress;
};
/* -------------------------------------------------------------------------- */
/* __aka_inline__ functions */
/* -------------------------------------------------------------------------- */
#if defined (AKANTU_INCLUDE_INLINE_IMPL)
# include "material_elastic_inline_impl.cc"
#endif
/* -------------------------------------------------------------------------- */
/// standard output stream operator
inline std::ostream & operator <<(std::ostream & stream, const MaterialElastic & _this)
{
_this.printself(stream);
return stream;
}
__END_AKANTU__
#endif /* __AKANTU_MATERIAL_ELASTIC_HH__ */

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