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material_viscoelastic.hh
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/**
* @file material_viscoelastic.hh
* @author Vlad Yastrebov <vladislav.yastrebov@epfl.ch>
* @date Thu Feb 7 2012
*
* @brief Material Visco-elastic, based on Standard Solid rheological model, see [] J.C. Simo, T.J.R. Hughes, "Computational Inelasticity", Springer (1998), see Sections 10.2 and 10.3
*
* @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_VISCOELASTIC_HH__
#define __AKANTU_MATERIAL_VISCOELASTIC_HH__
__BEGIN_AKANTU__
/**
* Material viscoelastic (caughey condition) 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)
* - eta : viscosity
* - Ev : stiffness of the viscous element
* - h : internal variable of the integral history
*/
class MaterialViscoElastic : public MaterialElastic {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
MaterialViscoElastic(Model & model, const ID & id = "");
virtual ~MaterialViscoElastic() {};
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
void initMaterial();
virtual bool setParam(const std::string & key, const std::string & value,
const ID & id);
/// constitutive law for all element of a type
void computeStress(ElementType el_type, GhostType ghost_type = _not_ghost);
/// 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);
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
AKANTU_GET_MACRO_BY_ELEMENT_TYPE_CONST(HistoryIntegral, history_integral, Real);
AKANTU_GET_MACRO_BY_ELEMENT_TYPE_CONST(StressDev, stress_dev, Real);
AKANTU_GET_MACRO(EV, Ev, const Real&);
AKANTU_SET_MACRO(EV, Ev, Real &);
AKANTU_GET_MACRO(Eta, eta, const Real&);
AKANTU_SET_MACRO(Eta, eta, Real &);
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
private:
/// stress due to viscosity
// ByElementTypeReal stress_viscosity;
/// stress due to elasticity
// ByElementTypeReal stress_elastic;
/// viscosity, viscous elastic modulus
Real eta, Ev;
/// history of deviatoric stress
ByElementTypeReal stress_dev;
/// Internal variable: history integral
ByElementTypeReal history_integral;
};
/* -------------------------------------------------------------------------- */
/* __aka_inline__ functions */
/* -------------------------------------------------------------------------- */
//#include "material_elastic_caughey_inline_impl.cc"
/* -------------------------------------------------------------------------- */
/// standard output stream operator
/*
inline std::ostream & operator <<(std::ostream & stream, const MaterialViscoElastic & _this)
{
_this.printself(stream);
return stream;
}
*/
__END_AKANTU__
#endif /* __AKANTU_MATERIAL_VISCOELASTIC_HH__ */

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