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rAKA/src/model/solid_mechanics/materials/material_viscoelastic/material_standard_linear_solid_deviatoric.hh
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material_standard_linear_solid_deviatoric.hh
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/**
* @file material_standard_linear_solid_deviatoric.hh
*
* @author David Simon Kammer <david.kammer@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
* @author Vladislav Yastrebov <vladislav.yastrebov@epfl.ch>
*
* @date creation: Fri Jun 18 2010
* @date last modification: Sun Dec 03 2017
*
* @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
*
*
* 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 "aka_common.hh"
#include "material_elastic.hh"
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_MATERIAL_STANDARD_LINEAR_SOLID_DEVIATORIC_HH__
#define __AKANTU_MATERIAL_STANDARD_LINEAR_SOLID_DEVIATORIC_HH__
namespace akantu {
/**
* Material standard linear solid deviatoric
*
*
* @verbatim
E_\inf
------|\/\/\|------
| |
---| |---
| |
----|\/\/\|--[|----
E_v \eta
@endverbatim
*
* keyword : sls_deviatoric
*
* parameters in the material files :
* - E : Initial Young's modulus @f$ E = E_i + E_v @f$
* - eta : viscosity
* - Ev : stiffness of the viscous element
*/
template <UInt spatial_dimension>
class MaterialStandardLinearSolidDeviatoric
: public MaterialElastic<spatial_dimension> {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
MaterialStandardLinearSolidDeviatoric(SolidMechanicsModel & model,
const ID & id = "");
~MaterialStandardLinearSolidDeviatoric() override = default;
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/// initialize the material computed parameter
void initMaterial() override;
/// update the internal parameters (for modifiable parameters)
void updateInternalParameters() override;
/// set material to steady state
void setToSteadyState(ElementType el_type,
GhostType ghost_type = _not_ghost) override;
/// constitutive law for all element of a type
void computeStress(ElementType el_type,
GhostType ghost_type = _not_ghost) override;
protected:
/// update the dissipated energy, is called after the stress have been
/// computed
void updateDissipatedEnergy(ElementType el_type, GhostType ghost_type);
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
/// give the dissipated energy for the time step
Real getDissipatedEnergy() const;
Real getDissipatedEnergy(ElementType type, UInt index) const;
/// get the energy using an energy type string for the time step
Real getEnergy(const std::string & type) override;
Real getEnergy(const std::string & energy_id, ElementType type,
UInt index) override;
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
private:
/// viscosity, viscous elastic modulus
Real eta, Ev, E_inf;
Vector<Real> etas;
/// history of deviatoric stress
InternalField<Real> stress_dev;
/// Internal variable: history integral
InternalField<Real> history_integral;
/// Dissipated energy
InternalField<Real> dissipated_energy;
};
} // namespace akantu
#endif /* __AKANTU_MATERIAL_STANDARD_LINEAR_SOLID_DEVIATORIC_HH__ */
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