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material_cohesive_exponential.hh
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rAKA akantu
material_cohesive_exponential.hh
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/**
* @file material_cohesive_exponential.hh
*
* @author Fabian Barras <fabian.barras@epfl.ch>
* @author Seyedeh Mohadeseh Taheri Mousavi <mohadeseh.taherimousavi@epfl.ch>
* @author Marco Vocialta <marco.vocialta@epfl.ch>
*
* @date creation: Fri Jun 18 2010
* @date last modification: Sun Dec 03 2017
*
* @brief Exponential irreversible cohesive law of mixed mode loading
*
* @section LICENSE
*
* 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_cohesive.hh"
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_MATERIAL_COHESIVE_EXPONENTIAL_HH__
#define __AKANTU_MATERIAL_COHESIVE_EXPONENTIAL_HH__
/* -------------------------------------------------------------------------- */
namespace
akantu
{
/**
* Cohesive material Exponential damage
*
* parameters in the material files :
* - sigma_c : critical stress sigma_c (default: 0)
* - beta : weighting parameter for sliding and normal opening (default:
* 0)
* - delta_c : critical opening (default: 0)
*/
template
<
UInt
spatial_dimension
>
class
MaterialCohesiveExponential
:
public
MaterialCohesive
{
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public
:
MaterialCohesiveExponential
(
SolidMechanicsModel
&
model
,
const
ID
&
id
=
""
);
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
protected
:
/// Initialization
void
initMaterial
()
override
;
/// constitutive law
void
computeTraction
(
const
Array
<
Real
>
&
normal
,
ElementType
el_type
,
GhostType
ghost_type
=
_not_ghost
)
override
;
/// compute the tangent stiffness matrix for an element type
void
computeTangentTraction
(
const
ElementType
&
el_type
,
Array
<
Real
>
&
tangent_matrix
,
const
Array
<
Real
>
&
normal
,
GhostType
ghost_type
=
_not_ghost
)
override
;
private
:
void
computeCoupledTraction
(
Vector
<
Real
>
&
tract
,
const
Vector
<
Real
>
&
normal
,
Real
delta
,
const
Vector
<
Real
>
&
opening
,
Real
&
delta_max_new
,
Real
delta_max
);
void
computeCompressiveTraction
(
Vector
<
Real
>
&
tract
,
const
Vector
<
Real
>
&
normal
,
Real
delta_n
,
const
Vector
<
Real
>
&
opening
);
void
computeCoupledTangent
(
Matrix
<
Real
>
&
tangent
,
const
Vector
<
Real
>
&
normal
,
Real
delta
,
const
Vector
<
Real
>
&
opening
,
Real
delta_max_new
);
void
computeCompressivePenalty
(
Matrix
<
Real
>
&
tangent
,
const
Vector
<
Real
>
&
normal
,
Real
delta_n
);
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public
:
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected
:
/// beta parameter
Real
beta
;
/// contact penalty = initial slope ?
bool
exp_penalty
;
/// Ratio of contact tangent over the initial exponential tangent
Real
contact_tangent
;
};
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
// #include "material_cohesive_exponential_inline_impl.cc"
}
// namespace akantu
#endif
/* __AKANTU_MATERIAL_COHESIVE_EXPONENTIAL_HH__ */
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