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test_material_damage_non_local.cc
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Wed, Aug 28, 21:07
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rAKA akantu
test_material_damage_non_local.cc
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/**
* @file test_material_damage_non_local.cc
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
* @author Clement Roux <clement.roux@epfl.ch>
*
* @date creation: Wed Aug 04 2010
* @date last modification: Thu Dec 14 2017
*
* @brief test for non-local damage materials on a 2D plate with a section gap
* the sample should break at the notch
*
*
* 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 <iostream>
/* -------------------------------------------------------------------------- */
#include "solid_mechanics_model.hh"
/* -------------------------------------------------------------------------- */
using
namespace
akantu
;
int
main
(
int
argc
,
char
*
argv
[])
{
debug
::
setDebugLevel
(
dblWarning
);
akantu
::
initialize
(
"material_damage_non_local.dat"
,
argc
,
argv
);
UInt
max_steps
=
1100
;
const
UInt
spatial_dimension
=
2
;
Mesh
mesh
(
spatial_dimension
);
mesh
.
read
(
"mesh_section_gap.msh"
);
SolidMechanicsModel
model
(
mesh
);
/// model initialization
model
.
initFull
();
Real
time_step
=
model
.
getStableTimeStep
();
model
.
setTimeStep
(
time_step
/
2.5
);
std
::
cout
<<
model
<<
std
::
endl
;
model
.
applyBC
(
BC
::
Dirichlet
::
FixedValue
(
0.0
),
"Fixed"
);
// Boundary condition (Neumann)
Matrix
<
Real
>
stress
(
2
,
2
);
stress
.
eye
(
5e8
);
model
.
applyBC
(
BC
::
Neumann
::
FromHigherDim
(
stress
),
"Traction"
);
model
.
setBaseName
(
"damage_non_local"
);
model
.
addDumpFieldVector
(
"displacement"
);
model
.
addDumpField
(
"velocity"
);
model
.
addDumpField
(
"acceleration"
);
model
.
addDumpFieldVector
(
"external_force"
);
model
.
addDumpFieldVector
(
"internal_force"
);
model
.
addDumpField
(
"damage"
);
model
.
addDumpField
(
"stress"
);
model
.
addDumpField
(
"strain"
);
model
.
dump
();
for
(
UInt
s
=
0
;
s
<
max_steps
;
++
s
)
{
model
.
solveStep
();
// if(s % 100 == 0) std::cout << "Step " << s+1 << "/" << max_steps
// <<std::endl; if(s % 100 == 0) model.dump();
}
model
.
dump
();
const
auto
&
lower_bounds
=
mesh
.
getLowerBounds
();
const
auto
&
upper_bounds
=
mesh
.
getUpperBounds
();
Real
L
=
upper_bounds
(
0
)
-
lower_bounds
(
0
);
Real
H
=
upper_bounds
(
1
)
-
lower_bounds
(
1
);
const
auto
&
mat
=
model
.
getMaterial
(
0
);
const
auto
&
filter
=
mat
.
getElementFilter
();
Vector
<
Real
>
barycenter
(
spatial_dimension
);
for
(
auto
&
type
:
filter
.
elementTypes
(
spatial_dimension
))
{
UInt
nb_elem
=
mesh
.
getNbElement
(
type
);
const
UInt
nb_gp
=
model
.
getFEEngine
().
getNbIntegrationPoints
(
type
);
auto
&
material_damage_array
=
mat
.
getArray
<
Real
>
(
"damage"
,
type
);
UInt
cpt
=
0
;
for
(
UInt
nel
=
0
;
nel
<
nb_elem
;
++
nel
)
{
mesh
.
getBarycenter
({
type
,
nel
,
_not_ghost
},
barycenter
);
if
((
std
::
abs
(
barycenter
(
0
)
-
(
L
/
2
)
+
0.025
)
<
0.025
)
&&
(
std
::
abs
(
barycenter
(
1
)
-
(
H
/
2
)
+
0.025
)
<
0.025
))
{
if
(
material_damage_array
(
cpt
,
0
)
<
0.9
)
{
std
::
terminate
();
}
}
cpt
+=
nb_gp
;
}
}
return
0
;
}
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