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test_material_damage_iterative.cc
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rAKA akantu
test_material_damage_iterative.cc
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/**
* @file test_material_damage_iterative.cc
* @author Aurelia Isabel Cuba Ramos <aurelia.cubaramos@epfl.ch>
* @date Thu Nov 26 12:20:15 2015
*
* @brief test the material damage iterative
*
* @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 "material_damage_iterative.hh"
#include "solid_mechanics_model.hh"
/* -------------------------------------------------------------------------- */
using
namespace
akantu
;
/* -------------------------------------------------------------------------- */
/* Main */
/* -------------------------------------------------------------------------- */
int
main
(
int
argc
,
char
*
argv
[])
{
Math
::
setTolerance
(
1e-13
);
debug
::
setDebugLevel
(
dblWarning
);
initialize
(
"material.dat"
,
argc
,
argv
);
const
UInt
spatial_dimension
=
2
;
ElementType
element_type
=
_triangle_3
;
StaticCommunicator
&
comm
=
akantu
::
StaticCommunicator
::
getStaticCommunicator
();
Int
psize
=
comm
.
getNbProc
();
Int
prank
=
comm
.
whoAmI
();
/// read the mesh and partion it
Mesh
mesh
(
spatial_dimension
);
akantu
::
MeshPartition
*
partition
=
NULL
;
if
(
prank
==
0
)
{
mesh
.
read
(
"plate.msh"
);
/// partition the mesh
partition
=
new
MeshPartitionScotch
(
mesh
,
spatial_dimension
);
partition
->
partitionate
(
psize
);
}
/// model creation
SolidMechanicsModel
model
(
mesh
);
model
.
initParallel
(
partition
);
delete
partition
;
/// initialization of the model
model
.
initFull
(
SolidMechanicsModelOptions
(
_static
));
/// boundary conditions
/// Dirichlet BC
mesh
.
createGroupsFromMeshData
<
std
::
string
>
(
"physical_names"
);
// creates groups from mesh names
model
.
applyBC
(
BC
::
Dirichlet
::
FixedValue
(
0
,
_x
),
"left"
);
model
.
applyBC
(
BC
::
Dirichlet
::
FixedValue
(
0
,
_y
),
"bottom"
);
model
.
applyBC
(
BC
::
Dirichlet
::
FixedValue
(
2.
,
_y
),
"top"
);
/// add fields that should be dumped
model
.
setBaseName
(
"material_damage_iterative_test"
);
model
.
addDumpFieldVector
(
"displacement"
);;
model
.
addDumpField
(
"stress"
);
model
.
addDumpField
(
"blocked_dofs"
);
model
.
addDumpField
(
"residual"
);
model
.
addDumpField
(
"grad_u"
);
model
.
addDumpField
(
"damage"
);
model
.
addDumpField
(
"partitions"
);
model
.
addDumpField
(
"material_index"
);
model
.
addDumpField
(
"Sc"
);
model
.
addDumpField
(
"force"
);
model
.
addDumpField
(
"equivalent_stress"
);
model
.
dump
();
MaterialDamageIterative
<
spatial_dimension
>
&
material
=
dynamic_cast
<
MaterialDamageIterative
<
spatial_dimension
>
&
>
(
model
.
getMaterial
(
0
));
Real
error
;
bool
converged
=
false
;
UInt
nb_damaged_elements
=
0
;
Real
max_eq_stress
=
0
;
/// solve the system
converged
=
model
.
solveStep
<
_scm_newton_raphson_tangent_modified
,
_scc_increment
>
(
1e-4
,
error
,
2
);
if
(
converged
==
false
)
{
std
::
cout
<<
"The error is: "
<<
error
<<
std
::
endl
;
AKANTU_DEBUG_ASSERT
(
converged
,
"Did not converge"
);
}
model
.
dump
();
/// check that the normalized equivalent stress
Array
<
Real
>
&
eq_stress
=
material
.
getInternal
<
Real
>
(
"equivalent_stress"
)(
element_type
,
_not_ghost
);
Array
<
Real
>::
const_scalar_iterator
eq_stress_it
=
eq_stress
.
begin
();
UInt
nb_elements
=
mesh
.
getNbElement
(
element_type
,
_not_ghost
);
for
(
UInt
e
=
0
;
e
<
nb_elements
;
++
e
,
++
eq_stress_it
)
{
if
(
!
Math
::
are_float_equal
(
*
eq_stress_it
,
0.1
))
{
std
::
cout
<<
"Error in the equivalent normalized stress"
<<
std
::
endl
;
finalize
();
return
EXIT_FAILURE
;
}
}
/// get the maximum equivalent stress
max_eq_stress
=
material
.
getNormMaxEquivalentStress
();
nb_damaged_elements
=
0
;
if
(
max_eq_stress
>
1.
)
nb_damaged_elements
=
material
.
updateDamage
();
if
(
nb_damaged_elements
)
{
std
::
cout
<<
"Damage occured even though the normalized stress is below 1"
<<
std
::
endl
;
finalize
();
return
EXIT_FAILURE
;
}
/// weaken material locally to cause damage
Array
<
Real
>
&
strength
=
const_cast
<
Array
<
Real
>
&>
(
material
.
getInternal
<
Real
>
(
"Sc"
)(
element_type
,
_not_ghost
));
Array
<
Real
>::
scalar_iterator
strength_it
=
strength
.
begin
();
++
strength_it
;
*
strength_it
=
0.9
;
strength_it
+=
4
;
*
strength_it
=
0.898
;
/// solve the system again
converged
=
model
.
solveStep
<
_scm_newton_raphson_tangent_modified
,
_scc_increment
>
(
1e-4
,
error
,
2
);
if
(
converged
==
false
)
{
std
::
cout
<<
"The error is: "
<<
error
<<
std
::
endl
;
AKANTU_DEBUG_ASSERT
(
converged
,
"Did not converge"
);
}
/// get the maximum equivalent stress
max_eq_stress
=
material
.
getNormMaxEquivalentStress
();
nb_damaged_elements
=
0
;
if
(
max_eq_stress
>
1.
)
nb_damaged_elements
=
material
.
updateDamage
();
UInt
nb_damaged_elements_per_proc
=
2
;
if
(
nb_damaged_elements
!=
psize
*
nb_damaged_elements_per_proc
)
{
std
::
cout
<<
"Error in number of damaged elements"
<<
std
::
endl
;
finalize
();
return
EXIT_FAILURE
;
}
/// check that damage occured in correct elements
Real
dam_diff
=
0.
;
Array
<
Real
>
&
damage
=
material
.
getInternal
<
Real
>
(
"damage"
)(
element_type
,
_not_ghost
);
Array
<
Real
>::
const_scalar_iterator
damage_it
=
damage
.
begin
();
for
(
UInt
e
=
0
;
e
<
nb_elements
;
++
e
,
++
damage_it
)
{
if
(
e
==
1
||
e
==
5
)
dam_diff
+=
std
::
abs
(
0.1
-*
damage_it
);
else
dam_diff
+=
(
*
damage_it
);
}
if
(
dam_diff
>
1.e-13
)
{
std
::
cout
<<
"Error in damage pattern"
<<
std
::
endl
;
finalize
();
return
EXIT_FAILURE
;
}
/// solve to compute the stresses correctly for dumping
converged
=
model
.
solveStep
<
_scm_newton_raphson_tangent_modified
,
_scc_increment
>
(
1e-4
,
error
,
2
);
if
(
converged
==
false
)
{
std
::
cout
<<
"The error is: "
<<
error
<<
std
::
endl
;
AKANTU_DEBUG_ASSERT
(
converged
,
"Did not converge"
);
}
model
.
dump
();
finalize
();
return
EXIT_SUCCESS
;
}
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