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test_coupled_stiffness.cc
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rAKA akantu
test_coupled_stiffness.cc
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/**
* @file test_coupled_stiffness.cc
*
* @author Mohit Pundir <mohit.pundir@epfl.ch>
*
* @date creation: Fri May 24 2019
* @date last modification: Wed Oct 02 2019
*
* @brief Test for contact mechanics model class
*
*
* @section LICENSE
*
* Copyright (©) 2018-2021 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 "solid_mechanics_model.hh"
#include "contact_mechanics_model.hh"
#include "coupler_solid_contact.hh"
#include "non_linear_solver.hh"
#include "sparse_matrix.hh"
#include "surface_selector.hh"
/* -------------------------------------------------------------------------- */
using
namespace
akantu
;
/* -------------------------------------------------------------------------- */
int
main
(
int
argc
,
char
*
argv
[])
{
Real
max_displacement
=
0.01
;
const
UInt
spatial_dimension
=
2
;
initialize
(
"material_stiffness.dat"
,
argc
,
argv
);
Mesh
mesh
(
spatial_dimension
);
mesh
.
read
(
"flat_on_flat.msh"
);
CouplerSolidContact
coupler
(
mesh
);
auto
&
solid
=
coupler
.
getSolidMechanicsModel
();
auto
&
contact
=
coupler
.
getContactMechanicsModel
();
auto
&&
selector
=
std
::
make_shared
<
MeshDataMaterialSelector
<
std
::
string
>>
(
"physical_names"
,
solid
);
solid
.
setMaterialSelector
(
selector
);
solid
.
initFull
(
_analysis_method
=
_static
);
contact
.
initFull
(
_analysis_method
=
_implicit_contact
);
auto
&&
surface_selector
=
std
::
make_shared
<
PhysicalSurfaceSelector
>
(
mesh
);
contact
.
getContactDetector
().
setSurfaceSelector
(
surface_selector
);
solid
.
applyBC
(
BC
::
Dirichlet
::
FixedValue
(
0.0
,
_x
),
"bottom"
);
solid
.
applyBC
(
BC
::
Dirichlet
::
FixedValue
(
0.0
,
_y
),
"bottom"
);
solid
.
applyBC
(
BC
::
Dirichlet
::
IncrementValue
(
-
max_displacement
,
_y
),
"top"
);
coupler
.
initFull
(
_analysis_method
=
_implicit_contact
);
auto
&
solver
=
coupler
.
getNonLinearSolver
();
solver
.
set
(
"max_iterations"
,
1000
);
solver
.
set
(
"threshold"
,
1e-2
);
solver
.
set
(
"convergence_type"
,
SolveConvergenceCriteria
::
_residual
);
coupler
.
setBaseName
(
"test-coupled-stiffness"
);
coupler
.
addDumpFieldVector
(
"displacement"
);
coupler
.
addDumpFieldVector
(
"normals"
);
coupler
.
addDumpFieldVector
(
"contact_force"
);
coupler
.
addDumpFieldVector
(
"external_force"
);
coupler
.
addDumpFieldVector
(
"internal_force"
);
coupler
.
addDumpField
(
"gaps"
);
coupler
.
addDumpField
(
"blocked_dofs"
);
coupler
.
addDumpField
(
"grad_u"
);
coupler
.
addDumpField
(
"stress"
);
auto
&
before_assembly
=
const_cast
<
SparseMatrix
&>
(
coupler
.
getDOFManager
().
getNewMatrix
(
"K"
,
_symmetric
));
solid
.
assembleStiffnessMatrix
();
auto
&
solid_assembly
=
const_cast
<
SparseMatrix
&>
(
coupler
.
getDOFManager
().
getMatrix
(
"K"
));
solid_assembly
.
saveMatrix
(
"solid_assembly.mtx"
);
auto
&
displacement
=
solid
.
getDisplacement
();
contact
.
search
(
displacement
);
contact
.
assembleStiffnessMatrix
();
auto
contact_map
=
contact
.
getContactMap
();
auto
nb_contacts
=
contact_map
.
size
();
auto
&
contact_assembly
=
const_cast
<
SparseMatrix
&>
(
coupler
.
getDOFManager
().
getMatrix
(
"K"
));
contact_assembly
.
saveMatrix
(
"contact_assembly.mtx"
);
solid
.
assembleInternalForces
();
contact
.
assembleInternalForces
();
coupler
.
dump
();
Array
<
Real
>
&
contact_force
=
contact
.
getInternalForce
();
for
(
UInt
n
:
arange
(
contact_force
.
size
()))
{
std
::
cerr
<<
contact_force
(
n
,
1
)
<<
std
::
endl
;
}
if
(
solid_assembly
.
size
()
==
contact_assembly
.
size
()
and
nb_contacts
>
0
)
{
std
::
cerr
<<
"size of stiffness matrix of solid = "
<<
solid_assembly
.
size
()
<<
std
::
endl
;
std
::
cerr
<<
"size of stiffness matrix of coupled = "
<<
contact_assembly
.
size
()
<<
std
::
endl
;
std
::
cerr
<<
"number of contacts = "
<<
nb_contacts
<<
std
::
endl
;
for
(
auto
&
pair
:
contact_map
)
{
std
::
cerr
<<
"Node "
<<
pair
.
first
<<
" in contact with "
<<
pair
.
second
.
master
<<
" of gap "
<<
pair
.
second
.
gap
<<
std
::
endl
;
}
return
EXIT_FAILURE
;
}
return
EXIT_SUCCESS
;
}
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