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structural_element_kirchhoff_shell.hh
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rAKA akantu
structural_element_kirchhoff_shell.hh
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/**
* @file structural_element_bernoulli_kirchhoff_shell.hh
*
* @author Fabian Barras <fabian.barras@epfl.ch>
* @author Sébastien Hartmann <sebastien.hartmann@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
* @author Damien Spielmann <damien.spielmann@epfl.ch>
*
* @date creation Tue Sep 19 2017
*
* @brief Specific functions for bernoulli kirchhoff shell
*
* @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/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_STRUCTURAL_ELEMENT_BERNOULLI_KIRCHHOFF_SHELL_HH__
#define __AKANTU_STRUCTURAL_ELEMENT_BERNOULLI_KIRCHHOFF_SHELL_HH__
namespace
akantu
{
/* -------------------------------------------------------------------------- */
template
<>
inline
void
StructuralMechanicsModel
::
assembleMass
<
_discrete_kirchhoff_triangle_18
>
()
{
AKANTU_DEBUG_TO_IMPLEMENT
();
}
/* -------------------------------------------------------------------------- */
template
<>
void
StructuralMechanicsModel
::
computeRotationMatrix
<
_discrete_kirchhoff_triangle_18
>
(
Array
<
Real
>
&
rotations
)
{
ElementType
type
=
_discrete_kirchhoff_triangle_18
;
Mesh
&
mesh
=
getFEEngine
().
getMesh
();
UInt
nb_element
=
mesh
.
getNbElement
(
type
);
Array
<
UInt
>::
iterator
<
Vector
<
UInt
>
>
connec_it
=
mesh
.
getConnectivity
(
type
).
begin
(
3
);
Array
<
Real
>::
vector_iterator
nodes_it
=
mesh
.
getNodes
().
begin
(
spatial_dimension
);
Matrix
<
Real
>
Pe
(
spatial_dimension
,
spatial_dimension
);
Matrix
<
Real
>
Pg
(
spatial_dimension
,
spatial_dimension
);
Matrix
<
Real
>
inv_Pg
(
spatial_dimension
,
spatial_dimension
);
Array
<
Real
>::
matrix_iterator
R_it
=
rotations
.
begin
(
nb_degree_of_freedom
,
nb_degree_of_freedom
);
for
(
UInt
e
=
0
;
e
<
nb_element
;
++
e
,
++
connec_it
,
++
R_it
)
{
Pe
.
eye
();
Matrix
<
Real
>
&
R
=
*
R_it
;
Vector
<
UInt
>
&
connec
=
*
connec_it
;
Vector
<
Real
>
x2
;
x2
=
nodes_it
[
connec
(
1
)];
// X2
Vector
<
Real
>
x1
;
x1
=
nodes_it
[
connec
(
0
)];
// X1
Vector
<
Real
>
x3
;
x3
=
nodes_it
[
connec
(
2
)];
// X3
Vector
<
Real
>
Pg_col_1
=
x2
-
x1
;
Vector
<
Real
>
Pg_col_2
=
x3
-
x1
;
Vector
<
Real
>
Pg_col_3
(
spatial_dimension
);
Pg_col_3
.
crossProduct
(
Pg_col_1
,
Pg_col_2
);
for
(
UInt
i
=
0
;
i
<
spatial_dimension
;
++
i
)
{
Pg
(
i
,
0
)
=
Pg_col_1
(
i
);
Pg
(
i
,
1
)
=
Pg_col_2
(
i
);
Pg
(
i
,
2
)
=
Pg_col_3
(
i
);
}
inv_Pg
.
inverse
(
Pg
);
// Pe *= inv_Pg;
Pe
.
eye
();
for
(
UInt
i
=
0
;
i
<
spatial_dimension
;
++
i
)
{
for
(
UInt
j
=
0
;
j
<
spatial_dimension
;
++
j
)
{
R
(
i
,
j
)
=
Pe
(
i
,
j
);
R
(
i
+
spatial_dimension
,
j
+
spatial_dimension
)
=
Pe
(
i
,
j
);
}
}
}
}
}
// akantu
#endif
/* __AKANTU_STRUCTURAL_ELEMENT_BERNOULLI_DISCRETE_KIRCHHOFF_TRIANGLE_18_HH__ */
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