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Code_Aster
®
Version
6.3
Titrate:
Modeling
3d_HM
,
3d_HHM
,
3d_THM
,
3d_THH
,
3d_THHM
Date:
04/11/02
Author (S):
C. CHAVANT
Key
:
U3.14.07-C1
Page:
1/6
Instruction manual
U3.14 booklet: Mechanical finite elements 3D
HT-66/02/003/A
Organization (S):
EDF-R & D/AMA















Instruction manual
U3.14 booklet: Mechanical finite elements 3D
U3.14.07 document



Modelings
3d_HM
,
3d_HHM,
3d_THM
,
3d_THH
,
3d_THHM



Summary:

This document describes for modelings
3d_HM
,
3d_HHM,
3d_THM
,
3d_THH
and
3d_THHM
:
·
degrees of freedom carried by the finite elements which support modeling,
·
the related meshs supports,
·
supported materials and loadings,
·
options of calculations for the elementary matrices and the post processing,
·
nonlinear possibilities as well as the options of the breaking process if they exist.

Modelings
3d_HM
,
3d_HHM
,
3d_THM
,
3d_THH
,
3d_THHM
, (Phenomenon:
MECHANICS
) correspond to
finite elements whose meshs supports are voluminal.
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Code_Aster
®
Version
6.3
Titrate:
Modeling
3d_HM
,
3d_HHM
,
3d_THM
,
3d_THH
,
3d_THHM
Date:
04/11/02
Author (S):
C. CHAVANT
Key
:
U3.14.07-C1
Page:
2/6
Instruction manual
U3.14 booklet: Mechanical finite elements 3D
HT-66/02/003/A
1 Discretization
1.1
Degrees of freedom
DX
,
DY
and
DZ
the degrees of freedom of displacement indicate.
PRE1
and
PRE2
two degrees of freedom of pressure indicate, whose precise significance depends on
laws of behavior used.
TEMP
indicate the temperature.
Finite element
Degrees of freedom
3d_HM
DX, DY, DZ, PRE1
3d_HHM
DX, DY, DZ, PRE1, PRE2
3d_THM
DX, DY, DZ, PRE1, TEMP
3d_THH
PRE1, PRE2, TEMP
3d_THHM
DX, DY, DZ, PRE1, PRE2, TEMP

1.2
Net support of the matrices of rigidity
The meshs support of the finite elements can be only hexahedrons. The elements are
isoparametric.
Modeling Nets
Interpolation
Remarks
3d_HM
HEXA20
Serendip 20 nodes in
trilinear displacement on 8
nodes in pressure
Pressure of a node medium
is the average of the nodes
nodes of the segment
3d_HHM
HEXA20
Serendip 20 nodes in
trilinear displacement on 8
nodes in pressure
Pressures of a node medium
are the averages of the nodes
nodes of the segment
3d_THM
HEXA20
Serendip 20 nodes in
trilinear displacement on 8
nodes in pressure and
temperature
Pressure and the temperature
of a node medium are
average of the nodes nodes
segment
3d_THH
HEXA20
Trilinear on 8 nodes in
pressure and temperature
Pressures and the temperature
of a node medium are
average of the nodes nodes
segment
3d_THHM
HEXA20
Serendip 20 nodes in
trilinear displacement on 8
nodes in pressure and
temperature
Pressures and the temperature
of a node medium are
average of the nodes nodes
segment
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Code_Aster
®
Version
6.3
Titrate:
Modeling
3d_HM
,
3d_HHM
,
3d_THM
,
3d_THH
,
3d_THHM
Date:
04/11/02
Author (S):
C. CHAVANT
Key
:
U3.14.07-C1
Page:
3/6
Instruction manual
U3.14 booklet: Mechanical finite elements 3D
HT-66/02/003/A
1.3
Net support of the loadings
Modeling Nets
Interpolation
Remarks
3d_HM
QUAD8
Serendip 8 nodes in
bilinear displacement on 4
nodes in pressure and
temperature
Pressure of a node medium
is the average of the nodes
nodes of the segment
3d_HHM
QUAD8
Serendip 8 nodes in
bilinear displacement on 4
nodes in pressure
Pressures of a node medium
are the averages of the nodes
nodes of the segment
3d_THM
QUAD8
Quadratic in displacement
linear in pressure and
temperature
Pressure and the temperature
of a node medium are
average of the nodes nodes
segment
3d_THH
QUAD8
Bilinear on 4 nodes in
pressure and temperature
Pressures and the temperature
of a node medium are
average of the nodes nodes
segment
3d_THHM
QUAD8
Serendip 8 nodes in
bilinear displacement on 4
nodes in pressure and
temperature
Pressures and the temperature
of a node medium are
average of the nodes nodes
segment

2
Significance of the symbols
·
corresponds to a functionality available
corresponds to a functionality which could exist but noncurrently available
Name of case
test
corresponds to a test implementing the functionality

3 Materials
supported
DEFI_MATERIAU
3d_HM
3d_HHM
3d_THM
3d_THH
3d_THHM
THM_LIQU
SSNV134C WTNV112B WTNV109A
·
·
THM_GAZ
SSNV134C WTNV122B WTNV109A
·
·
THM_VAPE_GAZ
WTNV112B
·
·
THM_INIT
SSNV134C WTNV112B WTNV109A
·
·
THM_DIFFU
SSNV134C WTNV112B WTNV109A
·
·
ELAS
SSNV134C WTNV112B WTNV109A
·
CJS
SSNV134C ·
·
·
ELAS_THM
WTNV115A
·
SURF_ETAT_SATU
WTNV116A
CAM_CLAY_THM
WTNV117A
SURF_ETAT_NSAT
·
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Code_Aster
®
Version
6.3
Titrate:
Modeling
3d_HM
,
3d_HHM
,
3d_THM
,
3d_THH
,
3d_THHM
Date:
04/11/02
Author (S):
C. CHAVANT
Key
:
U3.14.07-C1
Page:
4/6
Instruction manual
U3.14 booklet: Mechanical finite elements 3D
HT-66/02/003/A
4 Loadings
supported
4.1
AFFE_CHAR_MECA
All elements
of this note
Remarks
DDL_IMPO
SSNV134C
FACE_IMPO
SSNV134C
LIAISON_DDL
·
LIAISON_OBLIQUE
·
LIAISON_GROUP
·
LIAISON_UNIF
·
LIAISON_SOLIDE
·
LIAISON_ELEM
·
LIAISON_CHAM_NO
·
GRAVITY
·
ROTATION
FORCE_NODALE
·
FORCE_FACE
FORCE_ARETE
FORCE_INTERN
·
PRES_REP
SSNV134C
EPSI_INIT
FLUX_THM_REP
WTNV114C
PRES_CALCULEE
·
EPSA_CALCULEE
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Code_Aster
®
Version
6.3
Titrate:
Modeling
3d_HM
,
3d_HHM
,
3d_THM
,
3d_THH
,
3d_THHM
Date:
04/11/02
Author (S):
C. CHAVANT
Key
:
U3.14.07-C1
Page:
5/6
Instruction manual
U3.14 booklet: Mechanical finite elements 3D
HT-66/02/003/A
4.2
AFFE_CHAR_MECA_F
All elements
of this note
Remarks
DDL_IMPO
·
FACE_IMPO
·
LIAISON_DDL
·
LIAISON_OBLIQUE
·
LIAISON_GROUP
·
LIAISON_UNIF
·
LIAISON_SOLIDE
·
FORCE_NODALE
·
FORCE_FACE
·
FORCE_ARETE
FORCE_INTERN
·
PRES_REP
·
EPSI_INIT
FLUX_THM_REP
·

5 Possibilities
non-linear
5.1
STAT_NON_LINE
COMP_INCR
RELATION
3d_HM
3d_HHM
3d_THM
3d_THH
3d_THHM
KIT_HM
SSNV13
4C
KIT_HHM
WTNV112B
KIT_THM
WTNV109A
KIT_THH
·
KIT_THHM
·

6
Elementary calculations of matrices
OPTIONS Remarks
“RIGI_MECA_TANG”
·
“FULL_MECA”
·
“RAPH_MECA”
·
“FORC_NODA”
· If
FORC_NODA
is called from
REAC_NODA
only the terms of mechanics are
calculated
background image
Code_Aster
®
Version
6.3
Titrate:
Modeling
3d_HM
,
3d_HHM
,
3d_THM
,
3d_THH
,
3d_THHM
Date:
04/11/02
Author (S):
C. CHAVANT
Key
:
U3.14.07-C1
Page:
6/6
Instruction manual
U3.14 booklet: Mechanical finite elements 3D
HT-66/02/003/A
7
Postprocessing of calculation
7.1 Options
CALC_ELEM
OPTIONS
All elements
of this note
Remarks
“SIEF_ELNO_ELGA”
SSNV134C
“VARI_ELNO_ELGA”
·
“EPSI_ELNO_DEPL”
“EPSI_ELGA_DEPL”

7.2 Options
CALC_NO
All elements
of this note
Remarks
“FORC_NODA”
· If
FORC_NODA
is called from
REAC_NODA
only the terms of mechanics are
calculated
“REAC_NODA”
·
Only the terms of mechanics are
calculated