Code_Aster ®
Version
8.2
Titrate:
Operator POST_CHAM_XFEM


Date:
02/03/06
Author (S):
S. GENIAUT, C. REZETTE Key
:
U4.82.22-A1 Page:
1/6

Organization (S): EDF-R & D/AMA, DeltaCAD

Handbook of Utilization
U4.8- booklet: Postprocessing and dedicated analyzes
Document: U4.82.22

Operator POST_CHAM_XFEM

1 Goal
To create a SD Résultat containing the fields post-to treat method X-FEM.

It makes it possible to generate the fields displacements in order to post-treat them on the fissured grid.

Product a concept of the resultat_sdaster type.

The command POST_MAIL_XFEM [U4.82.21] which makes it possible to generate the fissured grid is
essential before the use of POST_CHAM_XFEM.
Handbook of Utilization
U4.8- booklet: Dedicated Post-traiement and analyzes
HT-62/06/004/A

Code_Aster ®
Version
8.2
Titrate:
Operator POST_CHAM_XFEM


Date:
02/03/06
Author (S):
S. GENIAUT, C. REZETTE Key
:
U4.82.22-A1 Page:
2/6

2
Contents

1 Goal ......................................................................................................................................................... 1
2 Contents ................................................................................................................................ 2
3 Syntax .................................................................................................................................................. 3
4 Operands ............................................................................................................................................. 3
5 Examples of use ............................................................................................................................ 4
5.1 Bar fissured with X-FEM (treated by test SSNV173A) ............................................................ 4
5.1.1 Extract of the command file ............................................................................................ 4
5.1.2 Visualization of the field displacement obtained by POST_CHAM_XFEM ................................... 5
Handbook of Utilization
U4.8- booklet: Dedicated Post-traiement and analyzes
HT-62/06/004/A

Code_Aster ®
Version
8.2
Titrate:
Operator POST_CHAM_XFEM


Date:
02/03/06
Author (S):
S. GENIAUT, C. REZETTE Key
:
U4.82.22-A1 Page:
3/6

3 Syntax

resu2 [resultat_sdaster] = POST_CHAM_XFEM (

MAILLAGE = my,
[maillage_sdaster]
MODELE = Mo, [modele_sdaster]

RESULTAT
=
resu,
[resultat_sdaster]
NOM_CHAM =

“DEPL”





[TXM]
)

4 Operands

MODELE

Name of model X-FEM generated by command MODI_MODELE_XFEM.

MAILLAGE

Name of grid X-FEM generated by command POST_MAIL_XFEM [U4.82.21].

RESULTAT

Name of the concept result resulting beforehand from a STAT_NON_LINE.

NOM_CHAM

Name of the field post-to be treated.
For the moment, only the field displacement (“DEPL”) can be post-treaty.

Handbook of Utilization
U4.8- booklet: Dedicated Post-traiement and analyzes
HT-62/06/004/A

Code_Aster ®
Version
8.2
Titrate:
Operator POST_CHAM_XFEM


Date:
02/03/06
Author (S):
S. GENIAUT, C. REZETTE Key
:
U4.82.22-A1 Page:
4/6

5 Examples
of use

5.1
Bar fissured with X-FEM (treated by test SSNV173A)

5.1.1 Extract of the command file

DEBUT ();



# Definition of model X-FEM
MODELEIN=AFFE_MODELE (MAILLAGE=MAILLAG2,


AFFE=_F (GROUP_MA= (“FLIGHT”,),
PHENOMENE=' MECANIQUE',


MODELISATION=' 3d_XFEM',

),
);

# Definition of the fissure (planes)
LN=FORMULE (NOM_PARA= (“X”, “Y”, “Z”), VALE=' Z-12.5 ');
LT=FORMULE (NOM_PARA= (“X”, “Y”, “Z”), VALE=' X-10. ');

FISS=DEFI_FISS_XFEM (MODELE=MODELEIN,
DEFI_FISS=_F (
FONC_LT=LT,
FONC_LN=LN,
),
GROUP_MA_ENRI=' VOL',
ORIE_FOND=_F (PFON_INI= (2.5, 0. , 12.5),
VECT_ORIE= (0. , 0. , 1. ),
PT_ORIGIN= (- 0.5, 0., 1.5),),

CONTACT=_F (...)
);

# Taken into account of the fissure in model X-FEM
MODELEK=MODI_MODELE_XFEM (MODELE_IN=MODELEIN,
FISSURE=FISS,
INFO=2,
);

# Conception of the grid fissures
MA_XFEM=POST_MAIL_XFEM (MODELE=MODELEK)

# Definitions of the loadings and conditions limiting and material, then assignments


# Resolution
UTOT=STAT_NON_LINE (MODELE=MODELEK,…)

# Conception of the SD result containing the field of displacement to the nodes of the grid fissures
DEPL=POST_CHAM_XFEM (MAILLAGE=MA_XFEM,
MODELE=MODELEK,
NOM_CHAM=' DEPL',
RESULTAT=UTOT)

FIN ();

Handbook of Utilization
U4.8- booklet: Dedicated Post-traiement and analyzes
HT-62/06/004/A

Code_Aster ®
Version
8.2
Titrate:
Operator POST_CHAM_XFEM


Date:
02/03/06
Author (S):
S. GENIAUT, C. REZETTE Key
:
U4.82.22-A1 Page:
5/6

5.1.2 Visualization of the field displacement obtained by POST_CHAM_XFEM



Handbook of Utilization
U4.8- booklet: Dedicated Post-traiement and analyzes
HT-62/06/004/A

Code_Aster ®
Version
8.2
Titrate:
Operator POST_CHAM_XFEM


Date:
02/03/06
Author (S):
S. GENIAUT, C. REZETTE Key
:
U4.82.22-A1 Page:
6/6

Intentionally white left page.
Handbook of Utilization
U4.8- booklet: Dedicated Post-traiement and analyzes
HT-62/06/004/A

Outline document