Comment faire un analyse simple de fatigue sur tuyau?

Perceval Zhou · 2021-08-11 10:57:01

Monsieurs,
J'ai rencontré un problème lors d'un étude dans lequel je voudrais réaliser un analyse de fatigue de type de Wohler en utilisant CALC_FATIGUE, et je me réfère sur l'exemple szlz105a pour l'édition du fichier .comm, mais il appaît toujous des erreurs dans les executions.
J'ai créé le maillage de la structure de tuyau comme un arête avec deux coudes( en fait c'est le maillage de l'exemple sdlx02d), et j'utilise la modélisation de TUYAU_6M, et les autres commandes sont tous similaires aux celles de szlz105a.
Voici mon fichier .comm et .med, j'utilise Salome-Meca2018 de version Windows.

Attachments:
ssll101d_mesh1.med, Size: 21.4 KiB, Downloads: 130

Perceval Zhou · 2021-08-11 10:58:41

Merci de m'en débarrasser!

Attachments:
szlz105a_2.comm, Size: 3.75 KiB, Downloads: 149

Perceval Zhou · 2021-08-15 09:05:03

Y a quelqu'un peut m'aider?

miib · 2021-08-15 15:38:48

Perceval Zhou wrote:

Comment faire un analyse simple de fatigue sur tuyau?

1) draw a cylinder

2) define 3 geometrical groups : " fix "= a base of cylinder ; "load" = the other base : "c" = the volume.

3) generate mesh and groups of mesh from geometry.

4) open aster module

5) add a new stage

6) select, copy ( CTRL+C) and paste ( CTRL+V) this code in the stage :

DEBUT(LANG='EN')

tstep = 0.5

mesh = LIRE_MAILLAGE(identifier='1:1',
FORMAT='MED',
UNITE=20)

model = AFFE_MODELE(identifier='2:1',
AFFE=_F(MODELISATION=('3D', ),
PHENOMENE='MECANIQUE',
TOUT='OUI'),
MAILLAGE=mesh)

ys = DEFI_CONSTANTE(identifier='3:1',
VALE=210000000000.0)

ps = DEFI_CONSTANTE(identifier='4:1',
VALE=0.3)

ds = DEFI_CONSTANTE(identifier='5:1',
VALE=8000.0)

wholer = DEFI_FONCTION(identifier='6:1',
INTERPOL=('LIN', 'LOG'),
NOM_PARA='SIGM',
PROL_DROITE='LINEAIRE',
PROL_GAUCHE='CONSTANT',
VALE=(86200000.0, 1000000.0, 114000000.0, 200000.0, 138000000.0, 100000.0, 214000000.0, 20000.0, 262000000.0, 10000.0, 441000000.0, 2000.0, 1070000000.0, 200.0, 1410000000.0, 100.0, 1900000000.0, 50.0, 2830000000.0, 20.0, 4000000000.0, 10.0))

steel = DEFI_MATERIAU(identifier='7:1',
ECRO_LINE=_F(D_SIGM_EPSI=1100000000.0,
SY=700000000.0),
ELAS_FO=_F(E=ys,
NU=ps,
RHO=ds),
FATIGUE=_F(WOHLER=wholer),
RCCM=_F(SU=900000000.0))

fieldmat = AFFE_MATERIAU(identifier='8:1',
AFFE=_F(MATER=(steel, ),
TOUT='OUI'),
MODELE=model)

loadf = DEFI_FONCTION(identifier='9:1',
NOM_PARA='INST',
PROL_DROITE='CONSTANT',
PROL_GAUCHE='EXCLU',
VALE=(1.0, 70000000.0, 2.0, -70000000.0, 3.0, 70000000.0, 4.0, -70000000.0, 5.0, 70000000.0, 6.0, -70000000.0, 7.0, 70000000.0, 8.0, -70000000.0, 9.0, 70000000.0, 10.0, -70000000.0))

listr = DEFI_LIST_REEL(identifier='10:1',
DEBUT=1.0,
INTERVALLE=_F(JUSQU_A=10.0,
PAS=tstep))

times = DEFI_LIST_INST(identifier='11:1',
DEFI_LIST=_F(LIST_INST=listr),
METHODE='AUTO')

load = AFFE_CHAR_MECA(identifier='12:1',
FACE_IMPO=_F(DX=0.0,
DY=0.0,
DZ=0.0,
GROUP_MA=('fix', )),
MODELE=model)

loadd = AFFE_CHAR_MECA_F(identifier='13:1',
FORCE_FACE=_F(FY=loadf,
GROUP_MA=('load', )),
MODELE=model)

resnonl = DYNA_NON_LINE(identifier='14:1',
CHAM_MATER=fieldmat,
COMPORTEMENT=_F(DEFORMATION='SIMO_MIEHE',
RELATION='VMIS_ISOT_LINE'),
CONVERGENCE=_F(ITER_GLOB_MAXI=50),
EXCIT=(_F(CHARGE=load),
_F(CHARGE=loadd)),
INCREMENT=_F(LIST_INST=times),
MODELE=model,
NEWTON=_F(MATRICE='TANGENTE',
PREDICTION='TANGENTE'),
SCHEMA_TEMPS=_F(FORMULATION='DEPLACEMENT',
SCHEMA='HHT'),
SOLVEUR=_F(METHODE='MUMPS'))

resnonl = CALC_CHAMP(identifier='15:1',
reuse=resnonl,
CRITERES=('SIEQ_ELGA', ),
RESULTAT=resnonl)

fati = CALC_FATIGUE(identifier='16:1',
DOMMAGE='WOHLER',
HISTOIRE=_F(EQUI_GD='VMIS_SG',
RESULTAT=resnonl),
MATER=steel,
OPTION='DOMA_ELGA_SIGM',
TYPE_CALCUL='CUMUL_DOMMAGE')

IMPR_RESU(identifier='17:1',
FORMAT='MED',
RESU=(_F(RESULTAT=resnonl),
_F(CHAM_GD=fati,
NOM_CHAM_MED=('DOMA', ),
NOM_CMP=('DOMA', ))),
UNITE=2)

FIN()

7) in the tree pasted delete deprecated

8) reassigning the mesh

9) reassigning the directory of output results.

10 ) run.

miib · 2021-08-16 08:27:27

miib wrote:

1) draw a cylinder

the procedure is the same drawing a tube (or a plate with hole)

Attachments:
domage.jpg, Size: 122.04 KiB, Downloads: 128

miib · 2021-08-16 09:34:42

the procedure is the same if you use STAT_NON_LINE

Perceval Zhou · 2021-08-17 04:58:49

miib,
thank you for your explication, but this command file still won't work with my pipe model, maybe I should learn more from files of non-linear analysis..

miib · 2021-08-17 05:35:08

Perceval Zhou wrote:

miib,
thank you for your explication, but this command file still won't work with my pipe model, maybe I should learn more from files of non-linear analysis..

can you show the message error of the tipe like attached file ??? :-)

miib · 2021-08-17 05:36:09

attachment

Attachments:
message, Size: 41.99 KiB, Downloads: 138

Perceval Zhou · 2021-08-17 08:34:37

miib wrote:

Perceval Zhou wrote:
miib,
thank you for your explication, but this command file still won't work with my pipe model, maybe I should learn more from files of non-linear analysis..
can you show the message error of the tipe like attached file ??? :-)

Yes, it shows that the modelisation is not compatible with the choice "SIMO_MIEHE"

Attachments:
message, Size: 44.76 KiB, Downloads: 136

miib · 2021-08-17 09:31:12

miib wrote:

1) draw a cylinder
2) define 3 geometrical groups : " fix "= a base of cylinder ; "load" = the other base : "c" = the volume.
3) generate mesh and groups of mesh from geometry.

miib wrote:

the procedure is the same drawing a tube (or a plate with hole)

miib wrote:

mesh = LIRE_MAILLAGE(identifier='1:1',
FORMAT='MED',
UNITE=20)
model = AFFE_MODELE(identifier='2:1',
AFFE=_F(MODELISATION=('3D', ),
PHENOMENE='MECANIQUE',
TOUT='OUI'),
MAILLAGE=mesh)

p.s. naturally you must adapt your loads to your case study

miib · 2021-08-17 11:26:18

attached here an example of capability

Attachments:
post_process_screen_shot.zip, Size: 250.9 KiB, Downloads: 151

#1 2021-08-11 10:57:01

Comment faire un analyse simple de fatigue sur tuyau?

#2 2021-08-11 10:58:41

Re: Comment faire un analyse simple de fatigue sur tuyau?

#3 2021-08-15 09:05:03

Re: Comment faire un analyse simple de fatigue sur tuyau?

#4 2021-08-15 15:38:48

Re: Comment faire un analyse simple de fatigue sur tuyau?

#5 2021-08-16 08:27:27

Re: Comment faire un analyse simple de fatigue sur tuyau?

#6 2021-08-16 09:34:42

Re: Comment faire un analyse simple de fatigue sur tuyau?

#7 2021-08-17 04:58:49

Re: Comment faire un analyse simple de fatigue sur tuyau?

#8 2021-08-17 05:35:08

Re: Comment faire un analyse simple de fatigue sur tuyau?

#9 2021-08-17 05:36:09

Re: Comment faire un analyse simple de fatigue sur tuyau?

#10 2021-08-17 08:34:37

Re: Comment faire un analyse simple de fatigue sur tuyau?

#11 2021-08-17 09:31:12

Re: Comment faire un analyse simple de fatigue sur tuyau?

#12 2021-08-17 11:26:18

Re: Comment faire un analyse simple de fatigue sur tuyau?

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