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#1 Re: Code_Aster usage » [Solved]Advice needed on <EXCEPTION> <FACTOR_78> (DYNA_NON_LINE) » 2020-06-18 10:40:35

There are doubled nodes and elements in your mesh. Try merge nodes and merge elements.

mecour

#2 Re: Code_Aster usage » Mathematical background of GROT_GDEP when using POU_D_T_GD » 2020-06-08 11:25:36

Hello,

in document R5.03.40 you can find whole math of this element type.

#3 Re: Code_Aster usage » applying field to model from external file » 2020-04-08 14:08:46

Hello,

you are faster in asking question than in reading of documentation :-D

as in previous post you can use the CREA_CHAMP (OPERATION=EXTR, TABLE=tbl), before it you need to read your table with LIRE_TABLE ...

#4 Re: Code_Aster usage » [solved] calculating user defined field » 2020-04-08 11:54:35

Hello,

in this part of code-aster I am a little confused. But in this case I think TYPE_CHAM=NOEU_TEMP_R and NOM_CHAM=TEMP.

Or look at U4.72.04 section 3.9.1 where in note is information that you can find name of your fild in mess file.

#5 Re: Code_Aster usage » [solved] how to apply load in curved section normal to each element » 2020-04-07 16:07:47

I think that it shoud works well, but maybe try it on some simple structure where you are able to verify the results.

#6 Re: Code_Aster usage » [solved] calculating user defined field » 2020-04-06 13:34:56

Hello,

CHALC_CHAMP  section 2.10 in U4.81.04

mecour

#7 Re: Code_Aster usage » [solved] how to apply load in curved section normal to each element » 2020-04-06 13:32:55

Hello,

Now I don't know how to do it with FORCE_FACE but with nodal forces I think you can define X,Y coordinate dependent load with FORMULA concept and AFFE_CHAR_MECA_F where you can use this fonction.

mecour

#8 Re: Code_Aster usage » Help with curved Beam » 2020-04-03 17:15:37

You can't assing nodes to modelisation POU_D_T,  you have to create element group.

If you are very new in code_aster I recommend you book of Jean Pierre Aubry, there is very good part with beams.


framabook.org/docs/Code_Aster/beginning_with_code_aster-jp_aubry-20190129.pdf

#9 Re: Code_Aster usage » Help with curved Beam » 2020-04-03 16:40:11

Hello,

you can create helix with curve construction, look at this video

youtube.com/watch?v=Akppa6PwDdY

after you create 1D helix curve you can just create grid of elements in smesh module. For example create mesh with Wire discretization algoritm and Number of segment hypothesis and here you can divide your curve to as many elements as you want.

#10 Re: Salome-Meca usage » aster.exe stopped working error » 2020-04-01 10:03:40

Hello,

I think there is some problem with your rmed file. Maybe you badly write the IMPR_RESU. But without comm file it is hard to say somethink.



mecour

#11 Re: Code_Aster usage » Need Help with 3d Beam and friction analysis » 2020-03-31 19:53:50

Hello,

The curved beam element is not supported in code-aster but you can create the curved structure with using of fine grid of straight element.

#12 Re: Code_Aster usage » Need Help with 3d Beam and friction analysis » 2020-03-30 18:13:02

Hello,

try to look at test case SSNV505. There are examples of contact with beam elements.

mecour

#13 Re: Code_Aster usage » Some words in manual PDFs are confusing. Please help understand. Thank » 2020-03-30 07:19:03

Hello,

this word arises from non-perfect machine translation from french to english. Try to compare original french with english version. I think that good explanation of value in every keyword is at the beggining of the the document in SYNTAX part. Here for example on page 4.
FONC_MULT = F [fonction]  - which means that you have to fill this with some fonction (DEFI_FONCTION concept)
COEF_MULT = [R] - some real number
FONC_MULT_c = aci [fonction_c] - which means that you have to fill this with some fonction but foncion of complex variable


mecour

#14 Re: Code_Aster usage » floating pont error with DKT + BETON_DOUBLE_DP » 2020-03-27 11:01:09

Hello,

for 1D and 2D element you can use nonlinear behaviours due to methode D'BORST. Behaviour BETON_DOUBLE_DP has not implemented this method. You can use for example ENDO_ISOT_BETON, ENDO_ORTO_BETON, MAZARS..... All usable method with the borst are specified by word BORST at supported local modelings in u4.51.11.

mecour

#15 Re: Code_Aster usage » Error using IMPR_FONCTION and 'XMGRACE' » 2020-03-25 18:01:12

Hello,

xmgrace is not part of windows version of salome-meca neither code-aster.

mecour

#16 Re: Code_Aster usage » State of Mortar Contact method in Code Aster » 2020-03-24 08:58:34

Hello,

I'm really not specialist in contact methods but what I know the CONTINUE - LAC method belongs to mortar methods.

mecour

#17 Re: Code_Aster usage » How can i add rotation DOFs in 3D modelization? » 2020-03-05 21:04:17

Hello,


attachment you can look at example of beam with simple support (free rotation around Y) created with DIS_TR elements. With discrete element you just define the stiffness in node, so very small stiffnes for free support and very big stiffnes for not moving support.

#18 Re: Code_Aster usage » How can i add rotation DOFs in 3D modelization? » 2020-03-05 19:23:33

Hello,

in 3D it is necessary to use discrete elements.

#20 Re: Code_Aster usage » [SOLVED]Under which format is preferable to import? » 2020-02-25 18:36:55

Hello,

the STEP format works well. It is usable with many other softwares.

mecour

#22 Re: Code_Aster usage » [SOLVED] A module for automated code checking. » 2020-02-06 21:17:05

Hello,

I think that there is no existing supplier of such solution for any open source software. Softwares with structural assesment acording to standards are strongly commercial and closed. In our country it is for example Scia Engineer or Dlubal.

I often use Code-aster for structural computing and the assesment I have to do with my own python templates and handmade computing.

mecour

#23 Re: Code_Aster usage » How do I assemble three meshes together into one? » 2020-02-04 09:15:23

hello,

you have many option how to work with that. You can use ASSE_MAILLAGE more times. You can create compound or partition of that three parts and create groups on mesh and than assign to every group different material.

These are quite beginers problems. I recomend you book from Jean Pierre Aubry,
framabook.org/docs/Code_Aster/beginning_with_code_aster-jp_aubry-20190129.pdf

#24 Re: Code_Aster usage » Save last successful result » 2020-01-29 14:26:48

Hello,

try work with CRIT_STAB, OBSERVATION or SUIVI_DDL  keywords in STAT_NON_LINE, you can observate every step of your calculation.

mecour

#25 Re: Code_Aster usage » PROPA_FISS results » 2020-01-28 07:55:25

Hello,

For such crack propagation simulation you need use python loop. Try to follow the SSLP321 test case or another one with crack propagation. There is usually necessary to use mesh refinement and also REPE_OUT (for example test case sslv319) folder for saving results in every step.

mecour