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can anybody make 2d shell tutorial?

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14 years 3 months ago #3893 by Bridge_PL
can anybody make 2d shell tutorial? was created by Bridge_PL
Hi again,

I look for 2d shell example/tutorial at this forum,
and youtube :) and I must to say
there is no working example/tutorial 2d shell
and a lot of people have the same problem,
We want solve simple 2d shell with few presurefilds on it.

I attached simple geometry file.

Attachment geometry_001.zip not found




how to:
- create faces
- groups of load
- groups of fixed edges
- create mesh
- create comm file
- solve
show:
- reactions,
- maximal displacements
- maximal SIXX
- maximal SIYY.

Can anybody make tutorial? swf? movie?
It will be most viewed tutorial on youtube :cheer:
How many times can you look at piston? :blink:

Thanks in advance.
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14 years 3 months ago #3896 by Claus
Replied by Claus on topic Re:can anybody make 2d shell tutorial?
The problem with doing a video tutorial of said case, is that most of the work would take place in Eficas, since the wizard in Salomé-MECA deals with 3D structures and the pressure load. A video is not suited to convey this.

Creating the geometry and mesh is very basic and contained in several video tutorials, so a written tutorial is a better way of describing the addition of using shells - I think Kees has a pretty decent one on the wiki.

Code_Aster release : STA11.4 on OpenSUSE 12.3 64 bits - EDF/Intel version
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14 years 3 months ago #3897 by Bridge_PL
Replied by Bridge_PL on topic Re:can anybody make 2d shell tutorial?
Hi Claus,

I tried Klaus tutorial several times with the same result "copy error". :(
This is the most known "copy error" exmple :woohoo:

I think one tutorial from the begining to the end is the best solution.
Beginners get lost in many options/tutorials.

Look at Results of What should be improved in CAELinux?

Documentation & Tutorials
590 43.3%

More graphical user interfaces & Wizards
277 20.3%

Maybe, you are right,
best solution will be video tutorial for geometry and mesh + PDF for Eficas.

This is easy example so making tutorial shudnt be difficoult.

Regards
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14 years 3 months ago #3898 by kwou
Replied by kwou on topic Re:can anybody make 2d shell tutorial?
Hoi Bridge

Apparently between the Code Aster versions 9.x and 10.x the syntax became stricter. Assuming you use Aster 10.x, the CREA_MAILLAGE command generates an error because no TRIA6 elements are available in mesh. So comment out this part and the calculation runs. Well, on my computer it does.
[code:1]
meshmod=CREA_MAILLAGE(MAILLAGE=meshinit,
MODI_MAILLE=(_F(TOUT='OUI',
OPTION='QUAD8_9',),),);
#_F(TOUT='OUI',
# OPTION='TRIA6_7',),),); #### doesnot work anymore in ASTER10.X
[/code:1]

And indeed, the error message is a bit strange, reporting QUAD8 elements not available in stead of TRIA6 elements.

Wiki has been updated: www.caelinux.org/wiki/index.php/Contrib:...outers/platedynamics . But maybe other shells example experience the same problem. So, if you experience any further problems with the examples, please report them here. We will try to help.

kind regards - kees<br /><br />Post edited by: Kees Wouters, at: 2010/02/26 15:12

Interest: structural mechanics, solar energy (picture at 'my location' shows too little pv panels)

--
kind regards - kees
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14 years 3 months ago #3914 by Bridge_PL
Replied by Bridge_PL on topic Re:can anybody make 2d shell tutorial?
Hi Kees :cheer:

can You modify your ASTK com file from Your example/tutorial to be usefull in this shell problem?

Groups of load:
presure_1=10
presure_2=20
presure_3=30
presure_4=40

fixed edges:
fixed_1 (0,0,0)
fixed_2 ( , ,0)

results:
- reactions,
- maximal displacements
- maximal SIXX
- maximal SIYY

I will try to make geometry and mesh.

Maybe it will work together,
and simple tutorial will be done...

Regards :side:
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14 years 3 months ago #3917 by kwou
Replied by kwou on topic Re:can anybody make 2d shell tutorial?
Hoi Bridge,

Maybe it is easier to start a new example in the wiki for shell. All my examples are just what I needed at that moment in time: I wrote them down as they were. Sometimes a bit chaotic, ie not always one nicely separated issue, I know.
So I can start a new one with just the basics: geometry, boundary conditions, loads, mechanical properties, static calculation and extraction of displacements and stresses. Or you can make you own wiki. I am glad to participate and give advice.
If you have geometry and comm files, we can just start. So please
indicate what you prefer and see what we can make out of it.

One question about your geometry: I guess to need an extra line between P6 and P8?

Have a nice weekend.
kind regards - kees<br /><br />Post edited by: Kees Wouters, at: 2010/03/05 11:54

Interest: structural mechanics, solar energy (picture at 'my location' shows too little pv panels)

--
kind regards - kees
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