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von frans
Fr 26. Apr 2013, 14:58
Forum: Preprocessing
Thema: best practice for modeling plate.
Antworten: 26
Zugriffe: 20502

Re: best practice for modeling plate.

Hello Tim,

I uploaded the wrong results,
results should be around 0.619mm
fem results are 0.539mm, 0.567mm, 0.568mm as shown in the pictures
i'm very happy with these results, and i posted the wrong results in my enthousiasm...

regards Frans
von frans
Do 25. Apr 2013, 12:01
Forum: Bugs?!
Thema: Importing of nastran *.bdf file
Antworten: 1
Zugriffe: 2034

Importing of nastran *.bdf file

Hello Aurora team

I have 1 very small bug.
when selecting a nastran file the file extension filter not switchable from *.nas to *.bdf.
i work around by changing *.bdf to *.nas in the windows explorer.

so not a big thing, but something for a new version..

regards,
Frans
von frans
Do 25. Apr 2013, 10:23
Forum: Preprocessing
Thema: best practice for modeling plate.
Antworten: 26
Zugriffe: 20502

Re: best practice for modeling plate.

more results.
results looks good enough for my big models.
von frans
Di 23. Apr 2013, 11:51
Forum: Preprocessing
Thema: best practice for modeling plate.
Antworten: 26
Zugriffe: 20502

Re: best practice for modeling plate.

Hello aurora team, what is the exact status of the shell elements? i found a easy way to mesh shell elements using gmesh. based on this methode. http://www.youtube.com/watch?v=zDIUZluXTko here a picture of my fiddeling around. not checked any results yet, i'm just so happy i got it imported in auror...
von frans
Mo 22. Apr 2013, 18:32
Forum: Preprocessing
Thema: best practice for modeling plate.
Antworten: 26
Zugriffe: 20502

Re: best practice for modeling plate.

Hello Stefan

I would like to make e24 elements from easy *.step files.
just to make a metal box, tube, plate frame and other simple forms with e24 elements.

maybe somebody has a suggestion?

regards Frans
von frans
Mo 22. Apr 2013, 13:01
Forum: Preprocessing
Thema: best practice for modeling plate.
Antworten: 26
Zugriffe: 20502

Re: best practice for modeling plate.

hello, I got the meshed beam and instructions from selopez and played a little bit with it. i changed the plate thickness and it gave results which are similair as the results lopez published. also i tried an other load case, beam fixed to one side and a force of 800N on the other end and the result...
von frans
Sa 20. Apr 2013, 22:25
Forum: Preprocessing
Thema: best practice for modeling plate.
Antworten: 26
Zugriffe: 20502

Re: best practice for modeling plate.

Hello Selopez, You have done some really good work! With a minimum of elements the results are good enough in my field of work. especially if the models gets bigger its a real advantage. Does the accarancy increase when you try it with more clearer "plate" type of problem", for exampe a thin walled ...
von frans
Fr 19. Apr 2013, 13:58
Forum: Preprocessing
Thema: best practice for modeling plate.
Antworten: 26
Zugriffe: 20502

Re: best practice for modeling plate.

Hello Stefan, You understand correctly what i try to simulate. But i want to simulate it with plate/shell elements. The results with the fine mesh are good enough but they need an enormes amount of tetraeder elements. So I try to mesh more intelligent with plate/shell elements because they better re...
von frans
Fr 19. Apr 2013, 10:22
Forum: Preprocessing
Thema: best practice for modeling plate.
Antworten: 26
Zugriffe: 20502

Re: best practice for modeling plate.

here some more results.
I'm really puzzled..
can somebody of the aurora team give a reply?
von frans
Do 18. Apr 2013, 15:59
Forum: Preprocessing
Thema: best practice for modeling plate.
Antworten: 26
Zugriffe: 20502

Re: best practice for modeling plate.

here some results.
a calculated a deflection of 6,5mm approx.
von frans
Do 18. Apr 2013, 08:09
Forum: Bugs?!
Thema: u-boat example not working
Antworten: 2
Zugriffe: 1417

Re: u-boat example not working

Hello Michael,

I simple missed reading the options all the way down in the dialog box.
It's working now.
thanks,

regards,
Frans
von frans
Mi 17. Apr 2013, 20:29
Forum: Preprocessing
Thema: best practice for modeling plate.
Antworten: 26
Zugriffe: 20502

Re: best practice for modeling plate.

Hello TAH1712, The problem is a square steal beam 1000x100x25mm supported on both ends and a force of 800N pushing on it in the middle bending it "easy way". support 1 constraint on the edge in xyz, support 2 constraint on xy so it can move sideways(rolling support). force is in the center as a basi...
von frans
Mi 17. Apr 2013, 15:04
Forum: Bugs?!
Thema: u-boat example not working
Antworten: 2
Zugriffe: 1417

u-boat example not working

Hello Aurora team, I'm using version v2a and i tried the u-boat example in the manual but it's not importing the u-boot.nas with error message "error in file! identifier "tetra" not found". i tried to upload the file u-boat.nas file without succes. Can i send the u-boat.nas file to somebody? regards...
von frans
Mi 17. Apr 2013, 14:52
Forum: Preprocessing
Thema: best practice for modeling plate.
Antworten: 26
Zugriffe: 20502

Re: best practice for modeling plate.

hello TAH1712, thank you for your respons. Really it's not to peachy, don't worry. I'm also very happy with the z88 auroro program and the nice help at the forum :D You wrote down exactly my experience with tetrahedrons and classical beam theorie. The diffrence between calculations in fem and by cla...
von frans
Mi 17. Apr 2013, 08:22
Forum: Preprocessing
Thema: best practice for modeling plate.
Antworten: 26
Zugriffe: 20502

best practice for modeling plate.

Hello z88 team, I'm interested in the deflection in thin plate caused by a force. I first designed a beam 1000x100x25 and exported as a step file and meshed this with netgen. this model compared with classical hand calculations is not deflecting enough. a finer mesh gives more deflection however sti...