Die Suche ergab 69 Treffer

von selopez
Mo 7. Mai 2012, 09:09
Forum: Preprocessing
Thema: All about tetrahedron meshing
Antworten: 18
Zugriffe: 18279

Re: FE rules in a T16 mesh

Martin: What I did was to deselect de option "picking with middle nodes" at the options menu, and then selected the nodes with the window tool (holding the shift key and moving the window with the mouse). In fact the nodes to select were those of the inside of a hole. I applied then the fo...
von selopez
So 6. Mai 2012, 17:27
Forum: Preprocessing
Thema: All about tetrahedron meshing
Antworten: 18
Zugriffe: 18279

Re: FE rules in a T16 mesh

Sorry, I found the answer. Forces don't apply at middle points (T16). Yes... the Theory Guide... I know... :oops:
von selopez
Fr 4. Mai 2012, 15:47
Forum: Preprocessing
Thema: All about tetrahedron meshing
Antworten: 18
Zugriffe: 18279

All about tetrahedron meshing

In a T16 (Tetgen) meshed model, the application of a set of forces in the mode "calculation with FE rules" seems not to work (don't "apply", don't "save"). It only does in the mode "same value for every node". At the same model, meshed with T17 (Netgen), the m...
von selopez
Sa 28. Apr 2012, 05:17
Forum: Preprocessing
Thema: Randbedingung für Drehpunkt
Antworten: 10
Zugriffe: 4354

Re: Randbedingung für Drehpunkt

YES! I corrected the header number (actually it had to be 2134) and the results look now very coherent. As I told you, to obtain a "composed" z88i5 file, I merged two partial files and in the new one remained the header number of one of them. Again, thanks a lot for your patience and your ...
von selopez
Fr 27. Apr 2012, 16:23
Forum: Preprocessing
Thema: Randbedingung für Drehpunkt
Antworten: 10
Zugriffe: 4354

Re: Randbedingung für Drehpunkt

Certainly I sent you a cut out but your clue about the first number is the right answer. The total of loads is more than 344. Let me try to correct this issue and then I'll comment you the results. If I not get a satisfactory one I'll send you the whole file.

Thanks a lot for your support.
von selopez
Fr 27. Apr 2012, 14:06
Forum: Preprocessing
Thema: Randbedingung für Drehpunkt
Antworten: 10
Zugriffe: 4354

Re: Randbedingung für Drehpunkt

Thank you very much M. Frisch for your answer. You’re right about the statical indetermination (I’ve forgotten that condition). About "composing" z88i5 files, I use to try different loads in the same project by editing the file in the Notepad, changing the pressure values, and saving them,...
von selopez
Fr 27. Apr 2012, 03:10
Forum: Preprocessing
Thema: Randbedingung für Drehpunkt
Antworten: 10
Zugriffe: 4354

Re: Randbedingung für Drehpunkt

"...ann koennen Sie keine Rotationsfreiheitsgrade sperren, weil's die gar nicht gibt: Volumenelemente haben immer nur die 3 Verschiebungsfreiheitsgrade in X, Y und Z..."[/i] Could then conclude that with tetrahedral meshes only "constraints in all directions" can be applied? If s...
von selopez
Do 19. Apr 2012, 14:49
Forum: Preprocessing
Thema: Tetrahedrons 16 or 17?
Antworten: 3
Zugriffe: 2113

Re: Tetrahedrons 16 or 17?

Thank you very much. Your comments are realistic and helpful. Regards.
von selopez
Do 19. Apr 2012, 03:57
Forum: Preprocessing
Thema: Tetrahedrons 16 or 17?
Antworten: 3
Zugriffe: 2113

Tetrahedrons 16 or 17?

According to the Theory Guide, tetrahedra 16 allow more acurate results than the 17 ones. The guide explains convincingly the difference in stiffness between them. While NetGen seems to be more consistent than TetGen, I have been able to obtain well-refined tetrahedra 16 meshes in most of the models...