Tutorial Objects - Fe Toys

Hi,

I posted some fun little .stp objects for tutorials and experimentation.

Included are:
A mere cube for testing your installation: cube
Cantalevered Beam: beam
Beam with twisting points: beamtw
Document spring U-Clip: clip
An X-braced Beam: crossbrace
A dovetail: dovetail
A coil spring with ground ends: spring.
A wrench and loose fitting nut: wrenchnut
Simple Bike Frame: bike

www.brendamake.com/design/bemfetoys01.7z

~

Notes:

Other than the bike, most of the objects, are less than 100mm.

I have found that the spring can be troublesome to mesh, and works better with Tetgen, but as for the others, I use Netgen1,2,3. Some meshing sizes work better than the others, with 32 bits, you may get down to a .2 sized mesh, but not much more, and that will take 1.6GB of memory. Some sizes work--others don't

Netgen1,2,3 really shines on the bike frame.

AFAIK, the two piece dovetail cannot be done with the wizards in Salomne.

I posted a pic of the bike, beam, and spring here.
www.brendamake.com/resume/fem/fem.html

Yes, I know the wrench and nut are ill suited to Aster's limitations, but that's what happens in real life : )

--Enjoy : )

Post edited by: Brenda EM, at: 2009/06/22 04:56<br /><br />Post edited by: Brenda EM, at: 2009/06/22 04:59

What is your question?
It is not clear to me.

Second thing: it seems to me that you are using Rhino, ok? Sometimes Rhinoceros files are not wery good: big tolerances and surfaces that are not well closed toghether.

I didn't ask a question. I was trying to make a contribution.

I had also thought of doing a Salome-Meca video tutorial for absolute beginners.
~

I've been working with Rhino for about a year now. I do not see the gaps and tolerance issues you are speaking of. Many other people on CNCzone.com use Rhino. Perhaps it was an import/export issue you had. The default tolerance is .01 mm, but can be changed at at least 1e-09mm. In my experiments, the units were usable to nanometers, but the dimensioning broke down after picometers. If you force Rhino to make bad geometry, it may, but it usually warns you.

I had pretty good results with Rhino exported .stp files, except for the spring which seems to mesh with some mesh sizes, and not others.

Post edited by: Brenda EM, at: 2009/06/24 06:01<br /><br />Post edited by: Brenda EM, at: 2009/06/24 06:22

Because of my experience level, I could only show people the most beginner overview possible. I might as well use the tutorial objects : 0

Take Care,
Brenda<br /><br />Post edited by: Brenda EM, at: 2009/06/25 00:19

Version 02: Added 2 beams variations.
www.brendamake.com/design/fetoys-v02.7z

[I added the beams, in hops that I could show how to compare studies, and they are an example of an object improved with CAELinux study, as the part on the right is lighter than the one on the left, and less likely to break.

I am looking into xvidcap for doing a tutorial, but still need to get the sound going.]<br /><br />Post edited by: Brenda EM, at: 2009/06/27 20:14