3D Connection Design by FEA and by hand
3D Connection Design by FEA and by hand
(OP)
I believe that it gonna take more time than doing connection design by FEA than by hand. My questions are:
- All type of complex connection can designed by hand so no need to use FEA ? That's what the old engineer did in the old day. I guess that we can but maybe conservative.
- 3D models of complex connections have to be created using 3D AutoCad and import them into the FE software analysis ? So You must learn how to draw 3D in AutoCad. Is there any special package to just create 3D connection model nowadays ?
- All type of complex connection can designed by hand so no need to use FEA ? That's what the old engineer did in the old day. I guess that we can but maybe conservative.
- 3D models of complex connections have to be created using 3D AutoCad and import them into the FE software analysis ? So You must learn how to draw 3D in AutoCad. Is there any special package to just create 3D connection model nowadays ?





RE: 3D Connection Design by FEA and by hand
AutoCAD just purchased Algor.
SolidWorks is closely tied to COSMOS and works well with NEiNastran and, most recently, AMPS
Catia has Ansys
Most CAD packages export some format that most FEA packages will read.
Most FEA packages have modeling capability:
All of those mentioned above, many of which also work with FEMAP
Roshaz which has internal analysis capabilities and works as a front-end for Calculix
Etc. Etc.
NEiNastran
Garland E. Borowski, PE
Engineering Manager
Star Aviation
RE: 3D Connection Design by FEA and by hand
No, FEA is not appropriate for ALL design and isn't necessarily faster in all cases. If the connection gets complicated enough, FEA becomes useful.
I believe RISA may be something to look at for your situation.
RE: 3D Connection Design by FEA and by hand
but these days FE tools are very adept at producing answers without much work ... if you start with a 3D CAD model, most CAD packages allow you to apply load here, react it there, and "push a button". the whole catch is "is the model valid?"; if my sentence appealled to you with it's simplicity then you probably should avoid FE 'till you know some of the traps.
good luck !
RE: 3D Connection Design by FEA and by hand
corus
RE: 3D Connection Design by FEA and by hand
RE: 3D Connection Design by FEA and by hand
RE: 3D Connection Design by FEA and by hand
He wanted to know the stress due to a shrink fit between two toruses, one inside the other.
I think in general shrink fits, and general 'cone and spike' problems, are a field where hand calcs are easier than FEA.
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: 3D Connection Design by FEA and by hand
RE: 3D Connection Design by FEA and by hand
I almost gave him a star for exploding my brain.
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: 3D Connection Design by FEA and by hand
corus