compliance

[Frank]

i have noticed a lot of people are interested in compliance, i am too

i have question

in the case of camber compliance..

how do you analyse a design? I assume the compliance from the bearing compliment will be an order of magnitude greater than the rest of the mechanism?

do you physically measure the bearing compliance before designing?

regards

Frank

[Frank]

i have noticed a lot of people are interested in compliance, i am too

i have question

in the case of camber compliance..

how do you analyse a design? I assume the compliance from the bearing compliment will be an order of magnitude greater than the rest of the mechanism?

do you physically measure the bearing compliance before designing?

regards

Frank

[Denny Trimble]

Frank,
We've measured rodend stiffness on an instron, but we haven't measured wheel bearing assemblies yet. We did the physical test of the entire system last year, so we should be able to infer that "unknown" from the system stiffness, with all the other stiffnesses known or calculated from FEA.

Mike T, have you estimated wheel bearing stiffness yet? You don't have much else to do right now, do you? http://fsae.com/groupee_common/emoticons/icon_smile.gif

[PatClarke]

Frank, this pic might be of interest to youhttp://www.f1total.com/bilder/2004/tests/04jerez5/z140.jpg
Pat

[Frank]

and it is?

[Charlie]

I'm guessing those sensors measure proximity to the center node, which would show wheel compliance?

[Denny Trimble]

It looks more like a load cell wheel to me, for measuring forces on the wheel during driving. But I'm not sure...

[powered by wattard]

Where not so high tech here at Melb Uni. In 2003, when we suspected our rim centres were flexing like crazy, out came the chewing gum which was carefully placed on the brake caliper, 10mm from the centre.

When the chewing gum disappeared after 1 corner, we knew we were in deep &*^%. I now carry a fresh packet in the toolbox evry time the car goes out.

Will Attard
MUR 2000-2004

[PatClarke]

Frank, it looks like an extraordinarily expensive way to increase unsprung weight to me http://fsae.com/groupee_common/emoticons/icon_wink.gif
But basically Charlie and Denny have it about right, or as close as I can figure.
Pat

[Alan]

I agree with Denny. Kistler and MTS both make wheel force transducers that look a lot like the picture.