urethane suspension bushings
urethane suspension bushings
(OP)
My Google-fu has come up short-
For an automotive suspension design, in a mostly street application:
What would be an acceptable loading for urethane bushings, such as these:
Link
Since it's not a bonded setup, it would strictly be compression against the projected area of the inner sleeve.
What kind of static psi loading would be reasonable?
(a pair of bushings will transmit spring loads to each hub.)
Or am I totally screwing up here?
The total vehicle is 2400 lbs, with about 1400 on this end.
(rear, driven, not supposed to steer)
Regards
Jay
For an automotive suspension design, in a mostly street application:
What would be an acceptable loading for urethane bushings, such as these:
Link
Since it's not a bonded setup, it would strictly be compression against the projected area of the inner sleeve.
What kind of static psi loading would be reasonable?
(a pair of bushings will transmit spring loads to each hub.)
Or am I totally screwing up here?
The total vehicle is 2400 lbs, with about 1400 on this end.
(rear, driven, not supposed to steer)
Regards
Jay
Jay Maechtlen
http://www.laserpubs.com/techcomm





RE: urethane suspension bushings
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: urethane suspension bushings
Well, that's - interesting.
I get a projected area of ~ .84 in^2 (that's bolt diameter, not sleeve - assuming the outer edges of the sleeve aren't doing much)
Which would give a load at yield of ~5900 lbs per bushing, * two bushings.
Not a huge safety, with total load (3G bump at max cornering) calculated at ~ 4000 lbs.
- Why did you suggest 350 lbs? Massive safety factor?
Bushing failure will make things go wobbly, but should give lots of warning before anything can come apart.
I can fab this pretty easily - but it looks really hard to use a ball joint there.
If necessary, I could go with some other kind of bushings or bearings there.
Regards
Jay
Jay Maechtlen
http://www.laserpubs.com/techcomm
RE: urethane suspension bushings
Failure will be noisy but not life threatening, SOP during testing is to remove all the rubber from all the suspension bushes and check that the thing is still drivable, and I've driven a few and they are.
If you can find a nice OEM part from a strut it'll last longer, you may need a double metal and push it into the welded tube.
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: urethane suspension bushings
Thanks!
Jay Maechtlen
http://www.laserpubs.com/techcomm
RE: urethane suspension bushings