Torsional Stiffness of Body
Torsional Stiffness of Body
(OP)
Hello All,
I am working on designing a frame (Roll-cage) for BAJA SAE. I am wondering if there is any thumb-rule for torsional stiffness of the roll-cage?
I mean if there is any thumb-rule relating the roll stiffness of suspension and torsinal stiffness of roll-cage.
regards
I am working on designing a frame (Roll-cage) for BAJA SAE. I am wondering if there is any thumb-rule for torsional stiffness of the roll-cage?
I mean if there is any thumb-rule relating the roll stiffness of suspension and torsinal stiffness of roll-cage.
regards





RE: Torsional Stiffness of Body
Good 2 seater production cars during the 80s might have been 4000 lb ft/degree.
There seem to be some handling benefits in increasing it to 10000 lb ft/degree, but I suspect 6000 is a sweet spot.
However this has to be offset against increased weight and cg height, both of which have far more direct bearing on handling than torsional stiffness.
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: Torsional Stiffness of Body
Thanks a lot!
RE: Torsional Stiffness of Body
- does a particular stiffness value mean the same for a FSAE versus a Miata-sized vehicle versus a larger vehicle?
or, maybe I should ask "what does the different body size imply, if using the same target stiffness?"
Jay Maechtlen
http://www.laserpubs.com/techcomm
RE: Torsional Stiffness of Body
On the other hand I know that a 4000 lb ft/deg sportscar can run out of shock absorber-reacting stiffness, so you might argue that cars with beefier shock calibrations need stiffer bodies.
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?