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sway bar sizing

sway bar sizing

sway bar sizing

(OP)
Anybody know how to properly size sway bars without alot of experimenting.  I had some formulas written down in my notes that went over torsion rates, lengths, and diameters but I can't find them.  I spent over two hours trying to find them on the internet and no luck.  Any help would be greatly appreciated.  Thanks in advance.

RE: sway bar sizing

Do you just want the approximate torsional rate - that's easy.

d=diameter
G=shear modulus
M=lever arm*force
L=length of torsional section


Wt=.196*d^3
I=.098*d^4

torsional stress=M/Wt

angular rotation=L*M/(G*I) in radians




Cheers

Greg Locock

RE: sway bar sizing

(OP)
Thank You.  That is all I need.  I appreciate the help.  I am very happy to to have found a forum with intelligent members where I can get a straight answer.  Thanks again.

RE: sway bar sizing

  There is a very good book on basics of anti roll bar design by Fred Puhn of San Diego.  I think it's "How to Make Your Car Handle"  published by H.P. Books  out of Tucson.  It's been many years since I looked at it but as I remember it cut through all the BS of bar design and race car suspension setup.  It is a difficult at best job to do without a lot of trial and error.  

Rod

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