Re: Sway bar diameter / solid / tube, etc. - Saab Performance Bulletin Board - Saabnet.com
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Polar moment is for torsion, section modulus is for bending. Still, a hollow bar can be made lighter and stiffer in torsion because the exterior "skin" of the bar contributes much more to the stiffness. While ALL the material contributes to the weight.
Say for example you start with a solid 1" bar in pure torsion.
A hollow bar 1.0"OD & 0.75"ID would be 68% of the stiffness but only 44% of the weight.
A hollow bar of 1.2"OD & 1.0"ID would be 107% of the stiffness but only 44% of the weight.
A hollow bar of 1.25"OD & 0.75"ID would be the same weight but 212% stiffness (just more than double).
Posts in this Thread:
- Sway bar diameter / solid / tube, etc., BobD, Fri, 7 Jan 2011 07:58:01
- stiffness/diameter, derf, Thu, 13 Jan 2011 09:24:44
- Basics Re: Sway bar diameter / solid / tube, etc., Paul'sAero, Mon, 10 Jan 2011 20:52:50
- Re: Sway bar diameter / solid / tube, etc., 900 Aero , Mon, 10 Jan 2011 18:59:10
- I would like to be able to increase the rate >>>, BobD, Mon, 10 Jan 2011 08:57:55
- Re: Sway bar diameter / solid / tube, etc., Chris9k , Sat, 8 Jan 2011 22:28:38
- Re: Sway bar diameter / solid / tube, etc., DomP, Sat, 8 Jan 2011 16:27:56
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