On Fri, 12 Apr 2002, Sam Strano wrote:
> At 03:01 PM 4/12/02, James Libecco wrote:
> >Bob, You need to check the actual stiffness of each bar, but from what I
> >have seen, most hollow bars are stiffer than the solid equivalent
> >size. Am I not remembering physics right?
>
> Nope. If the same OD and the same bends, etc..... the hollow bar will be
> softer. Not a lot softer, since the outside does most of the twisting, but
> a bit softer none the less.
Per the equation, a hollow bar will be softer than a solid bar of the same
diameter and material by exactly the amount of a solid bar with the OD of
the hollow bar's ID. Since the stiffness is proportional to I believe the
fourth power of the diameter, as Sam alludes the hollow bar doesn't have
to be much bigger to be as stiff or stiffer. But it *does* have to be
bigger.
KeS
/// unsubscribe/change address requests to majordomo@autox.team.net or try
/// http://www.team.net/mailman/listinfo
/// Partial archives at http://www.team.net/archive
|