Calculate anti-roll bar stiffness contribution to roll resistance and its effect on lateral weight transfer distribution.
Input Parameters
Results
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Bar Roll Rate
ft-lbs/deg
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Bar Stiffness (at wheel)
lbs/in
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Moment of Inertia
in⁴
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Roll Stiffness Contribution
%
Note: Stiffer front anti-roll bar increases understeer. Stiffer rear bar increases oversteer. Hollow bars save weight with similar stiffness to solid bars.
Reference
J = pi x d⁴ / 32 (polar moment of inertia)
Bar K = G x J / (Bar Length x Arm²)
G (steel) = 11.5 x 10⁶ psi
Wheel Rate = Bar K x 2 (both sides)
Roll Rate = Wheel Rate x Track² / 2