In a
Nut Shell: Friction
forces acting on a rope or belt wrapped around a fixed circular cylinder
vary exponentially by the relation
T2/T1 = eμsβ where
T2 is the pulling tension on the rope, T1 is the restraining tension of the rope, μs
is the coefficient of static friction between the rope and the fixed
cylinder, and β is the angle of “wrap” around the fixed
cylinder.
T2
= pulling tension of the
rope in lb, Newtons, kips
T1
= restraining tension of the
rope in lb, Newtons, kips
μs
= the coefficient of static
friction between the rope and the fixed cylinder
β
= the angle of “wrap” around
the fixed cylinder measured in radians
See the figure below.
|