**calculation of shear stress of bolt joint of coupling connected to rotating shaft?**

*-kirchwey*

You'd have to know the torque transmitted through the joint. The shear force on the bolt is torque/radius. Stress is force/bolt area. If the bolt runs through the joint such that it receives force in two places of equal radius, you have twice the area, half the stress.

*-draco4843 |*

Let:

Q = the torque of the shaft in Newton- meters

D = diameter of bolt circle in meters

N = number of bolts

d = diameter of bolt in centimeters

V = shear force acting on a bolt in Newtons

v = shear stress in Newtons per cm^2

(1). V = 2Q/(D x N)

(2). v = V/((pi x d^2)/4)

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