# Homework Help: Shear stress with 4 bots

1. Nov 11, 2011

### bennetg

1. The problem statement, all variables and given/known data

A flange coupling is use to transmit torque of 1500 Nm between two shafts. The coupling has four 8mm dia. bolts equally spaced on a PCD of 175mm. Determine the shear stress on the bolts

2. Relevant equations

$fs=\frac{F}{A}$

3. The attempt at a solution

Back of the book answer = 85.3MPa. but I don't know how they get this answer.

2. Nov 12, 2011

### bennetg

It's ok, disaster averted.

Just use t=F*r to convert the torque to a force acting on the bolt's.

Unfortunately TAFE forgot to give me this formula before giving me this question.