Wednesday, 20 March 2019

EXAMPLE 3.5.2. TORQUE CAPACITY OF TWO-ROW BOLT COUPLING

A flanged bolt coupling consists of eight 10mm-diameter steel bolts on a 400mm diameter, and another set of  six 10mm-diameter steel bolts on a concentric 300mm diameter bolt circle. What torque can be applied without exceeding a shear stress of 60 MPa in the bolts?


The relationship between the outer circle and the inner circle of bolts is:

                                               

Both radii are given, but between  and , identify which bolt circle should the maximum shear stress be correlated. Since it is the maximum, this would signify using the outer radius of bolts. 

We can solve for  (for one bolt in the outer circle) which is located at the outer bolt circle:



With the value of  determined,  is computed from the previous relationship equation:








After these two parameters are known, solve for the summation of T.










RELATED TOPIC:

3.0. TORSION

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