A steel shaft with an outside diameter of 20 mm is supported in flexible bearings at its ends. Two pulleys are keyed to the shaft, and the pulleys carry belt tensions as shown in Figure P15.77. The...

A steel shaft with an outside diameter of 20 mm is supported in flexible bearings at its ends. Two pulleys are keyed to the shaft, and the pulleys carry belt tensions as shown in Figure P15.77. The yield strength of the steel is

_Y
= 350 MPa. Determine

(a) the factors of safety at points H and K predicted by the maximum-shear-stress theory of failure.

(b) the Mises equivalent stresses at points H and K.

(c) the factors of safety at points H and K predicted by the maximum-distortion-energy theory.