The belt tensions for the pulleys of Fig. 1 fluctuate from the values shown in Fig. 1 (a)...

The belt tensions for the pulleys of Fig. 1 fluctuate from the values shown in Fig. 1 (a) to those given in Fig. 1(b). Details of shaft and hubs are shown in sketch (c). Consider the stress concentration as being due to fillets only. Material tests σyp = 69,000 psi, σult, = 104,000 psi, and σe = 39,000 psi. Let D/d = 1.20 and r/d = 0.125. The factor of safety is 1.9 based on yield point. Draw and dimension the bending moment diagram. Based on the moment just left of the right hub, find the value of d. Include the dead weight of the pulleys.

Figure 1