The shaft in Figure P4.33 is supported in flexible bearings at A and D, and two gears B an...

The shaft in Figure P4.33 is supported in flexible bearings at A and D, and two gears B and C are attached to the shaft at the locations shown. The gears are acted on by tangential forces as shown by the end view. The shaft is made of a ductile steel having a yield stress Y = 290 MPa. If the factor of safety for the design of the shaft is SF = 1.85, determine the diameter of the shaft using the maximum shear-stress criterion for the initiation of yielding failure.

FIGURE P4.33