Two solid steel shafts are fitted with flanges that are then connected by bolts as shown. The bolts are slightly undersized and permit a 1.5? rotation of one flange with respect to the other before the flanges begin to rotate as a single unit. Knowing that C = 11.2 x 10 ⁶ psi, determine the maximum shearing stress in each shaft when a torque of T of magnitude 420 kip ? ft is applied to the flange Indicated.

3.55 The torque T is applied to flange B.

3.56 The torque T is applied to flange C.

1.25 in. 2 ft B Fig. P3.55 and P3.56 1.5 in. T= 350 lb-ft 3 ft D