Two solid steel shafts are fitted with flanges that are then connected by bolts as shown

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Two solid steel shafts are fitted with flanges that are then connected by bolts as shown. The bolts are slightly undersized and permit a 1.5degree rotation of one flange with respect to the other before the flanges begin to rotate as a single unit. Knowing that G = 11.2 times 106 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.

The torque T is applied to flange B.

The torque T is applied to flange C.