A stepped shaft ABC consisting of two solid circular segments is subjected to torques T1 and T2 acting in opposite directions, as shown in the figure. The larger segment of the shaft has diameter d1 = 2.25 in. and length L1 = 30 in.; the smaller segment has diameter d2 = 1.75 in. and length L2 = 20 in. The material is steel with shear modulus G = 11 ( 106 psi, and the torques are T1 = 20,000 lb-in. and T2 = 8,000 lb-in.

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Tmax T2 2