2. a. Knowing that the allowable shearing stress is 8ksi, for the stepped shaft shown, determine the magnitude of the largest torque, T, that can be transmitted by the shaft when the radius of the fillet is r = = 3/16 in. b. If we keep the same dimensions, but as a flat bar with fillets, what is the maximum stress? T' 2 in. 1.5 in. T

! Required information The torques shown are exerted on pulleys A and B. Consider TA = 360 N·m and Tg = 400 N.m. TA 30 mm TB 46 mm OXX Knowing that both shafts are solid, determine the maximum shearing stress in shaft BC. MPa. The maximum shearing stress in shaft BC is

The shafts of the pulley assembly shown are to be redesigned. The allowable shearing stress in each shaft is 11 ksi. Determine the smallest allowable diameter of shaft AB and shaft BC.

b) The torques shown in Fig. Q1(b) are exerted on pulleys A, B, C and D. Knowing that each shaft is solid, 120 mm long and made of steel with Modulus of Rigidity of 77 GPa and Modulus of Elasticity of 70 GPa i) Compute the angle of twist between A and C with the aid of free body diagrams. i1) State the direction of the twist (either clockwise or counterclockwise) for question Q1(b)i. 120 N-m 90 N-m D 60 N-m 20 mm C 15 N-m 15 mm 10 mm Fig. Q1(b)