50 mm 300 mm 100 mm 200 mm 100 mm Prob. 11-17

The shaft consists of rod segments AB and CD, and the tubular segment BC. If the torque T = 10 kN.m is applied to the shaft, determine the required minimum diameter of the rod and the maximum inner diameter of the tube. The outer diameter of the tube is 120 mm, and the material has an allowable shear stress of Tallow = 75 MPa. B TA

Problem # 1: A hollow shaft has an outside diameter 60 mm and a wall thickness of 1.25 mm. The maximum shear stress in the shaft must be limited to 150 MPa. Use G = 43 000 MPa. Determine: (a) the maximum power that can be transmitted by the shaft if the rotation speed must be limited to 20 Hz. (b) the magnitude of the angle of twist in a 700-mm length of the shaft when 30 kW is being transmitted at 8 rpm.