A shaft consists of a solid rod (segment AB), and a solid rod inside a rectangular tube (segment BC). For the tube, thickness of each side is given under the cross section. The segments are connected together by rigid discs at points Band C, and the shaft is fixed to the wall at point A. A 10 kN.m CCW torque and a 50 kN.m CW torque are applied respectively at points B and C. The modulus of rigidity for the rod AB is 75 GPa, for the rod BC is 50 GPa, and for the tube BC is 5 GPa. Determine the maximum shear stress in each segment and the angle of twist for point C. [35] A Kim 1.5 m 60 + mm a b D = 20 mm D = 25 mm Cross Section AB Cross Section BC tab = 1 mm %3D tac = 2 mm tbd = 4 mm tcd = 5 mm 40 mm