A 4 inch diameter composite shaft is subjected to the torques shown below. The sections are perfectly bonded rigidly together. Use GSTEEL= 11,600 ksi and GALUMINUM =4000 ksi. Determine the maximum shearing stress in the shaft and the magnitude of the angle of twist of point D with respect to point A
Point B 22 kip-ft Aluminium clockwise
Point c 20 kip-ft Steel
Point D 7.4 Kip-ft Steel
l A-B 6.6 m
l B-C 4.9 ft
l c-D 3.3 ft