A thin-walled tube made of unidirectional composite lamina with a fiber direction with its axis is loaded in torsion as shown in the following figure. Using the maximum stress criterion to determine the transition angle (designated as 0c) at which the failure mode shifts from shear to transverse compression. The lamina material properties are as follows: E = 5E = 10G2, V12 = 0.3, X = 1.5X = 7.5Y = 20Y = 10S T X 60 Hint: the shear stress in x-y coordinates resulted from the torque T is: Txy Where r is the mean radius of curvature. J is the polar moment of inertia of the tube cross-section (all these can be found from any strength of material book). = Tr J