• 3.63 The composite shaft consists of a copper rod that fits loosely inside an alu-
minum sleeve. The two components are attached to a rigid wall at one end and
joined with an end-plate at the other end. Determine the maximum shear stress in
each material when the 2-kN • m torque is applied to the end-plate. Use G = 26 GPa
for aluminum and G = 47 GPa for copper.