Answer to Question #333889 in Mechanical Engineering for Zozo

Question

An aluminium bar is 200 mm long and has a diameter of 7 mm. It fits centrally

inside a brass tube of the same length. The outside diameter of the tube is 10

mm and the wall thickness is 1 mm. The bar and tube are connected to rigid

end plates, so that they twist together. Find the torsional stiffness for each

shaft. If a torque of 12 N.m is applied to the composite shaft, calculate the (a)

torque transmitted by each; (b) maximum shear stress induced in each; and

(c) angle of twist (GBRAss = 40 GPa and GALUMINIUM = 30 GPa).