A shaft has an external diameter (ED) of 350 mm and an internal diameter of 150 mm.                     i.            Calculate the maximum shear stress in the shaft when it is transmitting 3700 kW at 100 rpm. ii.           Find the angle of twist in a length of 20 x ED. (Assume G=75GN/m2). iii.       If the hollow shaft is replaced by a solid shaft of the same weight and length, what power can it transmit for the same maximum shear stress?

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Torsion

In mechanical engineering, torque, torsion, and twisting moment are three of the most important concepts which have different meanings. Torque is the consequence of a moment of a force that produces an angular acceleration in a body or induces rotational kinetic energy in a body. For instance, in an automobile, the power transmission shaft is a body that is always under rotation due to the external torque acting on it, this torque is created by the engine.