DieselShip's Online Content Library

Q10. In a torsional test on a steel specimen of 18 mm diameter, the elastic limit is reached when the applied torque is 190 Nm and the angle of twist is 1.8 degrees over a length of 140 mm.

A hollow shaft of 60 mm inside diameter and 120 mm outside diameter is made from the same steel. It is required to transmit power at a speed of 500 rev/min. The safety coefficient (factor of safety) for the hollow shaft, based on the elastic limit torsional stress, is to be 3.

Calculate EACH of the following:

(a) The Modulus of Rigidity of the steel;

(b) The maximum power that can be transmitted by the shaft.