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Academics – Applied Mechanics : 2024/MAR/06
Question

Q6. A 75 mm internal diameter hollow shaft drives a 75 mm external diameter solid shaft at a constant rotational speed of 260 rpm via a diametrically fitted shear pin. Both shafts have a modulus of rigidity of 100 GN/m2 and the output power is 12 kW. The maximum allowable shear stress within the pin is 70 MN/m2

Calculate EACH of the following:

(a) the minimum diameter of the shear pin. (8)

(b) the minimum wall thickness of the hollow drive shaft if the maximum angle of twist per metre must not exceed 0.1°. (8)

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