1. The maximum shear stress in a hollow shaft does not exceed 60MN/m2. If the ratio (ratio) between the inner diameter a

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1. The maximum shear stress in a hollow shaft does not exceed 60MN/m2. If the ratio (ratio) between the inner diameter a

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1. The maximum shear stress in a hollow shaft does not exceed60MN/m2. If the ratio (ratio) between the inner diameterand the outer diameter is 1:2, it shows that the outerdiameteris given by .Where P=measurement of power in kilowatts and N=speed (speed ofrotation) of the shaft in rev/min. Determine the dimensions of sucha shaft transmitting 9000 kW at 600 rev/min., and the angle oftwist per unit length. Take G=80GN/m2.
2. A hollow shaft of 150mm and 75mm diameters, transmitting 750kW with an angular velocity of 15 rad/s. A torque meter records anangle of 2.3° over a length of 3m. Determine the shear strain inthe outer fibers of the shaft and the modulus of rigidity of thematerial.
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