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A steel rotor disc of uniform thickness 50mm has an outer rim diameter 800mm and a...

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Mechanical Engineering

A steel rotor disc of uniform thickness 50mm has an outer rimdiameter 800mm and a central hole of diameter 150mm. There are 200blades each of weight 2N at an effective radius of 420mm pitchedevenly around the periphery. Determine the rotational speed atwhich yielding first occurs according to the maximum shear stresscriterion. Yield stress= 750 MPa, ? = 0.304, ? = 7700 kg/m 3

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