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Determine the critical diameter in mm for a shaft under bending. The shaft is to be...

Determine the critical diameter in mm for a shaft under bending. The shaft is to be made from a material with a Sut of 600MPa. The shaft is subjected to a maximum bending moment of 9Nm and a midrange torque of 5Nm. The shaft is to be machined, needs to have an efficiency of 95% and operate at room temperature. The required stress-concentration factor (Kf) is 1.7 (Kfs = 1.5). It can be assumed that Kb = 1 and the safety factor required is 1.9.

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