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A 1.5-in-diameter bar has been machined from an AISI 1050 cold-drawn bar. This part is to...

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Mechanical Engineering

A 1.5-in-diameter bar has been machined from an AISI 1050cold-drawn bar. This part is to withstand a fluctuating tensileload varying from 0 to 62 kip. Because of the ends, and the filletradius, a fatigue stress-concentration factor Kf is 1.85 for 106 orlarger life. Estimate the fatigue factor of safety based onachieving infinite life (use Modified Goodman criteria) and theyielding factor of safety. If infinite life is not predicted,estimate the number of cycles to failure (use Modified Goodmancriteria).

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