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1. A steel rotating-beam test specimen has an ultimate strength of 230 kpsi. Show the resulting S-N curve. Estimate the fatigue strength corresponding to

1. A steel rotating-beam test specimen has an ultimate strength of 230 kpsi. Show the resulting S-N curve. Estimate the fatigue strength corresponding to a life of 150 kcycles of stress reversal. (Shigley 6-5)

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