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A steel rotating-beam test specimen has an ultimate strength, Sut of 200 kpsi. Estimate the fatigue strength, Sf. corresponding to a life of 190

A steel rotating-beam test specimen has an ultimate strength, Sut of 200 kpsi. Estimate the fatigue strength, Sf. corresponding to a life of 190 kcycles of stress reversal. Take the value of the fatigue strength fraction, f, from Fig. 6-23. The fatigue strength corresponding to a life of 190 kcycles of stress reversal is kpsi.

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