Solved: A rotating-beam specimen with an endurance limit
Chapter 6, Problem 6-60(choose chapter or problem)
A rotating-beam specimen with an endurance limit of 50 kpsi and an ultimate strength of 140 kpsi is cycled 20 percent of the time at 95 kpsi, 50 percent at 80 kpsi, and 30 percent at 65 kpsi. Let f = 0.8 and estimate the number of cycles to failure.
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