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A rotating beam specimen (4130 steel) with an endurance limit of 50 ksi and an ultimate strength of 125 ksi is cycled 20% of the time at 70 ksi (N: 11,683 cycles), 50% at 55 ksi (N2: 283,509 cycles) and 30% at 40 ksi (N3: infinite cycles). Estimate the number of cycle to failure.

A rotating beam specimen (4130 steel) with an endurance limit of 50 ksi and an ultimate strength of 125 ksi is cycled 20% of the time at 70 ksi (N: 11,683 cycles), 50% at 55 ksi (N2: 283,509 cycles) and 30% at 40 ksi (N3: infinite cycles). Estimate the number of cycle to failure.

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A rotating beam specimen (4130 steel) with an endurance limit of 50 ksi and an ultimate strength of 125 ksi is cycled 20% of the time at 70 ksi (N: 11,683 cycles), 50% at 55 ksi (N2: 283,509 cycles) and 30% at 40 ksi (N: infinite cycles). Estimate the number of cycle to failure.
Transcribed Image Text:A rotating beam specimen (4130 steel) with an endurance limit of 50 ksi and an ultimate strength of 125 ksi is cycled 20% of the time at 70 ksi (N: 11,683 cycles), 50% at 55 ksi (N2: 283,509 cycles) and 30% at 40 ksi (N: infinite cycles). Estimate the number of cycle to failure.
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