A strain gauge mounted at a potentially critical point in a steel part has recorded the stress history shown below during 20 seconds of typical use. Identical parts have been fatigue tested under constant amplitude loading with R = -1 to give an endurance limit of 60 ksi and a fatigue strength of 140 ksi at N = 1000 cycles. The steel used has an ultimate strength of 165 ksi. Estimate the fatigue life of the part under typical use.How much will the fatigue life in problem 3 (above) be reduced if a mean stress of 10 ksi is added to the stress history given? A strain gauge mounted at a potentially critical point in a steel part has recorded the stress historyshown below during 20 seconds of typical use. Identical parts have been fatigue tested underconstant amplitude loading with R = -1 to give an endurance limit of 60 ksi and a fatigue strengthof 140 ksi at N = 1000 cycles. The steel used has an ultimate strength of 165 ksi. Estimate thefatigue life of the part under typical use.stress (ksi)120100806040200-20-40-60-80-100-120How much will the fatigue life in problem 3 be reduced if a mean stress of 10 ksi is added to thestress history given?

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Answered: A strain gauge mounted at a potentially…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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A strain gauge mounted at a potentially critical point in a steel part has recorded the stress history shown below during 20 seconds of typical use. Identical parts have been fatigue tested under constant amplitude loading with R = -1 to give an endurance limit of 60 ksi and a fatigue strength of 140 ksi at N = 1000 cycles. The steel used has an ultimate strength of 165 ksi. Estimate the fatigue life of the part under typical use.

How much will the fatigue life in problem 3 (above) be reduced if a mean stress of 10 ksi is added to the stress history given?

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