The material properties of a machine part are Sut 85 kpsi, f 0 86, and a fully corrected endurance limit of Se 45 kpsi The part is to be cycled at a 35 kpsi and m 30 kpsi for 12 (103) cycles Using the Gerber criterion, estimate the new endurance limit after cycling (a) Use Miners method (b) Use Mansons method

Question: The material properties of a machine part are Sut = 85 kpsi, f = 0.86, and a fully corrected endurance limit of Se = 45

The material properties of a machine part are Sut = 85 kpsi, f = 0.86, and a fully corrected endurance limit of Se = 45 kpsi. The part is to be cycled at σa = 35 kpsi and σm = 30 kpsi for 12 (103) cycles. Using the Gerber criterion, estimate the new endurance limit after cycling.
(a) Use Miner’s method.
(b) Use Manson’s method.

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