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A bar experiences loading such that O max = 70 ksi and 0 min = –25 ksi. Strength characteristics include the following: Sut Se f 80 ksi 38 ksi 0.85 Construct a modified Goodman diagram and determine the factor of safety against fatigue. If your result is less than 1, it means that finite life is expected, not infinite life. If this is so, find the equivalent completely-reversing stress and use it to estimate the expected life of the bar via the SN method.