Problem 1 (Section A: Answer all): A bar is subjected to alternating shear stress of 45 kpsi and alternating bending stress of 25 kpsi. The minimum properties of the bar are, endurance limit, Se = 90 kpsi; yield strength, S, = 120 kpsi; and ultimate strength, Sut = 150 kpsi. The fatigue factor of safety using the Soderberg criterion is O 1.1 O 2.0
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