Question

6. (15 pts)A steel alloy rod will experience cyclic axial loading during a single day according to the stress condition schedule below. For this steel alloy, the tensile strength is

250 MPa and the S-N curve for fully reversed loading is given. (a) What is the fatigue/endurance limit of the steel alloy? (b) Determine the number of days that the rod can endure the prescribed load schedule before failing due to fatigue.

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