In: Mechanical Engineering
A 1.5-in-diameter bar has been machined from an AISI 1050 cold-drawn bar. This part is to withstand a fluctuating tensile load varying from 0 to 62 kip. Because of the ends, and the fillet radius, a fatigue stress-concentration factor Kf is 1.85 for 106 or larger life. Estimate the fatigue factor of safety based on achieving infinite life (use Modified Goodman criteria) and the yielding factor of safety. If infinite life is not predicted, estimate the number of cycles to failure (use Modified Goodman criteria).