1) Determine the diameter of the pin which will provide a factor of safety of 1.5 guarding against yielding [9 Marks] Part (a) of the figure below shows a knuckle joint with a pin inside it. This joint is subject to a fluctuating load F varying between 0 N and 6000 N in tension. Assume the loading on the rotatable pin is modeled as concentrated force as shown in part (b) of the figure (Free-body-diagram). The shaft is made from AISI1018 hot-rolled steel that was machined to its final diameter. The fatigue stress concentration factor is set to unity. Based on a stress element on the outer surface at the cross-section A:

Fig: 1

Fig: 2



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