The figure shows the free-body diagram of a connecting-link portion having stress concentration at three sections. The dimensions are r=0.25 in, d=0.40 in, h=0.50 in, w1=3.50 in, and w2=3.0 in. The forces F fluctuate between a tension of 5 kip and a compression of 16kip. Neglect column action and find the least factor of safety if the material is cold-drawn AISI 1018 steel.
