Solve Prob. 630 except let w1 = 2.5 in, w2 = 1.5 in, and the force fluctuates

Solve Prob. 6–30 except let w1 = 2.5 in, w2 = 1.5 in, and the force fluctuates between a tension of 16 kips and a compression of 4 kips.

Prob. 6–30, 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 16 kip.

Neglect column action and find the least factor of safety if the material is cold-drawn AISI 1018steel.

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u2 Section A-A