(a) A 3/4 × 3 in. bar of 1045 hot-rolled steel is loaded by a 40,000-lb force in simple tension. Find the factor of safety based on the yield strength.
(b) Find the factor of safety if the bar is continuously loaded with Pmax = 40,000 lb and Pmin = 30,000 lb; K =1.5.
(c) Same but the loading is Pmax = 40,000 lb and Pmin = 20,000 lb.
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