The boll in Fig. 5-8 is 1″-12UNF, machined threads, made of 8740 hot-rolled steel. Stress concentration factor is 2. Initial torque is 1200 in. lb. Assume the coefficient of friction to be 0.10. Load varies continuously from 5000 to 10,000 lb. The part is of steel with area 2 in.2 Find the factor of safety for the bolt. Find the minimum force in the part.
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