A 0.375-in.-diameter steel (E = 30,000 ksi] bolt (1) is placed in a copper tube (2), as shown. The copper [E = 16,000 ks

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A 0 375 In Diameter Steel E 30 000 Ksi Bolt 1 Is Placed In A Copper Tube 2 As Shown The Copper E 16 000 Ks 1 (346.32 KiB) Viewed 36 times

A 0.375-in.-diameter steel (E = 30,000 ksi] bolt (1) is placed in a copper tube (2), as shown. The copper [E = 16,000 ksi) tube has an outside diameter of 1.000 in., a wall thickness of 0.11 in., and a length of L = 8.5 in. Rigid washers, each with a thickness of t = 0.125 in., cap the ends of the copper tube. The bolt has 24 threads per inch. This means that each time the nut is turned one complete revolution, the nut advances 1/24 in. The nut is hand-tightened on the bolt until the bolt, nut, washers, and tube are just snug, meaning that all slack has been removed from the assembly, but no stress has yet been induced. What stresses are produced in the bolt and in the tube if the nut is tightened an additional quarter turn past the snug-tight condition? Rigid washer Rigid washer Bolt (1) Tube (2) L If the force induced in the bolt by advancing the nut is F1, and force induced in the tube by advancing the nut is F2, what is the relationship between F1 and F2? Answer: Ob) F1 = 2.666666666667 F2 d) F1 = 2 F2 a) F1 = F2 Oc) F1 =-F2 Save for Later Attempts: 0 of 3 used Submit Answer
Part 2 When the nut has been turned an additional quarter turn past the snug-tight condition, find the distance the nut has advanced. Answer: Anut = in. Save for Later Attempts: 0 of 3 used Submit Answer Part 3 Find a geometry-of-deformation relationship. Express this relationship by entering the difference in the axial deflection of the bolt, 81, and the axial deflection of the tube, 82. Note that when the nut is turned on the bolt past the snug-tight condition, the bolt elongates and the tube shortens. Answer: 81-82 = i in Save for Later Attempts: 0 of 3 used Submit Answer Part 4 Calculate the cross-sectional area of the bolt, A1, and the cross-sectional area of the tube, Az. Answers: A1 = i in.2 A2 = i in.2 Save for Later Attempts: 0 of 3 used Submit Answer
Part 5 Find the force induced in the bolt, F1, and force induced in the tube, F2, when the nut is tightened an additional quarter turn past the snug-tight condition. To do this, consider the force-deformation relationship for axially loaded members and develop a compatibility equation. By convention, a tension force is positive, and a compression force is negative. Answers: F1 = i kips F2= i kips Save for Later Attempts: 0 of 3 used Submit Answer Part 6 Find the normal stress induced in the bolt, 01, and normal stress induced in the tube, 02, when the nut is tightened an additional quarter turn past the snug-tight condition. By convention, a tension stress is positive, and a compression stress is negative. Answers: 01 = i ksi 02 = i ksi Save for Later Attempts: 0 of 3 used Submit Answer