hw11.Fall.2010x

# hw11.Fall.2010x - 2 the grip L G is 3.0 inches 3 both of...

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ME 452: Machine Design II Homework Set 11 Problem 1. Calculate the axial load that will stress an SAE 3/8” UNF Grade 5 bolt to its proof strength assuming: a. Shear failure of the nut threads when one thread takes the entire load. b. Shear failure of the nut threads when all the threads equally share the load. c. Shear failure of the bolt threads when one thread takes the entire load. d. Shear failure of the bolt threads when all of the threads equally share the load. e. Tensile failure of the bolt on area A t . Problem 2. For the bolted joint shown in Figure (a) in Table 8-7, page 426 of Shigley’s Mechanical Engineering Design : Assume: 1. the bolt is ½” UNF Grade 8, 3.5” long,
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Unformatted text preview: 2. the grip, L G , is 3.0 inches, 3. both of members, the washer, and the bolt are all steel. 4. the radial clearance between the bolt and members is negligible. Then: a. Find the member stiffness, k m . b. Find the bolt stiffness, k b . c. Find the joint constant, C. d. Plot the force in the bolt, F b , and the force in the members, F m , versus applied load, P, when the preload force is 90% of the proof load. Show the value of P at which the joint separates. e. Plot the force in the bolt, F b , and the force in the members, F m , versus applied load, P, when the preload force is 60% of the proof load. Show the value of P at which the joint separates....
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