Question: Two identical aluminum plates are each 2 in thick, and are compressed with one bolt and nut. Washers are used under the head of the

Two identical aluminum plates are each 2 in thick, and are compressed with one bolt and nut. Washers are used under the head of the bolt and under the nut.

Washer properties: steel; ID = 0.531 in; OD = 1.062 in; thickness = 0.095 in

Nut properties: steel; height = 7/16 in

Bolt properties: 1/2 in-13 UNC grade 8

Plate properties: aluminum; E = 10.3 Mpsi; Su = 47 kpsi; Sy = 25 kpsi

(a) Determine a suitable length for the bolt, rounded up to the nearest ¼ in.

(b) Determine the bolt stiffness.

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