Page 235 - Shigley's Mechanical Engineering Design

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210 Mechanical Engineering Design
4–110 If drawn, a figure for this problem would resemble that for Prob. 4–90. A strut that is a standard
1
hollow right circular cylinder has an outside diameter of 3 in and a wall thickness of in and is
4
compressed between two circular end plates held by four bolts equally spaced on a bolt circle
of 4.5-in diameter. All four bolts are hand-tightened, and then bolt A is tightened to a tension
of 1500 lbf and bolt C, diagonally opposite, is tightened to a tension of 9000 lbf. The strut
axis of symmetry is coincident with the center of the bolt circles. Find the maximum compres-
sive load, the eccentricity of loading, and the largest compressive stress in the strut.
4–111 Design link CD of the hand-operated toggle press shown in the figure. Specify the cross-section
dimensions, the bearing size and rod-end dimensions, the material, and the method of processing.

F
A

B
L
l
Problem 4–111
C
L = 9 in, l = 3 in, θ min = 0°.
l
D

4–112 Find the maximum values of the spring force and deflection of the impact system shown in the
figure if W = 30 lbf, k = 100 lbf/in, and h = 2 in. Ignore the mass of the spring and solve using
energy conservation.

W
y
k
Problem 4–112
h

4–113 As shown in the figure, the weight W 1 strikes W 2 from a height h. If W 1 = 40 N, W 2 = 400 N,
h = 200 mm, and k = 32 kN/m, find the maximum values of the spring force and the deflection
of W 2 . Assume that the impact between W 1 and W 2 is inelastic, ignore the mass of the spring, and
solve using energy conservation.

h
W 1
W 2
Problem 4–113 y
k