S= 1 4 F nd² = 4F πα?

Mechanics of Materials (MindTap Course List)
9th Edition
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Barry J. Goodno, James M. Gere
Chapter8: Applications Of Plane Stress (pressure Vessels, Beams, And Combined Loadings)
Section: Chapter Questions
Problem 8.2.12P: Solve the preceding problem if the diameter is 480 mm, the pressure is 20 MPa, the yield stress in...
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Why did it became 4F/A from F/A, in (a)

DESIGN PROBLEMS
36.
Solution:
s = axial stress
s = shear stress
(a)
A hook is attached to a plate shown and supports a static load of 12,000 lb. The
material is to be AISI C1020, as rolled. (a) Set up strength equations for
dimensions d, D, h, and t. Assume that the bending in the plate is negligible.
(b) Determine the minimum permissible value of these dimensions. In estimating
the strength of the nut, let D₁ = 1.2d. (c) Choose standard fractional dimensions
which you think would be satisfactory.
S=
F
・nd²
4F
πd
Round Nut
E
==
CHA
HEEL
Centrad
ace²
Problems 36-38.
Transcribed Image Text:DESIGN PROBLEMS 36. Solution: s = axial stress s = shear stress (a) A hook is attached to a plate shown and supports a static load of 12,000 lb. The material is to be AISI C1020, as rolled. (a) Set up strength equations for dimensions d, D, h, and t. Assume that the bending in the plate is negligible. (b) Determine the minimum permissible value of these dimensions. In estimating the strength of the nut, let D₁ = 1.2d. (c) Choose standard fractional dimensions which you think would be satisfactory. S= F ・nd² 4F πd Round Nut E == CHA HEEL Centrad ace² Problems 36-38.
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