Mechanics of Materials (MindTap Course List)
9th Edition
ISBN: 9781337093347
Author: Barry J. Goodno, James M. Gere
Publisher: Cengage Learning
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Textbook Question
Chapter 3, Problem 3.3.17P
A vertical pole of solid, circular cross section is twisted by horizontal forces P = 1100 lb acting at the ends of a rigid horizontal arm AB (see figure part a). The distance from the outside of the pole to the line of action of each force is c = 5.0 in. (see figure part b) and the pole height is L = 14in.
(a) If the allowable shear stress in the pole is 4500 psi, what is the minimum required diameter dminof the pole?
- Find the torsional stiffness of the pole (kip-in./rad). Assume that G = 10,800 ksi.
- If two translational springs, each with stiffness k = 33 kips/in., are added at 2(75 from A and B (see figure part c), repeat part (a) to find dmin. Hint: Consider the pole and pair of springs as "springs in parallel."
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Chapter 3 Solutions
Mechanics of Materials (MindTap Course List)
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