255_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

255_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

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3 Torsion Torsional Deformations Problem 3.2-1 A copper rod of length L ± 18.0 in. is to be twisted by torques T (see figure) until the angle of rotation between the ends of the rod is 3.0°. If the allowable shear strain in the copper is 0.0006 rad, what is the maximum permissible diameter of the rod? Solution 3.2-1 Copper rod in torsion L ± 18.0 in. ² allow ± 0.0006 rad Find d max ± 0.05236 rad f ± 3.0° ± (3.0) a p 180 b rad From Eq. (3-3): ; d max ± 0.413 in. d max ± 2 L ² allow f ± (2)(18.0 in.)(0.0006 rad)
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