700_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

700_Mechanics - 08Ch08.qxd 694 11:06 AM Page 694 CHAPTER 8 Applications of Plane Stress MAXIMUM SHEAR STRESS AT POINT B MAXIMUM SHEAR STRESS AT

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Unformatted text preview: 08Ch08.qxd 9/18/08 694 11:06 AM Page 694 CHAPTER 8 Applications of Plane Stress MAXIMUM SHEAR STRESS AT POINT B MAXIMUM SHEAR STRESS AT POINT C sx 0 sx 0 sy 0 sy 0 txy tmax VQ I (2 t) T d2 2 Ip A Pure shear a sy sx 2 tmax txy 19.943 MPa txy 2 b + t2 xy 19.94 MPa tmax ; VQ T d2 + txy 23.738 MPa 2 Ip I (2 t) sy 2 sx a b + t2 xy A 2 Pure shear tmax Problem 8.5-17 A sign is supported by a pole of hollow circular 8 ft cross section, as shown in the figure. The outer and inner diameters of the pole are 10.5 in. and 8.5 in., respectively. The pole is 42 ft high and weighs 4.0 k. The sign has dimensions 8 ft 3 ft and weighs 500 lb. Note that its center of gravity is 53.25 in. from the axis of the pole. The wind pressure against the sign is 35 lb/ft2. (a) Determine the stresses acting on a stress element at point A, which is on the outer surface of the pole at the “front” of the pole, that is, the part of the pole nearest to the viewer. (b) Determine the maximum tensile, compressive, and shear stresses at point A. ; 23.7 MPa Hilda’s Office 3 ft 10.5 in. 8.5 in. 42 ft X X A A Section X-X ...
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This note was uploaded on 12/22/2011 for the course MEEG 310 taught by Professor Staff during the Fall '11 term at University of Delaware.

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