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700_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

# 700_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

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694 CHAPTER 8 Applications of Plane Stress M AXIMUM SHEAR STRESS AT POINT B M AXIMUM SHEAR STRESS AT POINT C s x 0 s y 0 t xy 19.943 MPa Pure shear t max 19.94 MPa ; t max A a s x s y 2 b 2 + t xy 2 t xy Td 2 2 I p VQ I (2 t ) s x 0 s y 0 t xy 23.738 MPa Pure shear t max 23.7 MPa ; t max A a s x s y 2 b 2 + t xy 2 t xy Td 2 2 I p + VQ I (2 t ) Problem 8.5-17 A sign is supported by a pole of hollow circular cross section, as shown in the figure. The outer and inner diame- ters 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.

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