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682_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

# 682_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

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676 CHAPTER 8 Applications of Plane Stress Solution 8.5-1 b 1 3.6 ft b 2 2.2 ft P 1400 lb d 2 7.5 in. d 1 6.8 in. V ERTICAL ARM AB M AXIMUM TENSILE STRESS s t 5100 psi ; s t P A + M a d 2 2 b I M P 2 b 1 2 + b 2 2 M 7.088 * 10 4 lb # in. I p 64 a d 2 4 d 1 4 b I 50.36 in. 4 A p 4 a d 2 2 d 1 2 b A 7.862 in. 2 M AXIMUM COMPRESSIVE STRESS M AXIMUM SHEAR STRESS Uniaxial stress t max | s c | t max 5456 psi ; s c 5456 psi ; s c P A M a d 2 2 b I Problem 8.5-2 A gondola on a ski lift is supported by two bent arms, as shown in the figure. Each arm is offset by the distance
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Unformatted text preview: b ± 180 mm from the line of action of the weight force W . The allowable stresses in the arms are 100 MPa in tension and 50 MPa in shear. If the loaded gondola weighs 12 kN, what is the minimum diameter d of the arms? (a) (b) b d W W 08Ch08.qxd 9/18/08 11:06 AM Page 676...
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