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402_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

402_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

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Problem 5.5-6 A freight-car axle is loaded approximately as shown in the figure, with the forces representing the car loads (transmitted to the axle through the axle boxes) and the forces representing the rail loads (transmitted to the axle through the wheels). The diameter of the axle is , the distance between centers of the rails is , and the distance between the forces and is is . Calculate the maximum bending stress in the axle if P 47 kN. s max b 200 mm R P L d 80 mm R P AB 396 CHAPTER 5 Stresses in Beams (Basic Topics) Solution 5.5-7 Seesaw s max M S 10,264 lb-in. 3.0 in. 3 3420 psi ; S bh 2 6 3.0 in. 3 . 855.4 lb-ft 10,264 lb-in. M max Pd + qL 2 2 720 lb-ft

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