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246_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

246_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

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240 CHAPTER 2 Axially Loaded Members Problem 2.12-6 Five bars, each having a diameter of 10 mm, support a load P as shown in the figure. Determine the plastic load P P if the material is elastoplastic with yield stress Y 250 MPa. Solution 2.12-5 Truss with four bars L AE 60 in. L BE 45 in. J OINT E Equilibrium: or P 6 5 F AE + 8 5 F BE 2 F AE a 3 5 b + 2 F BE a 4 5 b P P LASTIC LOAD P P At the plastic load, all bars are stressed to the yield
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