246_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

246_Mechanics - Sec_2.8-2.12.qxd 240 11:44 AM Page 240 CHAPTER 2 Axially Loaded Members Solution 2.12-5 Truss with four bars PLASTIC LOAD PP At the

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Unformatted text preview: Sec_2.8-2.12.qxd 240 9/25/08 11:44 AM Page 240 CHAPTER 2 Axially Loaded Members Solution 2.12-5 Truss with four bars PLASTIC LOAD PP At the plastic load, all bars are stressed to the yield stress. YAAE FAE PP FBE YABE 6 8 sY AAE + sY ABE 5 5 ; SUBSTITUTE NUMERICAL VALUES: AAE sY LAE 60 in. JOINT E LBE 45 in. PP Equilibrium: 3 4 2FAE a b + 2FBE a b 5 5 or 6 8 P F + FBE 5 AE 5 0.307 in.2 ABE 0.601 in.2 36 ksi 6 8 (36 ksi) (0.307 in.2) + (36 ksi) (0.601 in.2) 5 5 13.26 k + 34.62 k ; 47.9 k P Problem 2.12-6 Five bars, each having a diameter of 10 mm, support a b b b b load P as shown in the figure. Determine the plastic load PP if the material is elastoplastic with yield stress Y 250 MPa. 2b P ...
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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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