194_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

194_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

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188 CHAPTER 2 Axially Loaded Members Problem 2.6-13 A circular brass bar of diameter d is member AC in truss ABC which has load P ± 5000 lb applied at joint C . Bar AC is composed of two segments brazed together on a plane pq making an angle ² ± 36° with the axis of the bar (see figure). The allowable stresses in the brass are 13,500 psi in tension and 6500 psi in shear. On the brazed joint, the allowable stresses are 6000 psi in tension and 3000 psi in shear. What is the tensile force N AC in bar AC ? What is the minimum required diameter d min of bar AC ? u = 60 q A B C P p d a N AC N AC ³ ± 0.62 ; b ± ´ A P [ ´ 2 t a + E a ¢ T] 2 t a ±´ E a ¢ T ´ b P A
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Unformatted text preview: Stresses in bar ( L to L) set µ max ± a & solve for P max2 t max ± s x 2 s x ± ´ E a ¢ T ´ R B A Solution 2.6-13 N UMERICAL DATA P ± 5 kips ± 36° ¶ a ± 13.5 ksi a ± 6.5 ksi ja ± 6.0 ksi ja ± 3.0 ksi tensile force N AC Method of Joints at C u ± p 2 ´ a u ± 54° (tension) N AC ± 5.77 kips min. required diameter of bar AC (1) check tension and shear in bars; a · a /2 so shear controls x ± 2 a = 13 ksi 2 t a ± N AC A t max ± s x 2 ; N AC ± P sin(60°) Sec_2.6.qxd 9/25/08 11:40 AM Page 188...
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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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