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21_Mechanics Homework Mechanics of Materials Solution

21_Mechanics Homework Mechanics of Materials Solution -...

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Unformatted text preview: PROBLEM 1.26 1.9 Two horizontal S-kip forces are applied to pin B of the assembly shown Knowing that a pin ofO.8-in. diameter is used at each connection, determine the maximum value of the average normal stress (a) in link AB, (b) in link BC [.26 For the assembly and loading of Prob. 1‘9, determine (a) the average shearing stress in the pin at C . (b) the average bearing stress at C in member BC. (c) the average bearing stress at B in member BC . SOLUTION Use Jalul- B as 'Pree. body ’0 kiss I: /§ : A8 F3; F F. to F _ a; . A = Q =" - , t Sin Its-o 5..“ 60° SM qs-u &: 3 9 8 k PS l0 KI'FS F-o ‘H‘t' n )1: Law clt Sines me a 1 F5; (CL) Shearing] fitness in PM 4+ C 7:: 2A,. AP 3 Ed‘- = 13;- (o.3)“ 0.5029 m _‘ 8.9658 .. Z' (mas-026) ' 332 (b) BEGIN-rig 5+M55 aJl' C in hie-“Lei" BC A r to! = (o.s)(o.8l= 0.9» in‘ 61,: 3:16?“ = 22.4 ‘ (Q‘s Beewimtl dress oil” 3 in member BC A=2tol =2(0.5)(o.8;) = 0.3 :6 6'5: 867358 =' ”.5“ ...
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