34_ch 03 Mechanical Design budynas_SM_ch03

34_ch 03 Mechanical Design budynas_SM_ch03 - 1 / 8 = 9 ....

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Chapter 3 47 Torque carrying capacity reduces with r i . However, this is based on an assumption of uni- form stresses which is not the case for small r i . Also note that weight also goes down with an increase in r i . 3-35 From Eq. (3-47) where θ 1 is the same for each leg. T 1 = 1 3 G θ 1 L 1 c 3 1 , T 2 = 1 3 G θ 1 L 2 c 3 2 T = T 1 + T 2 = 1 3 G θ 1 ( L 1 c 3 1 + L 2 c 3 2 ) = 1 3 G θ 1 ± L i c 3 i Ans. τ 1 = G θ 1 c 1 , τ 2 = G θ 1 c 2 τ max = G θ 1 c max Ans. 3-36 (a) τ max = G θ 1 c max G θ 1 = τ max c max = 12 000
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Unformatted text preview: 1 / 8 = 9 . 6(10 4 ) psi/in T 1 / 16 = 1 3 G 1 ( Lc 3 ) 1 / 16 = 1 3 (9 . 6)(10 4 )(5 / 8)(1 / 16) 3 = 4 . 88 lbf in Ans. r i (in) (deg) 4.50 4.55 4.65 4.60 4.70 4.75 4.80 4.85 0.3 0.2 0.1 0.4 0.5 r i (in) T (lbf in) 400 200 600 800 1000 1200 0.3 0.2 0.1 0.4 0.5...
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This note was uploaded on 12/13/2011 for the course EML 3013 taught by Professor Shingley during the Fall '11 term at UNF.

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