37_ch 03 Mechanical Design budynas_SM_ch03

37_ch 03 Mechanical Design budynas_SM_ch03 - , β = . 141...

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50 Solutions Manual • Instructor’s Solution Manual to Accompany Mechanical Engineering Design 3-43 ω = 2 π n / 60 = 2 π (8) / 60 = 0 . 8378 rad/s T = H ω = 1000 0 . 8378 = 1194 N · m d C = ± 16 T πτ ² 1 / 3 = ³ 16(1194) π (75)(10 6 ) ´ 1 / 3 = 4 . 328(10 2 )m = 43 . 3 mm From Table A-17, select 45 mm Ans. 3-44 s = A , d = µ 4 A Square: Eq. (3-43) with b = c τ max = 4 . 8 T c 3 ( τ max ) sq = 4 . 8 T ( A ) 3 / 2 Round: ( τ max ) rd = 16 π T d 3 = 16 T π (4 A ) 3 / 2 = 3 . 545 T ( A ) 3 / 2 ( τ max ) sq ( τ max ) rd = 4 . 8 3 . 545 = 1 . 354 Square stress is 1.354 times the round stress Ans. 3-45 s = A , d = µ 4 A Square: Eq. (3-44) with b = c
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Unformatted text preview: , β = . 141 θ sq = Tl . 141 c 4 G = Tl . 141( A ) 4 / 2 G Round: θ rd = Tl J G = Tl ( π/ 32) (4 A /π ) 4 / 2 G = 6 . 2832 Tl ( A ) 4 / 2 G θ sq θ rd = 1 / . 141 6 . 2832 = 1 . 129 Square has greater θ by a factor of 1.13 Ans. 3-46 808 lbf 362.8 lbf 362.8 lbf 4.3 in 2.7 in 3.9 in 92.8 lbf z x y E C z C x D z D x D Q...
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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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