28_ch 14 Mechanical Design budynas_SM_ch14

28_ch 14 Mechanical Design budynas_SM_ch14 -...

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( σ all ) G = 32 725(0 . 996) 1(0 . 85) = 38 346 psi W t 2 = 38 346(1 . 5)(0 . 5346) 1(1 . 404)(1 . 043)(8 . 66)(1 . 208)(1) = 2007 lbf H 2 = 2007(925) 33 000 = 56 . 3hp ( Z N ) P = 0 . 948, ( Z N ) G = 0 . 973 Table 14-6: 0 . 99 ( S c ) 10 7 = 150 000 psi ( σ c ,allow ) P = 150 000 ± 0 . 948(1) 1(0 . 85) ² = 167 294 psi W t 3 = ³ 167 294 2300 ´ 2 ± 1 . 963(1 . 5)(0 . 195) 1(1 . 404)(1 . 043) ² = 2074 lbf H 3 = 2074(925) 33 000 = 58 . 1hp ( σ c ,allow ) G = 0 . 973 0 . 948 (167 294) = 171 706 psi W t 4 = ³ 171 706 2300 ´ 2 ± 1 . 963(1 . 5)(0 . 195) 1(1 . 404)(1 . 052) ² = 2167 lbf H 4 = 2167(925) 33 000 = 60 . 7hp H rated = min(43 . 7, 56 . 3, 58 . 1, 60 . 7) = 43 . 7hp Ans . Pinion bending controlling 14-34 ( Y N ) P = 1 . 6831(10 8 ) 0 . 0323 = 0 . 928 ( Y N ) G = 1 . 6831 ( 10 8 / 3 . 059 ) 0 . 0323 = 0 . 962 Table 14-3: S t = 55 000 psi ( σ all ) P = 55 000(0 . 928) 1(0 . 85)
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