14_ch 15 Mechanical Design budynas_SM_ch15

14_ch 15 Mechanical Design budynas_SM_ch15 - 392 SF n 11 =...

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Unformatted text preview: 392 SF n 11 = σall ( sat 1 ) P ( K L ) P = σ s11 K T K R n 21 = ( sat 1 ) G ( K L ) G s21 K T K R 44( HB ) 21 + 2100 48( HB ) 21 + 5980 44( HB ) 11 + 2100 48( HB ) 11 + 5980 ( sat 1 ) G = ( HB ) 21 s21 SF K T K R ( K L )G ( HB ) 11 ( sat1 ) P = Note: SF = n d , S H = Factor of safety New tabulated strength Chosen hardness Associated hardness ( sat ) G = ( sat ) G − 2100 44 Bhn = ( sat ) G − 5980 48 s11 SF K T K R (KL)P s12 S H K T C R (C L ) P (C H ) P 1/2 n 12 = ( sac1 ) P = = s12 ( sac1 ) P ( C L ) P ( C H ) P s12 K T C R 2 341( HB ) 12 + 23 620 363.6( HB ) 12 + 29 560 ( HB ) 12 (s ac ) P − 23 620 341 Bhn = ( sac ) P − 29 560 363.6 ( sac ) P = σc = C p W t K o K v Cs C xc Fd P I s22 S H K T C R (C L ) G (C H ) G n 22 = ( sac1 ) G = ( sac1 ) G ( C L ) G ( C H ) G s22 K T C R 2 341( HB ) 22 + 23 620 363.6( HB ) 22 + 29 560 ( HB ) 22 (s ac ) G − 23 620 341 Bhn = 1 ( sac ) G − 29 560 363.6 ( sac ) G = s22 = s12 Gear Wear 17:42 ( sat ) P − 2100 44 Bhn = ( sat ) P − 5980 48 ( sat ) P = W t P Ko Kv Km Ks st = = s21 F K x JG W t P Ko Kv Km Ks st = = s11 F K x JP Pinion Wear 12/05/2006 Tabulated strength Load-induced stress (Allowable stress) Gear Bending Pinion Bending First gather all of the equations one needs, then arrange them before coding. Find the required hardnesses, express the consequences of the chosen hardnesses, and allow for revisions as appropriate. budynas_SM_ch15.qxd Page 392 FIRST PAGES ...
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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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