25_ch 14 Mechanical Design budynas_SM_ch14

25_ch 14 Mechanical Design budynas_SM_ch14 -...

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Unformatted text preview: budynas_SM_ch14.qxd 12/05/2006 17:39 Page 373 FIRST PAGES 373 Chapter 14 Modification of St by ( Y N ) P = 0.832 produces ( σall ) P = 45 657 psi, Similarly for ( Y N ) G = 0.859 ( σall ) G = 47 161 psi, and t W1 = 4569 lbf, H1 = 228 hp t W2 = 5668 lbf, H2 = 283 hp From Table 14-8, Cp = 2300 psi. Also, from Table 14-6: 0.99 ( Sc ) 107 = 180 000 psi Modification of Sc by (Y N ) produces ( σc, all ) P = 130 525 psi ( σc, all ) G = 138 069 psi and t W3 = 2489 lbf, H3 = 124.3 hp t W4 = 2767 lbf, H4 = 138.2 hp Rating Hrated = min(228, 283, 124, 138) = 124 hp 14-28 Ans . Grade 2 9310 carburized and case-hardened to 285 core and 580 case in Prob. 14-27. Summary: Table 14-3: 0.99 ( St ) 107 = 65 000 psi ( σall ) P = 53 959 psi ( σall ) G = 55 736 psi and it follows that t W1 = 5399.5 lbf, H1 = 270 hp W2 = 6699 lbf, H2 = 335 hp t From Table 14-8, C p = 2300 psi. Also, from Table 14-6: Sc = 225 000 psi ( σc, all ) P = 181 285 psi ( σc, all ) G = 191 762 psi Consequently, t W3 = 4801 lbf, H3 = 240 hp t W4 = 5337 lbf, H4 = 267 hp Rating Hrated = min(270, 335, 240, 267) = 240 hp. Ans . ...
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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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