17_ch 10 Mechanical Design budynas_SM_ch10

17_ch 10 Mechanical - budynas_SM_ch10.qxd 17:23 FIRST PAGES Page 277 277 Chapter 10 The shaded areas depict conditions outside the recommended

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Chapter 10 277 The shaded areas depict conditions outside the recommended design conditions. Thus, one spring is satisfactory–A313, as wound, unpeened, squared and ground, d = 0 . 0915 in, OD = 0 . 879 + 0 . 092 = 0 . 971 in, N t = 15 . 59 turns 10-24 The steps are the same as in Prob. 10-23 except that the Gerber-Zimmerli criterion is replaced with Goodman-Zimmerli: S se = S sa 1 ( S sm / S su ) The problem then proceeds as in Prob. 10-23. The results for the wire sizes are shown below (see solution to Prob. 10-23 for additional details). Iteration of d for the first trial d 1 d 2 d 3 d 4 d 1 d 2 d 3 d 4 d 0.080 0.0915 0.1055 0.1205 d 0.080 0.0915 0.1055 0.1205 m 0.146 0.146 0.263 0.263 K B 1.151 1.108 1.078 1.058 A 169.000 169.000 128.000 128.000 τ a 29.008 29.040 29.090 29.127 S ut 244.363 239.618 231.257 223.311 n f 1.500 1.500 1.500 1.500 S su 163.723 160.544 154.942 149.618 N a 14.191 6.456 2.899 1.404 S sy 85.527 83.866 80.940 78.159 N t 16.191 8.456 4.899 3.404 S se 52.706 53.239
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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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