A Manual Of Rules Tables And Data For Mechanical Engineers

Author : Daniel Kinnear Clark
Publisher : Rarebooksclub.com
ISBN 13 : 9781230192741
Total Pages : 292 pages
Book Rating : 4.1/5 (927 download)

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Download or read book A Manual of Rules, Tables, and Data for Mechanical Engineers written by Daniel Kinnear Clark and published by Rarebooksclub.com. This book was released on 2013-09 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1891 edition. Excerpt: ... the formula ( 8 ), page 530, to give the deflection of cast-iron bars, within ordinary elastic limits, thus: --Deflection of Cast-Iron Rectangular Bars of Uniform Section. W /s Loaded at the middle, D =, (8) '28,000 b v W I3 Loaded at one end, ... D =------( 9 ) 875 oa3 D = the deflection, I? = the breadth, d = the depth, / = the span, all in inches: W = the load in tons. Cast-Iron Round Bars.--For round bars of uniform diameter, substitute the above-found average value of E, in the general formula ( 24 ), page 533. Then, 3.1416 x E = 3.1416 x 6090 = 19,132, say 19,000. Deflection of Cast-Iron Round Bars. Loaded at the middle, D=--_ ( 10 ) 19,000 dA Loaded at one end, ... D =----( 11 ) 594 i Torsional Strength Of Cast Iron. The only direct experiments recorded, worth notice, on the torsional resistance of cast-iron, are those of Mr. Dunlop at Glasgow, in 1819.' They were made to ascertain the torsional strength of shafts as usually cast in Glasgow at the time. Two old bars of cast iron, about 5 feet long each, one of them 3 inches and the other 4 inches square, were turned down in the lathe at five different places, to ten different diameters, of from 2 to 4 inches. The load was applied at the end of a lever 14 feet 2 inches long. Particulars of the experiments are given in table No. 185; the values of A, the shearing resistance, calculated by the general formula ( 3 ), page 535, are added. Table No. 185.--Torsional Strength Of Cast Iron. 1819. It seems that the ultimate torsional strength increased very nearly as the cube of the diameter, and that the average torsional resistance per square inch of section was 8.375 tons. Assuming, as explained at page 561, that the shearing resistance of cast iron is equal to its direct tensile...