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Sinopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1878 Excerpt: ...strength ( 1 ), page 534, and (6 ), page 536, become, by substitution, For cast-iron round shafts, W =---= r (12) R 3.6 R T. 1 c ut.do d3 s i3 s 1 tor cast iron square shafts, W = = ( 13 ) R 2.5 R W = the force, in tons. R = the radius of the force, in inches. WR =the moment of the force, in statical inch-tons. d = the diameter of the round shaft, in inches. b = the side of the square shaft, in inches. s-the ultimate tensile strength, in tons per square inch. 1 Annals of Philosophy, vol. xiii. 1819. If the tensile strength, s, be taken at 7.2 tons, for iron of average quality, then, by substitution and reduction:--Ultimate Torsional Strength and Sizes of Cast-Iron S/iafts of average quality. Torsional Deflection Of Cast-iron Bars. In the absence of direct data for the torsioiial deflection of cast-iron bars, it is assumed that it is 12/3 times that of wrought-iron shafts--the same proportion as that of the transverse deflections of cast-iron and wrought-iron shafts, as indicated by a comparison of the formulas (8), page 564, and (5), page 590. Multiply, therefore, the second member of the formula (14), page 592, by 13; the coefficient 1070, or exactly 1073, becomes (1073x3/5 = ) 644:--STRENGTH OF WROUGHT IRON. Tensile Strength. Mr. Telford deduced from his experiments, an average tensile strength of 29.25 tons per square inch for wrought-iron bars. Mr. Barlow deduced from the results of eight bars of wrought iron--Swedish, Russian, and Welsh, from ij inches square to 2 inches in diameter--an average tensile strength of 25 tons per square inch. Mr. Barlow also deduced from experiments on bars of from i inch in diameter to 2 inches square, that the elastic tensile strength of good medium wrought iron was 10 tons per square inch; and that the extension was at ...
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Reseña del editor
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1878 Excerpt: ...strength ( 1 ), page 534, and (6 ), page 536, become, by substitution, For cast-iron round shafts, W =---= r (12) R 3.6 R T. 1 c ut.do d3 s i3 s 1 tor cast iron square shafts, W = = ( 13 ) R 2.5 R W = the force, in tons. R = the radius of the force, in inches. WR =the moment of the force, in statical inch-tons. d = the diameter of the round shaft, in inches. b = the side of the square shaft, in inches. s-the ultimate tensile strength, in tons per square inch. 1 Annals of Philosophy, vol. xiii. 1819. If the tensile strength, s, be taken at 7.2 tons, for iron of average quality, then, by substitution and reduction:--Ultimate Torsional Strength and Sizes of Cast-Iron S/iafts of average quality. Torsional Deflection Of Cast-iron Bars. In the absence of direct data for the torsioiial deflection of cast-iron bars, it is assumed that it is 12/3 times that of wrought-iron shafts--the same proportion as that of the transverse deflections of cast-iron and wrought-iron shafts, as indicated by a comparison of the formulas (8), page 564, and (5), page 590. Multiply, therefore, the second member of the formula (14), page 592, by 13; the coefficient 1070, or exactly 1073, becomes (1073x3/5 = ) 644:--STRENGTH OF WROUGHT IRON. Tensile Strength. Mr. Telford deduced from his experiments, an average tensile strength of 29.25 tons per square inch for wrought-iron bars. Mr. Barlow deduced from the results of eight bars of wrought iron--Swedish, Russian, and Welsh, from ij inches square to 2 inches in diameter--an average tensile strength of 25 tons per square inch. Mr. Barlow also deduced from experiments on bars of from i inch in diameter to 2 inches square, that the elastic tensile strength of good medium wrought iron was 10 tons per square inch; and that the extension was at ...
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