Report of the Tests of Metals and Other Materials for Industrial Purposes Made with the United States Testing Machine at Watertown Arsenal, Massachusetts, During the Year Ended ...

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U.S. Government Printing Office, 1903 - Building materials
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Page 120 - The unstreaked hoop fractured along an element not previously characterized by any unusual local appearance of the metal. COMPARISONS OF THE RESULTS AND CONCLUSIONS REACHED. 1. The elastic limits of the hoops possessed the values indicated by the specimen tests. 2. Each hoop successfully endured 500 repetitions of a load closely approaching but within the elastic limit of the metal. 3. The presence of streaks exerted a marked influence on the ultimate strength and elongation of the metal. 4. The...
Page 3 - Very respectfully, ELIHU ROOT, Secretary of War. The SPEAKER OF THE HOUSE OF REPRESENTATIVES. OFFICE OF THE CHIEF OF ORDNANCE US ARMY, Washington, January 24, 1003.
Page 120 - Under the corrected figures the strength of the streaked hoop is 77 per cent that of the unstreaked. (5) Compared with their respective tensile specimens the following values appear: Streaked hoop, deficiency in strength, 11,349 pounds per square inch; unstreaked hoop, excess in strength, 15,889 pounds per square inch; the streaked hoop has...
Page 175 - .564. Sectional area, .25 square inch. Gauged length, 3". General summary. Tensile strength per square inch of original section pounds Klastic limit per square inch of original section do.
Page 3 - I have the honor to submit, for transmission to Congress as required by law, a copy of the report of the commanding officer of...
Page 92 - Elongation per inch under strain at elastic limit do. . . Reduction in diameter at point of rupture do. . . Reduction in area after rupture, per cent of original section 47.2 Position of rupture 1...
Page 258 - .41 ; area, .1320 square inch. Contraction of area, 47.2 per cent. Fractured ".70 from the neck. Appearance, fibrous, seamy. 718 Applied load».
Page 120 - ... inches long by 0.15 inch deep in an oblique direction at its maximum. This and other streaks in the hoop gradually increased in prominence as the interior pressures advanced beyond the elastic limit of the metal. The unstreaked hoop fractured along an element not previously characterized by any unusual local appearance of the metal.
Page 314 - .14, ".19, ".43*. Diameter at fracture, ".35; area, .0962 square inch. Contraction of area, 61.5 per cent. Fractured I'M from the neck. Appearance, fine silky. Applied loads per square inch. In gauged length. Elongation. Set. Remarks. Pounds. 1,000...
Page 120 - The excess in strength and elongation of the unstreaked hoop over the specimen test is attributed to the reenforcing influence of the flanges of the hoop. 8. The deficiency in strength and elongation of the streaked hoop over the specimen test is attributed to the presence of streaks in the metal.

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