. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . ith the running surface on the convex side. Thedeflection at the middle of the length of the piece, 5 feet long, was inch. It is probable, however,that some of this curvature was caused by the strains set up in the rail when cooHng. t Appendix to Report by the Interstate Commerce Commission on Accident to a Lehigh ValleyRailroad Train at Manchester, N. J., on August 25, 1911. See also Broken Lehigh Valley Rail, IronAge, Vol. 8S, Part 2, p. 800. t Some Causes
. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . ith the running surface on the convex side. Thedeflection at the middle of the length of the piece, 5 feet long, was inch. It is probable, however,that some of this curvature was caused by the strains set up in the rail when cooHng. t Appendix to Report by the Interstate Commerce Commission on Accident to a Lehigh ValleyRailroad Train at Manchester, N. J., on August 25, 1911. See also Broken Lehigh Valley Rail, IronAge, Vol. 8S, Part 2, p. 800. t Some Causes Which Tend toward the Fracture of Steel Rails. James E. Howard, JournalAssociation of Engineering Societies, July, 1908. 204 STEEL RAILS Removing the surface metal, in the planer, restores the bending quali-ties of the rail, but in this case it is necessary to plane away the metal from thesides as well as from the top of the head, that is, as far down as the cold flowhas taken place. The difference in the bending qualities of the same rail according tothe head being on the tension or compression side is shown by Fig. 150. The. Fig. 150. — Two of a Worn 100-lb. Rail after Testing. Theupper piece, with head on compression side, bent 21 degrees with-out rupture. The lower i)iece, with head on tension side, bent42 degrees and then ruptured. (Ilowarti.) upper piece of rail in the figure was bent with the head in compression, whilethe lower one had the head on the tension side of the bend. Rails of this series of tests have ruptured with a deflection of only 3 to 5degrees when the head was in tension, but remained unruptured when bentthrough an angle of 20 degrees or more with the base in tension. After an-nealing these old rails, of exhausted toughness, the bending qualities wererestored, after which the rail could be bent in either direction through aboutthe same number of degrees without fracture. STRESSES IN THE RAIL 205 The effect of the exhausted metal in the head is
Size: 1518px × 1646px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidsteelrailsth, bookyear1913
