. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . Fig. 160. — Railroad Track of Leveling Instrument for Measuring the Depression of the Fig. 161. — Railroad Track of Micrometer for Determining the Fibre Stress in the Base of the Rail. STRESSES IN THE RAIL 221 points on the rails was also determined with reference to the cantilevers in someof the experiments instead of using stakes. The fiber stresses were determined in the base of the rail by measuringthe elo
. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . Fig. 160. — Railroad Track of Leveling Instrument for Measuring the Depression of the Fig. 161. — Railroad Track of Micrometer for Determining the Fibre Stress in the Base of the Rail. STRESSES IN THE RAIL 221 points on the rails was also determined with reference to the cantilevers in someof the experiments instead of using stakes. The fiber stresses were determined in the base of the rail by measuringthe elongation or compression of the metal on a gauged length of 5 inches,established on the top surface of the outer flange, observing the strains whenthe wheels were directly over or when spanning the gauged length (see Fig. 161). The observed strains were then computed for the stresses per square inch,assuming a modulus of elasticity of 30,000,000 pounds per square inch andthat the fibers in the base were strained proportionally to their distance fromthe neutral axis of the rail; the computed stresses referring to the outside fibersmost remote from the neutral axis. It will be observed that the strains and the computed stresses refer toa gauge
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Keywords: ., bookcentury1900, bookdecade1910, bookidsteelrailsth, bookyear1913
