. The car wheel; giving the results of a series of investigations . 130,000 Lbs. Av. Pressure per Sq. In. 141,304 Lbs Area .92 Sq. 140,000 Lbs. Av. Pressure per Sq. In 137,254 Lbs. Area Sq. In. 150,000 Lbs. Av. Pressure per ^q In. 144 230 Lbs. Area ^, in. CONTACTS BETWEEN 36-IN. STEEL WHEEL AND 100-LB. RAIL. wheel showing that the crushing strength has beenexceeded. A tentative explanation of this phenomenon isthat the hard chilled cast iron wheel is practicallyunyielding and that, when the load is imposed, thewhole of the compression takes place in the rail. Thearea of contact i
. The car wheel; giving the results of a series of investigations . 130,000 Lbs. Av. Pressure per Sq. In. 141,304 Lbs Area .92 Sq. 140,000 Lbs. Av. Pressure per Sq. In 137,254 Lbs. Area Sq. In. 150,000 Lbs. Av. Pressure per ^q In. 144 230 Lbs. Area ^, in. CONTACTS BETWEEN 36-IN. STEEL WHEEL AND 100-LB. RAIL. wheel showing that the crushing strength has beenexceeded. A tentative explanation of this phenomenon isthat the hard chilled cast iron wheel is practicallyunyielding and that, when the load is imposed, thewhole of the compression takes place in the rail. Thearea of contact is small and the average pressure persq. in. of area is high. The yield in the rail holds,for a time, against the increasing load, thus cuttingdown the size of the area between 22,500 lbs. and40,000 lbs. The wheel itself then takes a permanentset, increasing the area of contact very rapidly andlowering the average. In the case of the steel wheel,yielding takes place in both the wheel and the rail. 85 ^- •:»■ 500 Pressure perSq. In. 9,090 .055 Sq. In. m. 4,500 Lbs. Av. Pressure per Sq. In. 50,000 Lbs. Area .09
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Keywords: ., bookcentury1900, bookdecade1900, bookidc, booksubjectrailroadcars
