ON THE MECHANICAL PROPERTIES OF STEEL. 



213 



TEANSTEKSE STKAIN". 



Exp. XL VIII. — Bar of Steel from the Titanic Steel Co., Worcester. Dimen- 

 sion of bar 1-002 inch square. Length between supports 4 feet 



6 inches. Mark on bar, " C X." 



Eesidts of Exp. XLYIII. 



Here the -weight (w) at the limit of elasticity is 960 lbs., and the corre- 

 sponding deflection (o) is 1-249. 



Bv formula (6). — The mean value of the deflection for unity of pressure 

 and ^section (D,) = -001237. 



By formula (7). — The mean value of the modulus of elasticity (E) 

 = 31,823,000. 



By formula (2). — The modulus of elasticity (E) corresponding to 112 lbs. 

 pressure = 34,879,000. 



By formula (8). — Work of deflection (TJ) up to the limit of elasticity 

 = 49-960. 



By formula (9). — Work of deflection («) for unity of section = 49-76. 



By formula (12). — Value of C, the imit of working strength =5-739 tons. 



