Title :
Wheel thermal damage limits
Author :
Stone, Daniel H. ; Carpenter, George F.
Author_Institution :
Dept. of Res. & Test, Assoc. of American Railroads, Chicago, IL, USA
Abstract :
A series of dynamometer tests were conducted to determine the limiting power required to produce wheel thermal damage, or the neutralization of the as-manufactured rim circumferential residual compressive stresses. Dynomometer and saw-cut tests were conducted on low-stress heat-treated CE-28, CH-36 and CB-38 freight car wheels to determine the onset of damage. The effects of various combinations of time and brake shoe power inputs, as well as the effects of rim thickness and the presence of the rail wheel, on the resistance of wheels to thermal damage were investigated. The test results showed that the amount of brake shoe thermal input required to thermally damage heat-treated low-stress wheels is far in excess of that of normal brake application
Keywords :
brakes; brittle fracture; dynamometers; railways; testing; thermal stresses; brake shoe power inputs; brake shoe thermal input; brittle fracture; dynamometer tests; low-stress heat-treated freight car wheels; rapid fracture; rim circumferential residual compressive stresses; rim thickness; saw-cut tests; thermal damage resistance; wheel thermal damage limits; Cogeneration; Footwear; Rails; Railway accidents; Residual stresses; Temperature; Tensile stress; Testing; Thermal stresses; Wheels;
Conference_Titel :
Railroad Conference, 1994., Proceedings of the 1994 ASME/IEEE Joint (in Conjunction with Area 1994 Annual Technical Conference)
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-1890-0
DOI :
10.1109/RRCON.1994.289021
