HOT SPOT HEATING BY COMPOSITION SHOES

It is generally understood that uneven heating of the tread of a wheel during braking is possible. A method has been devised to measure the intensity and frequency of hot spots on the wheel tread surface. After a description of the measurement apparatus and technique, results of a study of hot spots during constant speed brake applications with single composition shoes are presented. Possible lowering of the hot spot level by increasing the conformability of the brake shoe is studied by cutting one slot across each pad of a brake shoe. This method of hot spot study may be useful for future analysis and improvement of brake shoes.

• Supplemental Notes:
  • Contributed by the Rail Transportation Division of The American Society of Mechanical Engineers for presentation at the IEEE-ASME Joint Railroad Conference, San Francisco, California, April 15-17, 1975.
• Corporate Authors:

  American Society of Mechanical Engineers

  Two Park Avenue
  New York, NY  United States  10016-5990
• Authors:
  • Wetenkamp, H R
  • Kipp, R M
• Publication Date: 1975-4

Media Info

• Features: Figures; References; Tables;
• Pagination: 5 p.

Subject/Index Terms

• TRT Terms: Brake shoes; Braking performance; Composite materials; Cracking; Defects; Temperature measurement; Thermal degradation; Thermal stresses; Wheels
• Old TRIS Terms: Thermal cracks (Wheels); Wheel flaws; Wheel thermal stresses
• Subject Areas: Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00095226
• Record Type: Publication
• Source Agency: American Society of Mechanical Engineers
• Report/Paper Numbers: 75-RT-2
• Files: TRIS
• Created Date: Jul 2 1976 12:00AM