COMPARISON OF D-5 AND D-7 SPRING FATIGUE LIFE
The fatigue life of the proposed D-7 freight car truck springs with 4 1/4-in. travel and the standard D-5 springs with 3-11/16 in. travel have been experimentally compared. Due to the unequal travels, the springs were fatigue tested on an equal energy basis for a reasonable service loading. The fatigue tests were of the constant amplitude cycle type to two million cycles. Twenty specimens of each spring variation were tested. Results indicated the proposed D-7 springs have a significantly lower failure rate equal to about one third that of the standard D-5 springs.
- Direct requests to J.G. Britton, Director of Operations.
Chicago, IL United States 60616
- Cook, R M
- Publication Date: 1975-10
- Features: Figures; Tables;
- Pagination: 26 p.
- TRT Terms: Car trucks (Railroads); Fatigue (Mechanics); Fatigue tests; Freight cars; Life cycle analysis; Specifications; Spring; Suspension systems; Trucks
- Uncontrolled Terms: Fatigue life
- Old TRIS Terms: Freight car component performance
- Subject Areas: Motor Carriers; Railroads; Vehicles and Equipment;
- Accession Number: 00139456
- Record Type: Publication
- Source Agency: Association of American Railroads
- Report/Paper Numbers: No. R-194 Res. Rpt.
- Files: TRIS
- Created Date: Oct 6 1976 12:00AM