FATIGUE ANALYSIS OF RAILROAD FREIGHT CAR WHEELS UNDER THERMAL LOADING CONDITIONS
When a wheel is subjected to repeated thermal loading from drag braking conditions, cracks can develop and propagate due to fatigue. Wheels of 36, 33 and 28 inch diameter were studied using the finite element method. The wheels were subjected to drag braking thermal inputs of 30, 40 and 50 hp, each applied for 30 minutes. The fatigue life was calculated for an assumed load history using Miner's linear cumulative damage rule. The temperature distribution in the wheel was obtained by means of the DOT computer program. The CREEP-PLAST program was then used to calculate the stress and strain distributions. The stress and strain values increased as the braking horsepower increased. For the same thermal loading conditions, the calculated fatigue life was lower for the smaller wheels than for the larger wheels.
Chicago, IL United States 60616
- Thomas, T J
- Garg, V K
- Stone, D H
- Publication Date: 1981-2
- Features: Figures; References; Tables;
- Pagination: 54 p.
- TRT Terms: Braking performance; Computer programs; Cracking; Fatigue cracking; Size; Thermal degradation; Thermal stresses; Vehicle design; Wheels
- Old TRIS Terms: Thermal cracks (Wheels); Wheel design; Wheel size; Wheel thermal stresses
- Subject Areas: Design; Railroads; Vehicles and Equipment;
- Accession Number: 00331899
- Record Type: Publication
- Report/Paper Numbers: AAR R-467 Tech Rpt.
- Files: TRIS
- Created Date: Jun 12 1981 12:00AM