STRESS MEASUREMENTS IN RAILROAD WHEELS VIA THE BARKHAUSEN EFFECT
The feasibility of utilizing the Barkhausen Effect in ferromagnetic steels as a nondestructive means for ascertaining residual stresses in railroad wheels was investigated. Railroad wheels are generally manufactured with compressive stress distributions in the rim to impede the propagation of fissures or thermal cracks caused by brake applications. In service, these compressive stresses may gradually become tensile, thus increasing the potential for wheel failure. Speciments examined using the Barkhausen noise measurement technique included four new wheels and two used wheels. Stress measurements form this nondestructive technique were compared with stress values determined by a dissection method of strain relaxation. Qualitative consistency in these data were observed, although testing of a larger data base will be required to determine the utility of the Barkhausen noise measurement technique for identifying those wheels which are potentially hazardous because of tensile stress buildup.
- Sponsored by the FRA/U.S. DOT, through the Transportation Systems Center.
Southwest Research Institute6220 Culebra Road, P.O. Drawer 28510
San Antonio, TX USA 78228-0510
Washington, DC USA 20590
Transportation Systems Center55 Broadway, Kendall Square
Cambridge, MA USA 02142
- King, R R
- Barton, J R
- Perry, W D
- Publication Date: 1977-2
- Features: Appendices; Figures; References; Tables;
- Pagination: 86 p.
- TRT Terms: Electromagnetic devices; Failure; Inspection; Nondestructive tests; Residual stress; Stresses; Thermal stresses; Tire treads; Wheel rims; Wheels
- Old TRIS Terms: Magnetic inspection; Wheel failure; Wheel rim stresses; Wheel thermal stresses; Wheel tread stresses
- Subject Areas: Railroads; Vehicles and Equipment;
- Accession Number: 00158197
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: FRA-ORD-77/11 Final Rpt., DOTTSC-FRA-76-32
- Contract Numbers: DOT-TSC-713
- Files: TRIS, USDOT
- Created Date: Aug 31 2003 12:00AM