SLEEVE EXPANSION OF BOLT HOLES IN RAILROAD RAIL. VOLUME III - FIELD EXPERIMENT RESULTS

The bolt-hole cold-expansion process has been demonstrated by laboratory tests to significantly affect the initiation and propagation of fatigue cracks from rail bolt holes such that a reduction of the incidence of rail-bolt-hole failure in cold-expanded rail would be expected. A field-verification experiment was implemented in 1977 and reported in Volume I of this report. This volume contains the results of the field experiment, and examination of the effect of fatigue ratio (R) on the observed laboratory fatigue-life improvement of cold-expanded bolt holes, an investigation of crack growth of rails in a vacuum environment, and a comparison of the fatigue performance of cold-expanded bolt holes with rail flashwelds.

  • Record URL:
  • Supplemental Notes:
    • See also RRIS 01 314087; Bulletin 8002. Also available in set of 3 reports PC E09, PB80-182173.
  • Corporate Authors:

    Boeing Commercial Airplane Company

    P.O. Box 3707
    Seattle, WA  United States  98124

    Transportation Systems Center

    55 Broadway, Kendall Square
    Cambridge, MA  United States  02142

    Federal Railroad Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Lindh, D V
    • Taylor, R Q
    • Rose, D M
  • Publication Date: 1980-2

Media Info

  • Pagination: 111 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00314090
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FRA/ORD-80/5.III Final Rpt., DOT-TSC-FRA-80-5-III
  • Contract Numbers: DOT-TSC-1048-3
  • Files: NTIS, TRIS, USDOT
  • Created Date: Aug 5 1980 12:00AM