FATIGUE ANALYSIS OF RAIL SUBJECT TO TRAFFIC AND TEMPERATURE LOADING

This report utilizes a fatigue analysis methodology in the prediction of rail service life. The occurrence of transverse rail defects under longitudinal rail stresses is particularly addressed. This methodology, which has been successfully applied to various types of structures subject to complex load spectra, uses a three dimensional characterization of the load environment in conjunction with material properties, presented in the form of Modified Goodman Diagrams. The fatigue analysis, which is based on linear cumulative damage theory, utilizes the three dimensional stress spectra obtained by combining the contact, bending and temperature stresses, to predict the occurrence of transverse defects in the rail head. This analysis is performed for several different rail sections, of similar metallurgy, to show the effect that rail section has on fatigue life. This predicted fatigue life is then compared to defect occurrence data obtained from U.S. mainline service.

Media Info

  • Features: References;
  • Pagination: 40 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00188118
  • Record Type: Publication
  • Source Agency: Association of American Railroads Technical Center
  • Report/Paper Numbers: AAR Rpt R-315
  • Files: TRIS
  • Created Date: Feb 27 1979 12:00AM