U.S. flag An official website of the United States government.
Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

i

Estimation of the fatigue life of railroad joint bars

File Language:
English


Details

  • Creators:
    Talamini, Brandon ; Jeong, David Y. ; Gordon, Jeff
  • Corporate Creators:
    John A. Volpe National Transportation Systems Center (U.S.)
  • Subject/TRT Terms:
  • Publication/ Report Number:
    JRCICE2007-40065
  • Resource Type:
    Proceedings
  • Geographical Coverage:
    United States
  • Corporate Publisher:
    United States. Department of Transportation. Federal Railroad Administration
  • Abstract:
    This paper investigates the influence of physical track conditions in the vicinity of a rail joint on the fatigue life of the joint bars. Recent derailments due to broken joint bars, such as the Minot, ND accident in January 2002, have highlighted the need for better understanding of the effects of joint conditions on premature joint bar failure. Fatigue life estimates can be used to guide the selection of inspection intervals for joint bars in service. ; Engineering approximations are used to infer the dynamic load factor at a rail joint due to joint characteristics including: ; • rail end gap ; • joint efficiency (looseness) ; • track stiffness (vertical foundation modulus) ; A three-dimensional finite element analysis of a rail joint is conducted and the dynamic load is applied to develop an estimate of the live (bending) stresses at the joint due to passing wheels. These stresses are then used to estimate the fatigue life of the joint bars. ; The methodology is demonstrated for 132RE rail with companion joint bars. The effect of thermal expansion (or the temperature difference below the rail neutral temperature) is investigated. Typical wheel loads and railcar speeds are considered and results are presented for a baseline a joint condition.
  • Format:
    PDF
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/8986/dot_8986_DS1.pdf
  • File Type:
    Filetype[PDF - 680.08 KB]
  • Collection(s):
    Volpe Center ; Federal Railroad Administration
  • Main Document Checksum:
    urn:sha-512:64b949dba120efecb4356537dc52374d248d48cbfd1ccdd905a03112c6f3584c91736f5d0a2b8095f0fbde31dd547ce252016ba5f667ae10c7ee617a025f4335
PREVIOUS
File Language:
English
ON THIS PAGE
Details
 Found an issue?
Send us an email at:
publishinghd@cdc.gov
ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.
BACK TO TOP