Determining the Stresses in Steel Railroad-Track Rails Due To Freight Movements using Non-Contact Laser-Speckle

The proposed research is aimed at developing a procedure to determine the existing stresses in steel rails used in railroad tracks. These stresses are caused by the combination of both thermal restraint and physical/mechanical loads. However, since the track sections are installed at various temperatures and then continuously welded together and secured to wood or concrete ties, the stresses existing in the track at any given time are currently unknown. In fact, not only the magnitude of stress is unknown, but also the basic knowledge about whether the rails are in tension or compression a given time. Since the stresses due to thermal and physical loading are additive in the elastic range, the existing safety factors of the rail system when subjected to heavy freight movements is also an unknown. The proposed research will be aimed at extending the existing technology of laser-speckle strain measurements for concrete surfaces to use on steel rails.


  • English


  • Status: Completed
  • Contract Numbers:


  • Sponsor Organizations:

    Research and Innovative Technology Administration

    University Transportation Centers Program
    1200 New Jersey Avenue
    Washington, DC  United States  20590
  • Project Managers:

    Hossain, Mustaque

  • Performing Organizations:

    Kansas State University's Center for Transportation Research

    2118 Friedler Hall
    Manhattan, KS  United States  66506-5000
  • Principal Investigators:

    Peterman, Robert

  • Start Date: 20090701
  • Expected Completion Date: 0
  • Actual Completion Date: 20120331
  • Source Data: RiP Project 24477

Subject/Index Terms

Filing Info

  • Accession Number: 01481851
  • Record Type: Research project
  • Source Agency: Mid-America Transportation Center
  • Contract Numbers: DTRT07-G-0007
  • Files: UTC, RiP
  • Created Date: May 22 2013 1:02AM