Other Reports

Estimation of Elastic and Residual Stresses in Railroad Rails Subject to Service Loading

  • 01
  • Nov
  • 1996
AUTHOR: Transportation Systems Center
SUBJECT: Rail and Infrastructure Integrity
KEYWORDS: Contact Stress, Mathematical Model, Rail Transportation
ABSTRACT: The subject of this report is the analysis of elastic and residual stresses in railroad rails working in service conditions. The report consists of two parts. The first part (section 2) covers the development of an elastic model for the analysis of contact stresses in railroad rails. The main goal of the work was to develop a reliable method of analysis of such stresses in rails subject to both normal and tangent surface tractions. The second part of the report deals with the modification of the existing software for the evaluation of residual stresses in railroad rails subject to cyclic loads. Significant changes have been made with regard to the types of loads that can be considered. A new finite element has been formulated and the program flow logic has been expanded so that not only normal but also tangent surface traction can be considered. Additionally, a new algorithm that allows the inclusion of thermal loads has been implemented in the computer programs. The mechanical and numerical models, the computer programs, and their validation are described in section 3 of this report