USERS' MANUAL FOR KALKER'S SIMPLIFIED NONLINEAR CREEP THEORY

The conversion of the computer program, 'Simplified Theory of Rolling Contact,' (used for calculation of a nonlinear creep force-creepage relationship) from the original Algol language to Fortran is considered. The Algol program was written by Professor J. J. Kalker and was derived from the paper, 'Simplified Theory of Rolling Contact,' Delft Progr. Rep., Series C: Mechanical and Aeronautical Engineering and Shipbuilding, 1 (1973), pp. 1-10. A significant number of changes was made in the program for more convenient use; however, the fundamental equations remain unchanged. The results were checked in detail to insure agreement with the original solution. The program gives an appropriate solution for the resultant tangential creep forces and spin moment acting between two bodies of equal linearly elastic material properties. The creep forces and spin moment are due to lateral, longitudinal, and spin creepages. Assumptions corresponding to the Hertz contact theory are implied and two additional simplifying assumptions are made, resulting in a significant reduction in computation time as contrasted with previous solutions. Two separate computer codes were developed, the first being the general solution with extended input and output, and the second a shortened version primarily intended for use as a subroutine. Surprisingly good agreement is found to exist between the 'Simplified Theory' and published experimental results for a wide range of contact ellipse eccentricity.

• Record URL:
  https://railroads.dot.gov/elibrary/users-manual-kalkers-simplified-nonlinear-creep-theory
• Supplemental Notes:
  • Prepared in cooperation with Arizona State Univ., Tempe. Dept. of Mechanical Engineering and Association of American Railroads, Chicago, Ill.
• Corporate Authors:

  Clemson University

  Department of Mechanical Engineering
  Clemson, SC  United States  29631

  Arizona State University, Tempe

  Department of Mechanical Engineering
  Tempe, AZ  United States  85281

  Association of American Railroads Research Center

  3140 South Federal Street
  Chicago, IL  United States  60616

  Federal Railroad Administration

  Office of Research and Development, 1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Goree, J G
  • Law, E H
• Publication Date: 1977-12

Media Info

• Media Type: Digital/other
• Pagination: 58 p.

Subject/Index Terms

• TRT Terms: Adhesion; Car wheels (Railroads); Computer programs; Creep; Creep properties; Dynamic loads; Dynamic tests; Force; Live loads; Nonlinear systems; Rail (Railroads); Railroad tracks; Rolling contact; Train track dynamics; Wheels
• Identifier Terms: FORTRAN (Computer program language)
• Uncontrolled Terms: Dynamic analysis; Dynamic response; Lateral dynamics
• Old TRIS Terms: Wheel creep
• Subject Areas: Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00176025
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: FRA/ORD-78/06
• Contract Numbers: DOT-OS-40018
• Files: NTIS, TRIS, USDOT
• Created Date: Jul 19 1978 12:00AM