KALKER'S 'EXACT' NONLINEAR CREEP THEORY

The conversion of the computer program, A Programme for Three-Dimensional Steady State Rolling developed by Professor J. J. Kalker, from the original Algol language to Fortran is considered. This program determines the resultant creep forces and moment for steady state rolling of two bodies of equal or unequal linearly elastic material properties. A related manual for Kalker's 'Simplified Theory of Rolling Contact' is considered in the report User's Manual for Kalker's Simplified Nonlinear Creep Theory, by James G. Goree and E. Harry Law, FRA/ORD-78/06 Contract DOT-OS-40018, December, 1977. The program considered in the present report concerns the same problem except for the extension to unequal materials. It is found that, for equal materials, the Simplified Theory gives approximately the same results as the exact solution in most cases and in those instances where some difference was noted, the simplified theory appears to be in better agreement with experimental results. In addition, the simplified theory reduces the computation time by a factor of approximately 50 to 100...Software Description: The Program is written in the Fortran IV programming language for implementation on a IBM system 370 G1 Compiler using the HASP operating system. 448K bytes of core storage are required to operate the model.

  • Supplemental Notes:
    • Source tape is in EBCDIC character set. Tapes can be prepared in most standard 7 or 9 track recording modes for one-half inch tape. Identify recording mode desired by specifying character set, track, density, and parity. Call NTIS Computer Products if you have questions. Price includes documentation, PB-279 503. Also available as punched cards.
  • Corporate Authors:

    Federal Railroad Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Authors:
    • Goree, J G
    • Law, E H
  • Publication Date: 1978-8

Media Info

  • Pagination: n.p.

Subject/Index Terms

Filing Info

  • Accession Number: 00199105
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: DOT/DF-78/004
  • Files: NTIS, USDOT
  • Created Date: Dec 19 2002 12:00AM