Our theories for rolling contact are provided in different forms.

The free stand-alone CONTACT program

The stand-alone program works on the basis of a textual input-file. A basic GUI is provided for operating the program. The results are inspected mostly in MATLAB®.

Although the usage is inconvenient at times, this version provides the main functionalities in a well-structured way.

The stand-alone CONTACT program for wheel/rail contact

The extensions of CONTACT for wheel/rail contact analysis are provided on a commercial basis, using a licensing mechanism.

  • The premium version of CONTACT automates the processing of wheel and rail profiles: locating the regions where contact occurs, defining the local coordinates, and generating the undeformed distance function.

This w/r CONTACT program considers the full, non-Hertzian geometry, including yaw, in a fully generic way.

The CONTACT library

The CONTACT library provides access to CONTACT's computational core for other softwares. Practically all functionality is accessible through a well-defined interface.

Of these libraries, only the MATLAB version provides full transient calculations (for corrugation studies) and the Extended CONTACT features. It does require programming skills for its use.

USETAB and other CONTACT tables

Creep-force tables allow advanced theories to be used in vehicle dynamic simulation, where many millions of cases must be computed.

  • USETAB 1.2 is an improved version of Kalker's USETAB program, providing a table of 100.000 results and a corresponding interpolation routine.

  • An improved table was computed for VAMPIRE® in 2005. Today, we offer additional tables on the basis of the Extended CONTACT theory.
There are many ideas for creating more advanced tables, especially for non-Hertzian circumstances.

The algorithms FASTSIM and FASTSIM2

Despite its drawbacks, FASTSIM is still the method of choice for many rail vehicle simulation packages. It is fast and able to deal with non-Hertzian circumstances.