The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

Study of Friction and Creep Between Steel Wheels and Rail

Author(s): Sciammarella, C., M. Press, S. Kumar, B. Seth, L. Nailescu and S. Kalpakjian
Corporate Author: Illinois Institute of Technology, Department of Mechanics, Mechanical and Aerospace Engineering
Corporate Report Number: IIT TRANS-76-2
Date of Publication: 1976-03
Pages: 101
Contract: DOT-OS-40103

A systematic experimental, parametric and similitude investigation of the friction and creep behavior of a steel wheel rolling on a steel rail is given. Laboratory investigation was performed on the 1/5th scale experimental GM-IIT Wheel rail Simulation testing Facility reported on earlier. Investigation of the size and area of contact between the two wheels at different stages of surface wear shows that the initially elliptical (near Hertzian) area of contact changes fast into a near rectangular shape with a several-fold increase, depending on the load and the duration of testing and wear. It was found that Kalkers Theory fits the nondimensionalized data well, when wheel surfaces are near perfectly smooth. The product of actual contact area and creep is always constant for a given normal load and friction coefficient regardless of the surface roughness and wear time (~ 5hrs.). This constancy law was derived on the basis of experimental data. It has been shown here that for the elastic and smooth surfaces the Carter-Poritsky theory also predicts the product of creep and theoretical area of contact as constant for a given load and operating friction coefficient. Generalized expressions for the interrelationship of friction coefficient, creep, actual area of contact, normal load and shear modulus have been established on the basis of experimental data. Recommendations for future design improvements have been made on the basis of these relations.

This report has yet to be scanned by Contrails staff

Request scanning of this report

Other options for obtaining this report

Via the Defense Technical Information Center (DTIC):
Via National Technical Information Service:
This report may have been digitized and made freely available for public download, or made publicly available for purchase by the National Technical Information Service through their online database, the National Technical Reports Library

Indications of Public Availability
No digitial image of an index entry indicating public availability is currently available
There has been no verification of an indication of public availability from an inside cover statement