Title

Friction-Creep and Wear Studies for Steel & Wheel Rail

Creator

Karamchandani, K. C.

Kumar, S.

Sciammarella, C. A.

Seth, B.

Nailescu, L.

Kalpakjian, S.

Publisher

Chicago : Illinois Institute of Technology, Department of Mechanics and Mechanical and Aerospace Engineering

Date

1975

Identifier

PB264873

Abstract

Some basic aspects of the friction-creep phenomena in the rolling of a steel wheel on a rail are studied with a qualitative analysis of stress, strain, adhesion and creep in the contact zone and the stresses on the remaining surface of the rail and the wheel. Some pertinent literature on the subject is briefly discussed. The friction-creep test facility, developed by the GM-EMD and given to IIT for the project, was modified and improved to give more accurate friction-creep data. The electrical control and drive system was changed to give accurate speed of rotation and to dynamically brake the two wheels separately. Friction-creep data was taken with braking of both the small and the large wheels. The data obtained with small wheel braking showed higher coefficients of friction than that of the large wheel braking. Some preliminary reasons for the difference are qualitatively discussed. The maximum coefficient of friction for virgin steel on virgin steel was between 0.55 and 0.7 and creep up to 1.2% was observed. The friction creep data taken with water and oil contamination yielded maximum friction coefficient of 0.25, maximum creep of 3.4%, for water, and 0.06 and 22% respectively for oil. Non-dimensionalized tractive force and creep is plotted which can be used for similitude purposes. A preliminary study of the natur and progress of wear during rolling was done with two microscopes, installed for each wheel. With the help of a microswitch and flash gun, some qualitative observations were made on one spot on the wheel. Attempts are being made to study the nature and rate of wear quantitatively.

Date Issued

1975-05

Extent

103

Corporate Author

Illinois Institute of Technology, Department of Mechanics and Mechanical and Aerospace Engineering

Corporate Report Number

IIT-TRANS-75-1

Contract

DOT-OS-40103

NTRL Accession Number

PB264873

Access Rights

Document is available to the public through the National Technical Information Service

Photo Quality

Incomplete

Distribution Classification

1

DTIC Record Exists

No

Report Availability

Full text available by request

Provenance

S. Kumar

Type

report