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Friction-Creep and Wear Studies for Steel Wheel and Rail.

PB264873

Publication Date	1975
Personal Author	Karamchandani, K. C.; Kumar, S.; Sciammarella, C. A.; Seth, B.; Nailescu, L.
Page Count	114
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. A friction-creep test facility 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. A preliminary study of the nature 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.
Keywords	Roadwheels Rolling friction Locomotives Railroad tracks Creep properties Wear Rolling contact loads Steels Test facilities Traction
Source Agency	Federal Railroad Administration Office of the Secretary
NTIS Subject Category	85I - Railroad Transportation
Corporate Authors	Illinois Inst. of Tech., Chicago. Dept. of Mechanics, Mechanical and Aerospace Engineering.; Federal Railroad Administration, Washington, D.C. Office of Research and; Association of American Railroads, Washington, D.C.; General Motors Corp., La Grange, Ill. Electro-Motive Div.
Supplemental Notes	Prepared in cooperation with Association of American Railroads, Washington, D.C., and General Motors Corp., La Grange, Ill. Electro-Motive Div.
Document Type	Technical Report
Title Note	Interim technical rept. no. 2.
NTIS Issue Number	197712
Contract Number	DOT-OS-40103

Friction-Creep and Wear Studies for Steel Wheel and Rail.

Friction-Creep and Wear Studies for Steel Wheel and Rail.
PB264873

Publication Date	1975
Personal Author	Karamchandani, K. C.; Kumar, S.; Sciammarella, C. A.; Seth, B.; Nailescu, L.
Page Count	114
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. A friction-creep test facility 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. A preliminary study of the nature 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.
Keywords	Roadwheels Rolling friction Locomotives Railroad tracks Creep properties Wear Rolling contact loads Steels Test facilities Traction
Source Agency	Federal Railroad Administration Office of the Secretary
NTIS Subject Category	85I - Railroad Transportation
Corporate Authors	Illinois Inst. of Tech., Chicago. Dept. of Mechanics, Mechanical and Aerospace Engineering.; Federal Railroad Administration, Washington, D.C. Office of Research and; Association of American Railroads, Washington, D.C.; General Motors Corp., La Grange, Ill. Electro-Motive Div.
Supplemental Notes	Prepared in cooperation with Association of American Railroads, Washington, D.C., and General Motors Corp., La Grange, Ill. Electro-Motive Div.
Document Type	Technical Report
Title Note	Interim technical rept. no. 2.
NTIS Issue Number	197712
Contract Number	DOT-OS-40103