METHOD AND EQUIPMENT FOR CONTINUOUS MEASURING OF THE COEFFICIENT OF FRICTION AT INCIPIENT SKID

THE COEFFICIENTS OF FRICTION WERE EXPERIMENTALLY DETERMINED FOR RUBBER TIRES ON ROAD SURFACES IN RELATION TO SLIP WHEN A WHEEL IS BRAKED. THE METHOD AND EQUIPMENT ARE DESCRIBED. THE SLIP CAN BE VARIED FROM 0 TO 50 PERCENT. WHEN MEASURING WITH THIS METHOD, NO BRAKE IS USED. THE TEST WHEEL IS CONNECTED TO THE DRIVING WHEELS OF A TRUCK BY MEANS OF TRANSMISSION UNITS. A VARIABLE TRANSMISSION MAKES IT POSSIBLE TO CHANGE CONTINUOUSLY THE GEAR RATIO BETWEEN THE TEST WHEEL AND THE DRIVING WHEELS. THUS IT IS POSSIBLE TO MEASURE THE COEFFICIENT OF FRICTION CONTINUOUSLY ON LONGER DISTANCES ALONG THE ROAD. THE DIFFERENCES BETWEEN THE COEFFICIENT OF FRICTION AT INCIPIENT SKID AND AT LOCKED WHEEL IS DISCUSSED. EXPERIMENTAL RESULTS ARE PRESENTED. THIS METHOD IS ALSO USED TO MEASURE THE BEHAVIOR OF WINTER TIRES. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrbbulletin/348/348-002.pdf
• Supplemental Notes:
  • Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Kullberg, Gosta
• Conference:
  • 41st Annual Meeting of the Highway Research Board
  • Location: Washington DC, United States
  • Date: 1962-1-8 to 1962-1-12
• Publication Date: 1962

Media Info

• Media Type: Digital/other
• Features: Figures;
• Pagination: pp 18-35
• Monograph Title: Skidding measurement techniques: 1962 developments
• Serial:
  • Highway Research Board Bulletin
  • Issue Number: 348
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Braking; Canal lock operations; Coefficient of friction; Gears; Measurement; Pavements; Skidding; Surface course (Pavements); Testing; Texture; Tires; Transmissions; Wheels
• Uncontrolled Terms: Slippage
• Subject Areas: Highways; Pavements; Vehicles and Equipment;

Filing Info

• Accession Number: 00206751
• Record Type: Publication
• Files: TRIS, TRB, ATRI
• Created Date: Jul 15 1994 12:00AM