Norsemeter Friction AS







 

Home

 

Products

 

Technology

 

  • Introduction


  •  

  • Tech Reports


  •  

    Downloads

     

    Company




    Friction Curve


    Technical Reports

    Methods and Instruments for On-Board Measurement of Tyre/Road-Friction

    Writers:

    Bert Breuer, Ph.D, Director, Thomas Bachmann, M.Sc, Darmstad University of Technology, Jørg Støcher, Stephan Erneati

    Published by:

    Motor Sports Engineering Conference - Dec. 1994, SAE International, Dearborn, Michigan, USA

    Conclusion:

    The peak occurs at values as high as 31% slip ratio.

    Viscous/dynamic hydroplanning theory and friction tester correlation technique

    Writers:

    Walter B. Horne

    Published by:

    NASA, Technical Publication, 1993

    Conclusion:

    The peak friction of a rolling breaked tyre occure at variable percent slip ratios

    A Method for Rating the skid Resistance and Micro/macrotexture Characteristica of Wet Pavements

    Writers:

    F. Buhlman, Walter B. Horne

    Published by:

    NASA TN D-1376

    Conclusion:

    The percent slip at which the peak friction occurs is dependent on the macro and micro texture of the pavement

    Frictional Interaction of Tire and Pavement

    Writers:

    W.E. Meyer & J.D. Walter

    Published by:

    ASTM Spec. Tech. Publ. 793

    Conclusion:

    The peak friction developed by a breaked tyre on pavement will occur at different slip ratios depending on pavement, environment and tire properties

    Unified Theory of Rubber and Tire Friction

    Writers:

    Hartwig W. Kummer

    Published by:

    Pennstate Automotive Research program Rep. S 71B

    Conclusion:

    This Publication, is a fundamental scientific research paper showing that the peak friction occurs at variable percent slip ratios, depending on several factors

    Fixed slip friction measurement as a means of winter road maintenance monitoring in Sweden

    Writers:

    Olle Nordstrøm

    Published by:

    Swedish Road and Transport Research Institute, Linkøping, Sweden

    Conclusion:

    The peak friction can be even at 100% slip, and that it is usually between 5 - 25%

    Anti-Lock Braking systems

    Published by:

    SAE Book - PT-29

    Conclusion:

    "Maximum retarding for force friction occurs between 5-25% slip". See also: figure of µ-slip curve

    Evaluation of Ground Friction Measuring Equipment under Runway Winter Conditions

    Published by:

    Transport Canada Report AKPE 5152-20-7

    Conclusion:

    That on winter contaminated runways µ-peak can occur at 40-50% slip and value differences between friction measured at 18% slip and the peak can be 40-60%