A Parametric Study of Frictional Resistance to Vehicular Rotation Resulting from a Motor Vehicle Impact

The determination of the effective rotational coefficient of friction between the tires and the roadway are integral to the calculation of the stopping torque on a vehicle. This paper seeks to determine the factors which affect the rotational coefficient of friction and to determine a baseline rotational coefficient of friction. A derivation of the postimpact equations of motion and the kinematics of vehicles in rotation are examined. The resultant parameters of motion that affect the rotational coefficient of friction are presented. The effects of these various parameters on the rotational coefficient of friction were studied using the EDSMAC simulation model. Normalized coefficients, which can be multiplied by the roadway friction to obtain the rotational coefficient of friction under common accident scenarios are presented in graphical form for use by accident reconstuctionists. Findings indicate that the use of equations of rotational motion can supplement linear momentum equations in a momentum analysis, but they are not a substitute for other accident reconstruction techniques or the sound judgment of the accident reconstructionist.

  • Availability:
  • Supplemental Notes:
    • Paper No. 2005-01-1203
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Keifer, Orion P
    • Reckamp, Bradley C
    • Heilmann, Thomas C
    • Layson, Peter D
  • Publication Date: 2005-4


  • English

Media Info

  • Media Type: Print
  • Features: Appendices; Figures; References;
  • Pagination: pp 225-243
  • Monograph Title: Accident Reconstruction 2005

Subject/Index Terms

Filing Info

  • Accession Number: 01005789
  • Record Type: Publication
  • ISBN: 0768015758
  • Files: TRIS
  • Created Date: Oct 5 2005 10:23PM