This content is not included in your SAE MOBILUS subscription, or you are not logged in.
The Problem of Interpretation of Tire Skid Test Results - The Interaction of Variations in Speed, Water Depth, and Surface with Tire Coefficients
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1973 by SAE International in United States
Annotation ability available
This paper explores some methods for circumventing the difficulties in interpretation of skid and traction tests caused by variations in speed, water depth, and road surface.
Testing data are analyzed with a new approach using a graph of peak coefficient against slide coefficient. These analyses show that the tire and surface do not change greatly in basic frictional response as test speed changes. However, changes in coefficient do occur on most wet surfaces as the test speed is varied. Data indicate this to be the result of changes in the percentage of the tire penetrating the water film to reach the road surface.
Data obtained under nearly identical conditions on different days vary. Least variation occurs in the low-speed peak coefficients, the slide coefficients, and the sum of these coefficients obtained either on dry surfaces or on surfaces wet with very thin water films.
The vector line recording the change of the wet peak and slide coefficients as they vary with speed is useful in determining the quantity of water depth actually present on a surface.
Methods of using these data are suggested which reduce the testing variation under all conditions, help to characterize surfaces, adjust data for day-to-day test variation in water depth, and interpret the data in a more meaningful manner.
|Technical Paper||Evaluation of Various Passenger Tire Constructions for Wet Traction Performance|
|Technical Paper||Passenger-Car Cornering and Braking Tests on Wet Pavements|
|Technical Paper||Factors Affecting Tire Traction|
CitationKienle, R., "The Problem of Interpretation of Tire Skid Test Results - The Interaction of Variations in Speed, Water Depth, and Surface with Tire Coefficients," SAE Technical Paper 730281, 1973, https://doi.org/10.4271/730281.
- Lowne R. W. “The Effect of Road Surface Texture on Tire Wear.” Rubber Chem. Tech. 44 1971 1159
- Allbert B. J. Walker J. C. “Tire to Wet Road Friction at High Speeds.” Rubber Chem. Tech. 41 1968 735
- Maycock G. “Skid Resistance of Passenger Car Tires on Wet Surfaces.” Rubber Chem. Tech. 41 1968 780
- Schallamach A. “Recent Advances in Knowledge of Rubber Friction and Tire Wear.” Rubber Chem. Tech. 41 1968 209
- Ludema K. C. Gujrati B. “An Analysis of the Literature on Tire-Road Skid Resistance.” ASTM Report (E-17 Committee)
- Horne W. B. “Tire Hydroplaning and its Effects on Tire Traction.” Highway Research Record 214 1968 24
- Kummer H. W. Meyer W. E. “Tentative Skid Resistance Requirements for Main Rural Highways.” National Cooperative Highway Research Program Report 37 1967