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The Effect of Tire Break-In on Force and Moment Properties
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English
Abstract
A tire break-in procedure has historically been used prior to tire force and moment testing for three reasons: to reduce variability, stabilize the data, and simulate service. For low slip angle force and moment data it is shown that the tire break-in does not achieve these objectives.
Break-in is a result of viscoelastic changes and permanent deformation in the tire carcass materials, not a surface roughening or wear effect as has previously been assumed.
It is recommended that no break-in be used in low slip angle force and moment testing. This action would eliminate the break-in variable and lead to reduced testing variability and more stable data.
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Authors
Citation
Marshall, K., Phelps, R., Pottinger, M., and Pelz, W., "The Effect of Tire Break-In on Force and Moment Properties," SAE Technical Paper 770870, 1977, https://doi.org/10.4271/770870.Also In
References
- Pottinger M.G. et.al. “Effects of Test Speed and Surface Curvature on Cornering Properties of Tires” SAE 760029 Detroit, Michigan February 1976
- Phelps R.L. et.al. “The Mathematical Characteristics of Steady State Low Slip Angle Force and Moment Data” SAE 760031 Detroit, Michigan February 1976
- Ginn J.L. et.al. “The BFGoodrich Tire Dynamics Machine” SAE 490B Detroit, Michigan March 1962
- Gehman S.D. “Material Characteristics” Mechanics of Pneumatic Tires National Bureau of Standards Monograph 122 Clark S.K. November 1971
- Bueche F. Physical Properties of Polymers Interscience Publishers New York 1972