Effects of age and wear on the stiffness and friction properties of an SUV tyre

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dc.contributor.author Wright, Kraig Richard Shipley
dc.contributor.author Botha, T.R. (Theunis)
dc.contributor.author Els, P.S. (Pieter Schalk)
dc.date.accessioned 2019-06-18T08:49:04Z
dc.date.issued 2019-08
dc.description.abstract Accurate tyre models are essential for all full vehicle simulation models. Tyre models are usually parameterised based on measurements on new tyres. This article performs a sensitivity analysis, based on experimental data, to determine the effects of age and wear on a 235/55R19 tyre’s stiffness characteristics as well as the effect of wear on the tyre’s longitudinal friction characteristics. A well-researched and documented method was used to artificially age the tyres. Static tests were performed periodically on the tyre to monitor the changes in stiffness characteristics. Tyres were also subjected to accelerated wear by performing repeated side force versus slip angle and longitudinal force versus slip tests on a coarse concrete surface. The results indicate that the vertical and longitudinal force versus displacement characteristics have small but convincing dependencies on the age and wear. While the aging process was a trustworthy method, the wear process created irregular lateral and circumferential wear which impacted results. Overall the effects of age and wear did not exhibit substantial enough influence on the tyre stiffness to merit a full tyre model update. However, the wear did have a significant effect, in the order of 10%, on the longitudinal friction of the tyre. en_ZA
dc.description.department Mechanical and Aeronautical Engineering en_ZA
dc.description.embargo 2020-08-01
dc.description.librarian hj2019 en_ZA
dc.description.uri http://www.elsevier.com/locate/jterra en_ZA
dc.identifier.citation Wright, K.R.S., Botha, T.R. & Els, P.S. 2019, 'Effects of age and wear on the stiffness and friction properties of an SUV tyre', Journal of Terramechanics, vol. 84, pp. 21-30. en_ZA
dc.identifier.issn 0022-4898 (print)
dc.identifier.issn 1879-1204 (online)
dc.identifier.other 10.1016/j.jterra.2019.04.001
dc.identifier.uri http://hdl.handle.net/2263/70225
dc.language.iso en en_ZA
dc.publisher Elsevier en_ZA
dc.rights © 2019 ISTVS. Published by Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Journal of Terramechanics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Journal of Terramechanics, vol. 84, pp. 21-30, 2019. doi : 10.1016/j.jterra.2019.04.001. en_ZA
dc.subject Tyre en_ZA
dc.subject Age en_ZA
dc.subject Modelling en_ZA
dc.subject Sensitivity analysis en_ZA
dc.subject Stiffness en_ZA
dc.subject Wear of materials en_ZA
dc.subject Concrete surface en_ZA
dc.subject Displacement characteristic en_ZA
dc.subject Friction characteristics en_ZA
dc.subject Friction properties en_ZA
dc.subject Longitudinal force en_ZA
dc.subject Vehicle simulation en_ZA
dc.subject Tires en_ZA
dc.title Effects of age and wear on the stiffness and friction properties of an SUV tyre en_ZA
dc.type Postprint Article en_ZA


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