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An Investigation of the Variation of Contact Area with Inflation Pressure

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Millar, Phillip, Woodward, David, Friel, Shaun and Woodside, Alan (2011) An Investigation of the Variation of Contact Area with Inflation Pressure. In: 5th International Conference Bituminous Mixtures and Pavements, Thessaloniki, Greece. Unknown. 9 pp. [Conference contribution]

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Abstract

This paper investigates the relationship between contact area phenomena and tyre inflation pressure. It aims to show that the engineering performance of a highway surface is not related merely to contact area but also to how contact pressure is distributed within this area. The assumption of an elliptical contact patch is simplistic. The examples shown in this paper illustrate that a surfacing material may be exposed to much greater stressing than previously assumed. This may lead to significant impairment of its performance with medium to long term implications for maintenance and repair. An introductory background to the modelling of interfacial contact patch stress is given. Two examples of how contact patch data can be measured are given. Both procedures use XSensor™ pressure mapping technology. The first deals with dynamic measurement of asphalt surfaces. The second example considers a simple static load on an ideal smooth surface to assess the effect of increasing tyre inflation pressure. Both examples show significant divergence from the assumed ellipsoid contact patch shape and uniform stressing distribution.

Item Type:Conference contribution (Paper)
Faculties and Schools:Faculty of Art, Design and the Built Environment
Faculty of Art, Design and the Built Environment > School of the Built Environment
Research Institutes and Groups:Built Environment Research Institute
Built Environment Research Institute > Centre for Sustainable Technologies (CST)
ID Code:19691
Deposited By:Dr David Woodward
Deposited On:18 Aug 2011 15:04
Last Modified:23 Aug 2011 15:03

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