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30th Annual Meeting & Conference on Tire Science & Technology Akron/Fairlawn Hilton Hotel: Akron, OH, USA
Wednesday, September 14, 2011: 10:10 AM
Akron/Summit Ballroom (Akron/Fairlawn Hilton Hotel)
Tire heating is caused by hysteresis effects due to the deformation of tire rubber during operation, and frictional heating due to the friction between the tire and the road surface. Tire temperatures can depend on many factors, including tire geometry, inflation pressure, vehicle load and speed, road type and temperature and environmental conditions. In this paper, a thermal-mechanical finite element analysis (FEA) is presented in order to predict the stress/strain and temperature distribution in static and rolling tires. The proposed approach has three analysis modules: deformation, dissipation, and thermal modules. Each module solves a particular aspect of the analysis. The deformation module performs a finite element stress analysis to determine the strain and stress distributions within the tire for different vehicle weight, speed, inflation pressure and road friction. In the dissipation module, the heat source is calculated from the strain distribution and the hysteresis of the material. In the thermal module, the heat transfer analysis is done with a 2D steady state model including the hysteresis heat generation obtained from the dissipation module, and the thermal boundary conditions. The calculated footprint pressures, strain energy density, and the steady-state temperature distributions in the tire key areas are obtained, and compared with experimental data available in the literature.
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