A Discrete Tire Model for Cornering Properties Considering Rubber Friction

Abstract

In this paper, a discrete tire model of cornering properties for road vehicles relating to tire grip performance, which is important for driving stability and safety, is presented. The proposed tire model combines realistic rubber friction related to velocity and tire grip performance with deformation of the carcass. The model can describe the stress and strain of the carcass and tread, and the rubber friction coefficient at each point of the contact patch, which is affected by the distribution of the slip velocity. Meanwhile, the model incorporates the effects of the viscoelastic rubber material and power spectrum of the road, which are explicitly reflected in the rubber friction model. First, an improved rubber friction model based on the Persson theory of rubber friction is introduced in this paper. A discrete analytical tire model, which considers carcass compliance and the discretization of the tread, is then proposed. In addition, important phenomena of tire properties arising from the carcass compliance and rubber friction are analyzed and the effectiveness of the discrete analytical tire model is validated experimentally. The proposed model provides a new way to optimize the grip performance of a tire by adjusting the tire or rubber physical parameters even before the tire is made.

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Acknowledgements

This research is supported by National Natural Science Foundation of China (Grant Nos. 51875236 and 61790561) and China Automobile Industry Innovation and Development Joint Fund (Grant Nos. U1664257 and U1864206). We would like to gratefully acknowledge and thank the staffs in State Key Laboratory of Automotive Simulation and Control for their contribution to this study.

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Correspondence to Nan Xu.

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Xu, N., Yang, Y. & Guo, K. A Discrete Tire Model for Cornering Properties Considering Rubber Friction. Automot. Innov. 3, 133–146 (2020). https://doi.org/10.1007/s42154-020-00097-y

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Keywords

  • Road vehicle
  • Tire model
  • Grip performance
  • Rubber friction
  • Running velocity