paper_2004_VSD.pdf (157.02 kB)
Investigation of steady-state tyre force and moment generation under combined longitudinal and lateral slip conditions
journal contribution
posted on 2014-06-05, 10:18 authored by Georgios MavrosGeorgios Mavros, Homer Rahnejat, Paul KingPaul KingThe paper provides an insight into the contact mechanical behaviour of pneumatic tyres in a wide range of
steady-state operating conditions. Tyre forces and self-aligning moment generation during steady-state
manoeuvres are studied in some depth. For this purpose, two different versions of a dynamic model of a tyre
are developed. The simplest version consists of a one-dimensional series of bristles distributed on the tyre
periphery. The bristles incorporate anisotropic stiffness and damping in the lateral and longitudinal
directions, while the distributed tread mass is also taken into account. The vertical pressure distribution
along the contact patch is assumed to be parabolic and the length of the contact area is assumed to be known
apriori. The friction forces developed on the contact patch follow a stick-slip friction law.
The second version of the tyre model improves the potential of the simple model by introducing radial
and tangential stiffness and damping, as well as a Kelvin element for rubber behaviour in the simulation of
the impact on the leading edge of the contact area. The Kelvin model closely conforms to the semi-infinite
incompressible nature of rubber. The tyre models show effective reproduction of measured longitudinal and
lateral forces, as well as the self-aligning moment, under pure side-slip, pure longitudinal slip and
combined slip situations. The generated curves show qualitative concordance with the results obtained
experimentally, or by semi-empirical models such as the Pacejka’s Magic Formula. In addition, the tyre
models seem to be capable of reproducing the generated contact pressure profiles and the shape of the
observed variations in tyre forces between side-slipping, braking and traction diagrams. An investigation of
these three situations reveals the different mechanisms that result in the different shapes of the diagrams.
Finally, a study is carried out for tyre behaviour at very high speeds, which indicates deviations from the
results of traditional investigations.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering
Published in
DYNAMICS OF VEHICLES ON ROADS AND ON TRACKSPages
351 - 360 (10)Citation
KMAVROS, G., RAHNEJAT, H. and KING, P.D., 2004. Investigation of steady-state tyre force and moment generation under combined longitudinal and lateral slip conditions. IN: Abe, M. (ed.) Vehicle System Dynamics Supp 41. The Dynamics of Vehicles on Roads and on Tracks. Proceedings of the 18th IAVSD Symposium held in Kanagawa, Japan, 24 - 30 August, 2003, pp. 351 - 360.Publisher
© Taylor & Francis (Routledge)Version
- SMUR (Submitted Manuscript Under Review)
Publication date
2004Notes
Presented at The Dynamics of Vehicles on Roads and on Tracks, 18th IAVSD Symposium held in Kanagawa, Japan, 24 - 30 August, 2003.ISBN
9789026519727Language
- en