Development and analysis of the two-regime transient tyre model for combined slip

This paper refines the two-regime transient theory developed by Romano et al. [Romano L, Bruzelius F, Jacobson B. Unsteady-state brush theory. Vehicle Syst Dyn. 2020;59:11–29. DOI: 10.1080/00423114.2020.1774625.] to include effect of combined slip. A nonlinear system is derived that describes non-steady generation tyre forces and considers coupling between longitudinal lateral characteristics. The proposed formulation accounts for both carcass bristle dynamics, represents a generalisation single contact point models. formal analysis conducted investigate anisotropy on properties system. It concluded fundamental role played ratio relaxation lengths. In particular, it demonstrated maximum slip guarantees (partial) adhesion conditions does not coincide with stationary value decreases considerably highly anisotropic tyres. dissipative nature model also analysed using elementary tools borrowed from classic systems. comparison performed against models, showing good agreement especially towards full-nonlinear one. Furthermore, compared appears be able better replicate exact dynamics predicted complete Finally, partially validated experimental results.