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Tire
Published in Georg Rill, Abel Arrieta Castro, Road Vehicle Dynamics, 2020
Georg Rill, Abel Arrieta Castro
The resistance of a real tire against deformations has the effect that with increasing wheel load, the distribution of pressure over the contact patch becomes more and more uneven. The tread particles are deflected just as they are transported through the contact patch. The pressure peak in the front of the contact patch cannot be used, for these tread particles are far away from the adhesion limit because of their small deflection. In the rear part of the contact patch, the pressure drop leads to a reduction of the maximally transmittable friction force. With rising imperfection of the pressure distribution over the contact patch, the ability to transmit forces of friction between tire and road lessens. In practice, the tire characteristics are not just scaled by the wheel load as indicated in the simple approach in Sections 3.3.5 and 3.3.4 but they will also depend on it in a much more complicated way. In order to respect this fact in a tire model, the characteristic data for at least two wheel loads must be specified. Within TMeasy the payload FzN and its double 2FzN are used for this purpose.
Torsional moment representation in lateral load transfer equations
Published in Johannes Edelmann, Manfred Plöchl, Peter E. Pfeffer, Advanced Vehicle Control AVEC’16, 2017
A simulation software, CarSim, was used in order to compare Conv. Equation and Prop. Equation. During cornering, contact patch of the tires are subjected to lateral force. To simulate cornering behavior K&C test bed was used. Vehicle was placed on the K&C test bed and lateral force was applied. This procedure was used to eliminate other factors which might affect the LLT, such as steering mechanism and cornering drag.
An investigation towards intelligent tyres using finite element analysis
Published in International Journal of Pavement Engineering, 2020
Pooya Behroozinia, Seyedmeysam Khaleghian, Saied Taheri, Reza Mirzaeifar
It is worth mentioning that the tyre configuration affects the pavement performance since the contact patch area transmits the contact stress between the tyre and pavement (Wang et al. 2012). Additionally, the effect of tyre normal load and friction coefficient is shown in Figure 13. It can be noted that the tyre velocity does not influence the contact pressure distribution in the contact patch area. The contact patch length increases and the projected tyre surface on the pavement approximately becomes rectangular when the tyre normal load increases, as shown in Figure 13.
Surface temperature prediction of novel non-pneumatic mechanical elastic wheel based on theory analysis and experimental verification
Published in Numerical Heat Transfer, Part B: Fundamentals, 2018
Mingmin Zhu, Youqun Zhao, Zhen Xiao, Yaoji Deng
The ground contact patch of the tire is affected by tire structure, wheel alignment parameters, tire pressure, and vertical load. Due to the unique structure, the empirical equations, which are proposed to obtain the contact path for typical pneumatic, are not suitable for ME-Wheel. Thus, we investigated the contact characteristic of ME-Wheel to obtain the parameters of contact patch by conducting the load characteristic mechanical testing, which is domestically developed by our laboratory.