The simulation of in-plane tyre modal behaviour: a broad modal range comparison between analytical and discretised modelling approaches

The tire lateral force is essential to the vehicle handling and stability under cornering. However, it is difficult for engineers to get the tire lateral force under high loading condition due to the limitation of loading ability for most tire test machine in the world. The widely used semi-empirical tire lateral force models are obtained by curve-fitting experiments data and thus unable to predict the load dependent lateral force. The objective of this paper is to predict the tire lateral force under high-load condition based on the low-load tire data.The nonlinear characteristics of the tire cornering stiffness with the load are greatly affected by the tire carcass compliance. In this paper, a theoretical tire lateral model was built by considering carcass complex deformation. Combined with the relationship between the half-length of the tire contact patch and the load, the non-linear characteristics of the tire cornering stiffness with load were obtained. So the tire lateral force in the linear range under high-load condition was captured. As for the nonlinear range, the tire lateral force under high-load condition was acquired by deriving an empirical friction model dependent on load and slip velocity. The low-load tire test data was used to estimate model parameters. The lateral force prediction accuracy was verified by the high-load tire test data.

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“…The tire carcass lateral translation deformation is (1) Where, K cy0 is the carcass lateral translation stiffness.…”

Section: Tire Carcass Modelmentioning

confidence: 99%

“…Tire performance is vital for the dynamic behavior of a vehicle, as tires represent the sole contact force generation interface between the vehicle and the road [1]. Researches about tire modeling have been developing for so many years through curve-fitting experiment data and theoretical deriving.…”

Section: Introductionmentioning

confidence: 99%

Research on Tire Lateral Force Prediction under High-Load Condition

Chen

Guo

et al. 2015

SAE Technical Paper Series

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“…Eq. (34)-(37) are written with respect to degrees of freedom , , ′ and ′ , as opposed to using directly the radial eigenfunctions of the belt for = 1, see for example [31]. This approach results in more efficient handling of the purely longitudinal loads at the contact patch.…”

Section: Structural Modelmentioning

confidence: 99%

A thermo-frictional tyre model including the effect of flash temperature

Mavros

2018

Vehicle System Dynamics

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A thermo-frictional tyre model including the effect of flash temperature The version of record of this manuscript has been published and is available in Vehicle System Dynamics, 2018, http://www.tandfonline.com , A new tyre model is developed that can predict the influence of both macroscopic and local flash temperature on tyre force generation. The model comprises two heat-transfer solvers. A macroscopic solver calculates the 3D temperature distribution across the tread and sidewall at a resolution of a few millimetres. A separate flash-temperature solver calculates the local hot-spot temperature distribution at the macro-asperity tyre-road contact interface at a resolution of micrometres. The two heat-transfer solvers are coupled with a structural model for the calculation of tyre forces and the sliding speed distribution along the contact patch. The sliding speed distribution feeds into the flash temperature model and the local coefficient of friction is found as a function of sliding speed, flash temperature, normal pressure, road roughness and the complex modulus of rubber. The proposed tyre model is the first to include the effect of a changing macroscopic temperature distribution on the build-up of the local flash temperature and to account for road-tread conduction at the macro-asperity contact interface. The model is applicable for identifying the friction envelope and optimum temperature range for tyres on roads with a known roughness. This is important in motorsport where knowledge of grip offers a competitive advantage.A graphical representation of the modes of heat transfer is provided in fig. 1.

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“…These areas are continually being researched, refined and expanded upon to extend the understanding and responses of the models for modal and shear force generation which is paramount to determining the performance of the tyre. Brush models like the widely known Sharp model [21] to more recent accounts such as Tsotras and Mavros [22,23] show that the work continually expands and refines these models with ever increasing complexity due to the advancements in computation power which is available. Models which incorporate both scenarios start to significantly push the computational demands due to the increase in required elements such as beam or truss based elements.…”

Section: Tyre Testing and Modellingmentioning

confidence: 99%