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Innovative Material Characterisation Methodology for Tyre Static and Dynamic Analyses
ISSN: 0148-7191, e-ISSN: 2688-3627
To be published on September 30, 2020 by SAE International in United States
Event: 11th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference
Tyre structures are based on composite materials that constitute numerous layers, each providing specific properties to the tyre mechanic and dynamic behaviour. In principle, the understanding of the partial contributions of the individual layers requires knowledge of its mechanical properties. In case of non-availability of such critical information, it is difficult to perform tyre FE analyses. In the current work, a methodology is proposed to study the tyre static and dynamic behaviour to estimate its constituents properties based on the measured quasi-static responses of the tyre for certain specific loads. As a first step, a simplified tyre numerical model with standard rubber material properties is modeled that can substantively predict the necessary tyre static responses, i.e. radial, longitudinal and lateral stiffness. These responses are correlated with the physical tyre response that are measured using a kinematic and compliance (K&C) test rig in the laboratory. A Design of Experiments (DoE) study, followed by an optimization process, is performed by sampling the material properties of the rubbers to simulate the FE model and match the tyre responses accurately. As a final step, the contribution of tyre individual constituent rubber material properties over the tyre modal behavior is analysed. The DoE study provides an insight into the influence of the constitutive components on the tyre overall behaviour in a wide frequency band and the optimization technique promises the prediction of the tyre material properties with considerable accuracy. This work fulfills two main challenges: Firstly, to allow building an FE tyre model with minimum possible material information and secondly, to offer an insight into the influence of the various tyre constituent parts over the tyre static and dynamic response