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Rapport (Rapport De Recherche) Année : 2019

Rolling resistance modelling

Résumé

In this study, a rolling contact model is proposed for quantifying the part of rolling resistance originating from hysteretic energy dissipation at the interface between a viscoelastic solid and a rigid surface. A viscoelastic half-space assumption is made and a 3D time dependent algorithm is used to solve the problem. This approach is validated for a viscoelastic sphere rolling on a rigid flat surface and agrees with previous results of the literature. Then the model is applied to the NBR solid wheel implemented on a small-scaled test rig developed for the experimental evaluation of rolling resistance by Roskilde University. Contact calculations are firstly performed in static conditions and show that contact stiffness increases with surface roughness. Then rolling of the wheel on a perfectly flat surface and two rough sandpapers is considered. On the flat surface the steady-state contact pressure distribution is asymmetric along the rolling direction due to viscoelasticity. It is observed that steady-state rolling resistance coefficient increases with the total load and with the rolling speed. Regarding rolling on sandpapers, the averaged rolling resistance coefficient increases with surface roughness, especially at higher speeds. Taken as a whole, these numerical results are similar to experimental trends observed with the test rig, but further investigations should be made on the input data to improve the comparisons.
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Dates et versions

hal-03134331 , version 1 (08-02-2021)

Identifiants

  • HAL Id : hal-03134331 , version 1

Citer

Julien Cesbron. Rolling resistance modelling. [Research Report] IFSTTAR - Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux. 2019, 42 p. ⟨hal-03134331⟩
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