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Frottement des mousses : l'échelle mésoscopique du frottement

Abstract : Friction remains a challenging issue. The key reason for the limitations encountered by experimental physicists is a lack of information at short time/space scales, where most of the dissipation occurs, and which is believed to drive the macroscopic behaviour.This PhD project offers to unlock some of these points by means of a novel model system: elastomeric foams with cells and dangling struts at the foam interfaces. Indeed, our preliminary results indicate that elastomeric foams exhibit remarkable friction properties, mainly due to the entanglement of the cells. In steady state, a “Velcro-like” or hook and loop effect arises, continuously causing a dissipation which contributes to the friction force.From this, the objective is to link the statistics of the now-sizable pinning/depinning events across the sliding interface to the force fluctuations measured macroscopically. We will develop a physical description of the friction process.From the knowledge gained on the interplay between the texture of solid surfaces and macroscopic frictional behaviour, we will design new architectured materials with controlled frictional properties.
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https://pastel.archives-ouvertes.fr/tel-03229644
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Submitted on : Wednesday, May 19, 2021 - 10:18:08 AM
Last modification on : Thursday, May 26, 2022 - 3:52:20 AM
Long-term archiving on: : Friday, August 20, 2021 - 6:16:29 PM

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  • HAL Id : tel-03229644, version 1

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Cyprien Poirier. Frottement des mousses : l'échelle mésoscopique du frottement. Science des matériaux [cond-mat.mtrl-sci]. Université Paris sciences et lettres, 2021. Français. ⟨NNT : 2021UPSLS041⟩. ⟨tel-03229644⟩

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