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Non Amontons-Coulomb local friction law of randomly rough contact interfaces with rubber

Abstract : We report on measurements of the local friction law at a multi-contact interface formed between a smooth rubber and statistically rough glass lenses, under steady-state friction. Using contact imaging, surface displacements are measured, and inverted to extract both distributions of frictional shear stress and contact pressure with a spatial resolution of about 10 mu m. For a glass surface whose topography is self-affine with a Gaussian height asperity distribution, the local frictional shear stress is found to vary sub-linearly with the local contact pressure over the whole investigated pressure range. Such sub-linear behavior is also evidenced for a surface with a non-Gaussian height asperity distribution, demonstrating that, for such multi-contact interfaces, Amontons-Coulomb's friction law does not prevail at the local scale
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https://hal.sorbonne-universite.fr/hal-01537708
Contributor : Bruno Publis_simm <>
Submitted on : Monday, June 12, 2017 - 6:31:47 PM
Last modification on : Tuesday, October 6, 2020 - 2:58:02 PM

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Danh Toan Nguyen, Elie Wandersman, Alexis Prevost, Yohan Le Chenadec, Christian Frétigny, et al.. Non Amontons-Coulomb local friction law of randomly rough contact interfaces with rubber. EPL - Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2013, 104 (6), pp.64001 ⟨10.1209/0295-5075/104/64001⟩. ⟨hal-01537708⟩

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