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Non–Amontons-Coulomb local friction law of randomly rough contact interfaces with rubber.
- Source :
- Europhysics Letters; Dec2013, Vol. 104 Issue 6, p64001-64006, 6p
- Publication Year :
- 2013
-
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 . 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02955075
- Volume :
- 104
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Europhysics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 94294755
- Full Text :
- https://doi.org/10.1209/0295-5075/104/64001