Experimental evidence of non-Amontons behaviour at a multi-contact interface

We report on normal stress field measurements at the multicontact interface between a rough elastomeric film and a smooth glass sphere under normal load, using an original MEMS-based stress-sensing device. These measurements are compared to Finite-Elements Method (FEM) calculations with boundary con...

Full description

Saved in:
Bibliographic Details
Published in:Europhysics letters 2008-08, Vol.83 (3), p.34003-34003(6)
Main Authors: Scheibert, J, Prevost, A, Frelat, J, Rey, P, Debrégeas, G
Format: Article
Language:English
Subjects:
46.55.+d
81.40.Pq
85.85.+j
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report on normal stress field measurements at the multicontact interface between a rough elastomeric film and a smooth glass sphere under normal load, using an original MEMS-based stress-sensing device. These measurements are compared to Finite-Elements Method (FEM) calculations with boundary conditions obeying locally Amontons' rigid-plastic-like friction law with a uniform friction coefficient. In dry contact conditions, significant deviations are observed which decrease with increasing load. In lubricated conditions, the measured profile recovers almost perfectly the predicted profile. These results are interpreted as a consequence of the finite compliance of the multicontact interface, a mechanism which is not taken into account in Amontons' law.
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/83/34003