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Mécanique du contact aux échelles mésoscopiques

Abstract : Two experimental methods have been developed to measure, for an elastomer / glass multi-contact interface, the mechanical fields inside the volume (MEMS force micro-sensor embedded under the elastic film) and at the interface (transmitted light contact imaging), at length scales intermediate between the apparent contact one and the micro-contacts one.
The MEMS measurement has allowed us to obtain the stress fields under normal load and in steady sliding regime, with a very good agreement with simple mechanical models. For periodically rough substrates the relation between the stress spectrum and the surface topography has been interpreted in terms of spectral filtering, relevant to understanding tactile perception.
The optical measurement has allowed us, by analysing the spatial distribution of the intensity, to obtain the interfacial pressure field. Its dependence with the rough layer properties has been confronted to the Greenwood-Tripp model. By tracking the asperities, the displacement field has been measured with a sub-micronic resolution and has shown the coexistence of slipping and sticking zones predicted by Cattaneo and Mindlin.
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https://tel.archives-ouvertes.fr/tel-00172935
Contributor : Julien Scheibert <>
Submitted on : Tuesday, September 18, 2007 - 2:45:39 PM
Last modification on : Tuesday, December 8, 2020 - 3:40:56 AM
Long-term archiving on: : Thursday, April 8, 2010 - 9:58:18 PM

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  • HAL Id : tel-00172935, version 1

Citation

Julien Scheibert. Mécanique du contact aux échelles mésoscopiques. Analyse de données, Statistiques et Probabilités [physics.data-an]. Université Pierre et Marie Curie - Paris VI, 2007. Français. ⟨tel-00172935⟩

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