Séminaire PMMH - Julien Scheibert (LTDS, EC Lyon)

  Version imprimable de cet article RSS
16 mai 11:00 » 12:00 — Salle réunion PMMH 1

Metainterfaces : how to design a rough contact that obeys a specific friction law ?

Many devices, including touchscreens and robotic hands, involve frictional contacts. Optimizing those devices requires fine control of the interface’s friction law. We lack systematic methods to create dry contact interfaces whose frictional behaviour satisfies preset specifications. In this seminar, I will present a generic surface design strategy to prepare dry rough interfaces that have predefined relationships between normal and friction forces [1]. Such metainterfaces circumvent the usual multiscale challenge of tribology [2], by considering simplified surface topographies as assemblies of spherical asperities. Optimizing the individual asperities’ heights enables specific friction laws to be targeted. Through various centimeter-scaled elastomer-glass metainterfaces, I will illustrate three types of achievable friction laws, including linear laws with a specified friction coefficient and unusual non-linear laws. This design strategy represents a scale- and material-independent, chemical-free pathway toward energy-saving and adaptable smart interfaces.

[1] A. Aymard, E. Delplanque, D. Dalmas, J. Scheibert, Designing metainterfaces with specified frition laws, Science, 383:200-204, 2024.

[2] A. I. Vakis, et al., Modeling and Simulation in Tribology Across Scales : an Overview, Tribol. Int., 125:169-199, 2018.





ÉCOLE SUPÉRIEURE DE PHYSIQUE ET DE CHIMIE INDUSTRIELLES DE LA VILLE DE PARIS
10 Rue Vauquelin, 75005 Paris