Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session V02: Polymers and Soft Solids at Interfaces: Tribology, Wear, Rheology and Interactions
3:00 PM–6:00 PM,
Thursday, March 18, 2021
Sponsoring
Units:
DPOLY DSOFT DFD GSNP
Chair: Saad Khan, North Carolina State University; Catheryn Jackson, Dow Chemical
Abstract: V02.00006 : The slippery slope of frictional layered structures
4:48 PM–5:00 PM
Live
Presenter:
Samuel Poincloux
(Flexible Structures Laboratory, Institute of Mechanical Engineering, École Polytechnique Fédérale de Lausanne)
Authors:
Samuel Poincloux
(Flexible Structures Laboratory, Institute of Mechanical Engineering, École Polytechnique Fédérale de Lausanne)
Tom De Geus
(Physics of Complex Systems Laboratory, Institute of Physics, École Polytechnique Fédérale de Lausanne)
Matthieu Wyart
(Physics of Complex Systems Laboratory, Institute of Physics, École Polytechnique Fédérale de Lausanne)
Pedro M Reis
(Flexible Structures Laboratory, Institute of Mechanical Engineering, École Polytechnique Fédérale de Lausanne)
Two sliding frictional surfaces can display a strong intermittent response known as stick-slip, characterized by a succession of loading phases, interrupted by sudden macroscopic slip events. The static friction coefficient describes the onset of these events; however, it is now known not to be a well-defined material constant [1]. A stochastic nature of this friction coefficient has recently been suggested, with macroscopic slips triggered by microscopic avalanches. Such small-scale events act as scars where inertia leads to local weakening; when a critical size is reached, a slip-event propagates along the interface [2]. We use experiments and simulations to investigate the role of inertial interactions through bulk elasticity of a frictional layered system. Specifically, we investigate a system of stacked plates with frictional interfaces forced to slide simultaneously. We observe that the statistical properties of the stick-slip events in the multilayered set-up deviate from that of a single layer, suggesting a nontrivial coupling across the stack. This work may bring a better understanding of the seismic behavior of layered geological formations.
[1] Ben-David, O., & Fineberg, J. (2011). PRL, 106(25), 254301.
[2] de Geus, T. W. J, et al. (2019). PNAS, 116(48), 23977-23983.
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