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Title: Transition from static to dynamic friction in an array of frictional disks
Authors: Charan, Harish
Chattoraj, Joyjit
Pica Ciamarra, Massimo
Procaccia, Itamar
Keywords: Science::Physics::Atomic physics::Statistical physics
Issue Date: 2020
Source: Charan, H., Chattoraj, J., Pica Ciamarra, M., & Procaccia, I. (2020). Transition from static to dynamic friction in an array of frictional disks. Physical Review Letters, 124(3), 030602-. doi:10.1103/PhysRevLett.124.030602
Journal: Physical Review Letters 
Abstract: The nature of an instability that controls the transition from static to dynamical friction is studied in the context of an array of frictional disks that are pressed from above on a substrate. In this case the forces are all explicit and Newtonian dynamics can be employed without any phenomenological assumptions. We show that an oscillatory instability that had been discovered recently is responsible for the transition, allowing individual disks to spontaneously reach the Coulomb limit and slide with dynamic friction. The transparency of the model allows a full understanding of the phenomenon, including the speeds of the waves that travel from the trailing to the leading edge and vice versa.
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.124.030602
Schools: School of Physical and Mathematical Sciences 
Rights: © 2020 American Physical Society. All rights reserved. This paper was published in Physical Review Letters and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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