Frictional Resistance within the Wake of Frictional Rupture Fronts

Ilya Svetlizky, Elsa Bayart, Gil Cohen, and Jay Fineberg
Phys. Rev. Lett. 118, 234301 – Published 8 June 2017
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Abstract

Frictional resistance to slip, τ, is determined by the real area of contact, A, and the shear strength of the contacts forming the frictional interface. We perform simultaneous high-speed local measurements of τ and A at the tail of propagating rupture fronts. Rate dependence is investigated over 2 orders of magnitude of local slip velocities which reach up to 1m/s. A critical slip velocity is observed that signifies a transition in the frictional behavior: enhanced velocity weakening of A and τ. These measurements enable us to infer the contact shear strength, an otherwise elusive quantity, and show that the contact shear strength persistently increases with slip rate. This, surprisingly, contrasts with expected contact softening at the high temperatures induced by rapid sliding.

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  • Received 15 March 2017

DOI:https://doi.org/10.1103/PhysRevLett.118.234301

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Nonlinear Dynamics

Authors & Affiliations

Ilya Svetlizky, Elsa Bayart, Gil Cohen, and Jay Fineberg

  • The Racah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel

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Issue

Vol. 118, Iss. 23 — 9 June 2017

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