Nucleation of frictional slip: A yielding or a fracture process?

Castellano, Miguel A.; Flavio, Lorez,; Kammer, David S.

doi:10.48550/arxiv.2209.07814

Cited by 1 publication

(1 citation statement)

References 66 publications

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“…The relative relevance of all of these parameters is currently under debate; e.g. [14,21,22,[25][26][27][28]. However, one of the authors of the present study recently proposed an encompassing theory that avalanches nucleate the instability such that µ * c = µ c and ν = 1/(1 − ζ).…”

Section: Introductionmentioning

confidence: 79%

Stick-slip synchronization in stack of elastically coupled frictional interfaces

Poincloux¹,

Reis²,

Geus³

2023

Preprint

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We perform physical and numerical experiments to study the stick-slip response of a stack of slabs in contact through dry frictional interfaces driven in quasistatic shear. The ratio between the drive's stiffness and the slab's shear stiffness controls the presence or absence of slip synchronization. A sufficiently high stiffness ratio leads to full synchronization, comprising periodic slip events in which all interfaces slip simultaneously. A lower stiffness ratio leads to asynchronous slips and, experimentally, to the stick-slip amplitude being broadly distributed as the number of layers in the stack increases. We interpret this broadening in light of the combined effect of surface disorder, complex loading paths of the asynchronous slips, and creep. The extracted aging rate is found to be of the same order of magnitude as existing experimental results on a similar material. Finally, we discuss the emergence of slow slips and an increase in creep-rate variations when more slabs are added to the stack.

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