Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/147162
Title: Fracture asperity evolution during the transition from stick slip to stable sliding
Authors: Mei, Cheng
Wu, Wei
Keywords: Engineering::Civil engineering
Issue Date: 2021
Source: Mei, C. & Wu, W. (2021). Fracture asperity evolution during the transition from stick slip to stable sliding. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 379(2196), 20200133--. https://dx.doi.org/10.1098/rsta.2020.0133
Journal: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Abstract: Fracture asperities interlock or break during stick slip and ride over each other during stable sliding. The evolution of fracture asperities during the transition between stick slip and stable sliding has attracted less attention, but is important to predict fracture behaviour. Here, we conduct a series of direct shear experiments on simulated fractures in homogeneous polycarbonate to examine the evolution of fracture asperities in the transition stage. Our results show that the transition stage occurs between the stick slip and stable sliding stages during the progressive reduction in normal stress on the smooth and rough fractures. Both the fractures exhibit the alternative occurrence of small and large shear stress drops followed by the deterministic chaos in the transition stage. Our data indicate that the asperity radius of curvature correlates linearly with the dimensionless contact area under a given normal stress. For the rough fracture, a bifurcation of acoustic energy release appears when the dimensionless contact area decreases in the transition stage. The evolution of fracture asperities is stress-dependent and velocity-dependent. This article is part of the theme issue 'Fracture dynamics of solid materials: from particles to the globe'.
URI: https://hdl.handle.net/10356/147162
ISSN: 1364-503X
DOI: 10.1098/rsta.2020.0133
Rights: © 2021 The Author(s). All rights reserved. This paper was published by the Royal Society in Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences and is made available with permission of The Author(s).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

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