ORCID Profile
0000-0002-5866-7858
Current Organisation
Nanyang Technological University
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Publisher: Elsevier BV
Date: 12-2015
Publisher: Elsevier BV
Date: 09-2017
Publisher: Elsevier BV
Date: 06-2010
Publisher: Elsevier BV
Date: 11-2019
Publisher: Hindawi Limited
Date: 04-04-2019
DOI: 10.1155/2019/6972053
Publisher: Springer Science and Business Media LLC
Date: 08-05-2023
Publisher: Elsevier BV
Date: 09-2020
Publisher: The Royal Society
Date: 15-03-2021
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’.
Publisher: Elsevier BV
Date: 10-2019
Publisher: Springer Science and Business Media LLC
Date: 28-04-2022
Publisher: Springer Science and Business Media LLC
Date: 21-02-2018
Publisher: Springer Science and Business Media LLC
Date: 29-01-2018
Publisher: Springer Science and Business Media LLC
Date: 20-12-2019
Publisher: Research Publishing Services
Date: 2009
Publisher: Springer Science and Business Media LLC
Date: 30-09-2022
Publisher: Elsevier BV
Date: 10-2019
Publisher: Elsevier BV
Date: 06-2010
Publisher: Springer Science and Business Media LLC
Date: 29-03-2021
Publisher: Elsevier BV
Date: 05-2018
Publisher: CRC Press
Date: 14-04-2016
DOI: 10.1201/B21378-29
Publisher: Elsevier BV
Date: 07-2020
Publisher: Elsevier BV
Date: 02-2019
Publisher: Springer Science and Business Media LLC
Date: 30-04-2016
Publisher: Elsevier BV
Date: 07-2020
Publisher: Elsevier BV
Date: 08-2019
Publisher: Elsevier BV
Date: 04-2020
Publisher: Elsevier BV
Date: 10-2019
Publisher: Elsevier BV
Date: 03-2017
Publisher: American Society of Civil Engineers (ASCE)
Date: 06-2020
Publisher: Elsevier BV
Date: 04-2023
Publisher: American Geophysical Union (AGU)
Date: 08-04-2021
DOI: 10.1029/2020GL091807
Abstract: The recurrence patterns of the Parkfield tremors with period‐multiplying slow and fast ruptures provide new insights on the physics of earthquake cycles. However, the mechanisms behind the peculiar recurrence pattern and the coupling between slow‐slip events and seismic radiations are still unclear. Here, we conduct direct‐shear experiments on polycarbonate and granite fractures under varying stress conditions to investigate the variations of rupture properties near the stability transition. Laboratory slow and fast ruptures sequences produce slip‐predictable period‐multiplying cycles with correlative acoustic energy release, stress drop, event duration, and recurrence intervals. However, gouge accumulation by damage of the granite fracture provokes changes in stiffness and stress drops ratios over multiple cycles, affecting the recurrence intervals and energy release of consecutive slip events. These findings confirm the link between low‐frequency earthquakes and underlying slow‐slip events, with period‐multiplying cycles naturally occurring near the stability transition.
Publisher: Springer Science and Business Media LLC
Date: 07-10-2022
Publisher: Wiley
Date: 05-10-2018
DOI: 10.1002/NAG.2858
Publisher: Springer Science and Business Media LLC
Date: 03-12-2021
Publisher: Springer Science and Business Media LLC
Date: 19-08-2020
Publisher: Elsevier BV
Date: 06-2020
Publisher: Research Publishing Services
Date: 2009
Publisher: American Geophysical Union (AGU)
Date: 27-11-2017
DOI: 10.1002/2017GL075506
Publisher: Elsevier BV
Date: 11-2018
No related grants have been discovered for Wei Wu.