DOI: 10.1002/grl.50813
论文题名: Microslips as precursors of large slip events in the stick-slip dynamics of sheared granular layers: A discrete element model analysis
作者: Ferdowsi B. ; Griffa M. ; Guyer R.A. ; Johnson P.A. ; Marone C. ; Carmeliet J.
刊名: Geophysical Research Letters
ISSN: 0094-8634
EISSN: 1944-8365
出版年: 2013
卷: 40, 期: 16 起始页码: 4194
结束页码: 4198
语种: 英语
英文关键词: discrete element modeling
; microslips
; precursory activity
; sheared granular layer
; stick-slip dynamics
Scopus关键词: Discrete element modeling
; Granular layer
; Granular Packings
; Microslips
; Orders of magnitude
; Stick-slip behavior
; Stick-slip dynamics
; Three-dimensional Discrete Element Methods
; Granular materials
; Slip forming
; Finite difference method
; discrete element method
; emergence
; energy efficiency
; numerical model
; slip
; stick-slip
; three-dimensional modeling
英文摘要: We investigate the stick-slip behavior of a granular system confined and sheared by deformable solid blocks using three-dimensional discrete element method simulations. Our modeling results show that large slip events are preceded by a sequence of small slip events - microslips - whose occurrence accelerates exponentially before the large slip event onset. Microslips exhibit energy release several orders of magnitude smaller than the large slip events. The microslip event rate is proposed as a measure of slip activity in the granular gouge layer. A statistical analysis shows that microslip event rate correlates well with large slip event onset and that variations in it can be used to predict large slip events. The emergence of microslips and their duration are found to be controlled by the value of the slipping contact ratio and are therefore related to the jamming/unjamming transition of frictional granular packings. Key Points Microslip event rate is proposed as a measure of activity in granular layer Microslip event rate correlates well with large slip events Microslips emergence is controlled by the value of the slipping contact ratio. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84881625270&doi=10.1002%2fgrl.50813&partnerID=40&md5=b730cc758e743453afc76f05693bf6a1
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5898
Appears in Collections: 气候减缓与适应
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作者单位: Department of Civil, Environmental and Geomatic Engineering, Swiss Federal Institute of Technology Zürich, Zürich, Switzerland
Recommended Citation:
Ferdowsi B.,Griffa M.,Guyer R.A.,et al. Microslips as precursors of large slip events in the stick-slip dynamics of sheared granular layers: A discrete element model analysis[J]. Geophysical Research Letters,2013-01-01,40(16).