DOI: 10.1002/2014GL059832
论文题名: Stick-slip and creep behavior in lubricated granular material: Insights into the brittle-ductile transition
作者: Reber J.E. ; Hayman N.W. ; Lavier L.L.
刊名: Geophysical Research Letters
ISSN: 0094-10068
EISSN: 1944-9799
出版年: 2014
卷: 41, 期: 10 起始页码: 3471
结束页码: 3477
语种: 英语
英文关键词: brittle-ductile transition
; creep
; stick lip
; strain transient
Scopus关键词: Creep
; Experiments
; Silicones
; Stick-slip
; Strain rate
; Transients
; Brittle-ductile transition
; Crustal deformations
; Gradual transition
; Interstitial fluids
; Physical experiments
; stick lip
; Strain transients
; Viscous deformation
; Slip forming
; creep
; crustal deformation
; damping
; ductility
; granular medium
; polymer
; rheology
; shear zone
; stick-slip
; strain analysis
; viscosity
英文摘要: Crustal deformation can occur via stick-slip events, viscous creep, or strain transients at variable rates. Here we explore such strain transients with physical experiments comprising a quasi-two-dimensional shear zone with elastic, acrylic discs and interstitial viscous silicone. Experiments of solely elastic discs produce stick-slip events and an overall (constant volume) strengthening. The addition of the viscous silicone enhances localization but does not greatly change the overall pattern of strengthening. It does, however, damp the stick-slip events, leading to transient, creep-like behavior that approaches the behavior of a Maxwell body. There is no gradual transition from frictional to viscous deformation with increasing amounts of silicone, suggesting that the mixed rheology is in effect as soon as an interstitial fluid is present. Our experiments support the hypothesis that a possible cause for strain transients in nature is an interstitial viscous phase in shear zones. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84901384577&doi=10.1002%2f2014GL059832&partnerID=40&md5=dd8f579faaa0b35679ede6267778820f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7332
Appears in Collections: 气候减缓与适应
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作者单位: Institute for Geophysics, University of Texas at Austin, Austin, TX, United States
Recommended Citation:
Reber J.E.,Hayman N.W.,Lavier L.L.. Stick-slip and creep behavior in lubricated granular material: Insights into the brittle-ductile transition[J]. Geophysical Research Letters,2014-01-01,41(10).