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DOI	10.1016/j.epsl.2020.116133
	Experimental and modeling study of the effect of fault roughness on dynamic frictional sliding
	Tal Y.; Goebel T.; Avouac J.-P.
发表日期	2020
ISSN	0012821X
卷号	536
英文摘要	Friction governs many processes in nature from the motion of glaciers and landslides to tremors and earthquakes. The roughness of the sliding interfaces presumably affects their dynamics, in particular the condition for stable or unstable sliding. We investigate this issue by modeling numerically tri-axial stick-slip experiments on Westerly granite samples with different levels of roughness. The model accounts for surface roughness at the millimeter scale and assumes rate and state friction with enhanced dynamic weakening. It reproduces key characteristics observed in the experiments, such as sequences of fast stick-slip events for smooth surface and sequence of slow slip events with small stress drop followed by a large-stress drop unstable slip event for the rough interface. The increase in loading stiffness due to the additional resistance from roughness can explain the initial slow slip. The fast-unstable event may be the result of the higher critical stiffness due to the increase of local normal tractions with slip, as well as of the reduction of the loading stiffness due to contacts losses. The study allows examining numerically the relationship between the frictional behavior on the interface and the apparent friction estimated from external loads. We find that, because of dynamic overshoot, the reduction in apparent friction is larger than that of the actual friction coefficient on the interface. © 2020 Elsevier B.V.
关键词	fault friction friction experiments numerical modeling roughness slow slip stick-slip
英文关键词	Drops; Numerical models; Slip forming; Stick-slip; Stiffness; Additional resistances; Fault friction; Friction coefficients; Friction experiments; Frictional behavior; Key characteristics; Rate and state friction; slow slip; Surface roughness; experimental study; fault propagation; friction; loading; numerical model; roughness; sliding; slip rate; stick-slip; stiffness
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202924
作者单位	Seismological Laboratory, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States; Department of Geological and Environmental Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel; Department of Earth Sciences, University of California, Santa Cruz, CA, United States; Center for Earthquake Research and Information, University of Memphis, United States
推荐引用方式 GB/T 7714	Tal Y.,Goebel T.,Avouac J.-P.. Experimental and modeling study of the effect of fault roughness on dynamic frictional sliding[J],2020,536.
APA	Tal Y.,Goebel T.,&Avouac J.-P..(2020).Experimental and modeling study of the effect of fault roughness on dynamic frictional sliding.Earth and Planetary Science Letters,536.
MLA	Tal Y.,et al."Experimental and modeling study of the effect of fault roughness on dynamic frictional sliding".Earth and Planetary Science Letters 536(2020).