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Laboratory observations of transient frictional slip in rock-analog materials at co-seismic slip rates and rapid changes in normal stress
Yuan FP(袁福平); Prakash V; Prakash, V; Case Western Reserve Univ, Case Sch Engn, Dept Mech & Aerosp Engn, Cleveland, OH 44106 USA.
Source PublicationTECTONOPHYSICS
2012-08-10
Volume558Pages:58-69
ISSN0040-1951
AbstractKnowledge of frictional (shear) resistance and its dependency on slip distance, slip velocity, normal stress, and surface roughness is fundamental information for understanding earthquake physics and the energy released during such events. In view of this, in the present study, plate-impact pressure-shear friction experiments are conducted to investigate the frictional resistance in a rock analog material, i.e. soda-lime glass, under interfacial conditions of relevance to fault rupture. The results of the experiments indicate that a wide range of frictional slip conditions exist at the slip interface ranging from initial no-slip and followed by slip weakening, slip strengthening (healing), and seizure all during a single slip event. The slip-weakening phase is understood to be most likely due to thermal-induced flash heating and incipient melting at asperity junctions, while the slip strengthening (slip-healing) phase is understood to be a result of coalescence and solidification of local melt patches on the slip interface. In addition, plate impact pressure-shear normal-stress change (drop) experiments are employed to probe the response of the slip interface due to sudden alterations in normal stress. In particular, the location (timing) of the stress drop is varied so as to investigate the behavior of the slip interface in its slip-weakening, slip-strengthening (healing) phase, or the seized phase, in response to sudden drop in normal stress. These experimental results provide a rich set of data to better understand the range of possible friction slip states that can be achieved and/or critically examine existing dynamic friction models for fault slip behavior.
KeywordRock-analog Materials Co-seismic Slip Rates Rate Weakening And Strengthening Flash Heating Rapid Change In Normal Stress Plate-impact Pressure-shear Friction Experiments Velocity-dependent Friction Variable Normal Stress Molten-metal Films Dynamic Rupture Constitutive-equations Earthquake Prediction Sliding Conditions Melt Lubrication Fault Gouge Behavior
Subject Area损伤、破坏机理和微结构演化
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000307802900004
Funding OrganizationThe authors would like to acknowledge the financial support of National Science Foundation Earth Division through grants EAR: 0710975 and EAR: 0810083 for conducting this research. The authors would also like to acknowledge the Major Research Instrumentation Award CMS-0079458 by the National Science Foundation for the acquisition of the Multi-beam VALYN VISAR used in the present experiments.
DepartmentLNM材料介观力学性能的表征
Classification二类/Q2
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/46710
Collection非线性力学国家重点实验室
Corresponding AuthorPrakash, V; Case Western Reserve Univ, Case Sch Engn, Dept Mech & Aerosp Engn, Cleveland, OH 44106 USA.
Recommended Citation
GB/T 7714
Yuan FP,Prakash V,Prakash, V,et al. Laboratory observations of transient frictional slip in rock-analog materials at co-seismic slip rates and rapid changes in normal stress[J]. TECTONOPHYSICS,2012,558:58-69.
APA 袁福平,Prakash V,Prakash, V,&Case Western Reserve Univ, Case Sch Engn, Dept Mech & Aerosp Engn, Cleveland, OH 44106 USA..(2012).Laboratory observations of transient frictional slip in rock-analog materials at co-seismic slip rates and rapid changes in normal stress.TECTONOPHYSICS,558,58-69.
MLA 袁福平,et al."Laboratory observations of transient frictional slip in rock-analog materials at co-seismic slip rates and rapid changes in normal stress".TECTONOPHYSICS 558(2012):58-69.
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