气候变化领域集成服务门户(CCPortal): Supershear Frictional Ruptures Along Bimaterial Interfaces

CCPortal

DOI	10.1029/2020JB019829
	Supershear Frictional Ruptures Along Bimaterial Interfaces
	Shlomai H.; Adda-Bedia M.; Arias R.E.; Fineberg J.
发表日期	2020
ISSN	21699313
卷号	125 期号:8
英文摘要	We experimentally and analytically explore supershear ruptures that are excited at the onset of frictional motion within “bimaterial interfaces,” frictional interfaces formed by contacting bodies having different elastic (or geometric) properties. Our experiments on PMMA blocks sliding on polycarbonate show that the structure, transition sequence, and range of existence of such supershear ruptures are highly dependent on their propagation direction relative to the slip direction in the softer of the two materials. These properties are characterized for both the positive (parallel) and negative (antiparallel) propagation directions. An analytic, fracture-mechanics based description of supershear ruptures is derived. The theory quantitatively predicts both supershear structure and the allowed propagation range of supershear ruptures. The latter compares well with both the experimentally observed supershear ruptures in the negative direction as well as localized slip pulses in the positive direction, whose propagation speed lies between the shear velocities of both materials. Supershear ruptures in the positive direction, which are composed of trains of propagating slip pulses, evade this theoretical description. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	bimaterial; earthquake dynamics; fracture; friction; supershear
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187705
作者单位	The Racah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem, Israel; Université de Lyon, Ecole Normale Supérieure de Lyon, Université Claude Bernard, CNRS, Laboratoire de Physique, Lyon, France; Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Santiago, Chile
推荐引用方式 GB/T 7714	Shlomai H.,Adda-Bedia M.,Arias R.E.,et al. Supershear Frictional Ruptures Along Bimaterial Interfaces[J],2020,125(8).
APA	Shlomai H.,Adda-Bedia M.,Arias R.E.,&Fineberg J..(2020).Supershear Frictional Ruptures Along Bimaterial Interfaces.Journal of Geophysical Research: Solid Earth,125(8).
MLA	Shlomai H.,et al."Supershear Frictional Ruptures Along Bimaterial Interfaces".Journal of Geophysical Research: Solid Earth 125.8(2020).