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DOI	10.1073/pnas.1517545113
	Properties of the shear stress peak radiated ahead of rapidly accelerating rupture fronts that mediate frictional slip
	Svetlizky I.; Muñoz D.P.; Radiguet M.; Kammer D.S.; Molinari J.-F.; Fineberg J.
发表日期	2016
ISSN	0027-8424
起始页码	542
结束页码	547
卷号	113 期号:3
英文摘要	We study rapidly accelerating rupture fronts at the onset of frictional motion by performing high-temporal-resolution measurements of both the real contact area and the strain fields surrounding the propagating rupture tip. We observe large-amplitude and localized shear stress peaks that precede rupture fronts and propagate at the shear-wave speed. These localized stress waves, which retain a well-defined form, are initiated during the rapid rupture acceleration phase. They transport considerable energy and are capable of nucleating a secondary supershear rupture. The amplitude of these localized waves roughly scales with the dynamic stress drop and does not decrease as long as the rupture front driving it continues to propagate. Only upon rupture arrest does decay initiate, although the stress wave both continues to propagate and retains its characteristic form. These experimental results are qualitatively described by a self-similar model: a simplified analytical solution of a suddenly expanding shear crack. Quantitative agreement with experiment is provided by realistic finiteelement simulations that demonstrate that the radiated stress waves are strongly focused in the direction of the rupture front propagation and describe both their amplitude growth and spatial scaling. Our results demonstrate the extensive applicability of brittle fracture theory to fundamental understanding of friction. Implications for earthquake dynamics are discussed.
英文关键词	Acoustic radiation; Earthquake dynamics; Friction; Nonsteady rupture dynamics; Seismic radiation
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159082
作者单位	Svetlizky, I., Racah Institute of Physics, Hebrew University of Jerusalem, Givat Ram, Jerusalem, 91904, Israel; Muñoz, D.P., Civil Engineering Institute, Materials Science and Engineering Institute, Ecole Polytechnique Fédérale de Lausanne, Station 18, Lausanne, CH-1015, Switzerland; Radiguet, M., Civil Engineering Institute, Materials Science and Engineering Institute, Ecole Polytechnique Fédérale de Lausanne, Station 18, Lausanne, CH-1015, Switzerland; Kammer, D.S., Racah Institute of Physics, Hebrew University of Jerusalem, Givat Ram, Jerusalem, 91904, Israel; Molinari, J.-F., Civil Engineering Institute, Materials Science and Engineering Institute, Ecole Polytechnique Fédérale de Lausanne, Station 18, Lausanne, CH-1015, Switzerland; Fineberg, J., Racah Institute of Physics, Hebrew University of Jerusalem, Givat Ram, Jerusalem, 91904, Israel
推荐引用方式 GB/T 7714	Svetlizky I.,Muñoz D.P.,Radiguet M.,et al. Properties of the shear stress peak radiated ahead of rapidly accelerating rupture fronts that mediate frictional slip[J],2016,113(3).
APA	Svetlizky I.,Muñoz D.P.,Radiguet M.,Kammer D.S.,Molinari J.-F.,&Fineberg J..(2016).Properties of the shear stress peak radiated ahead of rapidly accelerating rupture fronts that mediate frictional slip.Proceedings of the National Academy of Sciences of the United States of America,113(3).
MLA	Svetlizky I.,et al."Properties of the shear stress peak radiated ahead of rapidly accelerating rupture fronts that mediate frictional slip".Proceedings of the National Academy of Sciences of the United States of America 113.3(2016).