Fracture of a liquefied crack and the physics of Rayleigh waves

被引：0
|
作者：
Knopoff, L. [1 ]
Landoni, J. A.
机构：
[1] Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095 USA
[2] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA
来源：
PURE AND APPLIED GEOPHYSICS | 2006年 / 163卷 / 09期
关键词：
fracture; faulting; boundary conditions; Rayleigh waves;
D O I：
10.1007/s00024-006-0094-2
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
The standard free-surface boundary conditions for in-plane crack dynamics are shown to be identical to the conditions for crack dynamics on a liquefied crack. The surfaces of both the free and liquefied cracks do not separate during faulting and hence the static normal stress is not relaxed by the faulting. A crack with either free or liquid boundary conditions deforms in the transverse direction during slip. It follows that both the free and liquefied cracks may represent solutions to the heat-flow paradox. As an application of the proof, we derive a physical understanding of the properties of harmonic Rayleigh waves on a uniform elastic half-space without solving a cubic equation.
引用
收藏
页码：1741 / 1750
页数：10
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