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DOI | 10.1002/2017GL074939 |
Critical Nucleation Length for Accelerating Frictional Slip | |
Aldam, Michael1; Weikamp, Marc2; Spatschek, Robert2; Brener, Efim A.3; Bouchbinder, Eran1 | |
2017-11-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:22 |
文章类型 | Article |
语种 | 英语 |
国家 | Israel; Germany |
英文摘要 | The spontaneous nucleation of accelerating slip along slowly driven frictional interfaces is central to a broad range of geophysical, physical, and engineering systems, with particularly far-reaching implications for earthquake physics. A common approach to this problem associates nucleation with an instability of an expanding creep patch upon surpassing a critical length L-c. The critical nucleation length Lc is conventionally obtained from a spring-block linear stability analysis extended to interfaces separating elastically deformable bodies using model-dependent fracture mechanics estimates. We propose an alternative approach in which the critical nucleation length is obtained from a related linear stability analysis of homogeneous sliding along interfaces separating elastically deformable bodies. For elastically identical half-spaces and rate-and-state friction, the two approaches are shown to yield Lc that features the same scaling structure, but with substantially different numerical prefactors, resulting in a significantly larger Lc in our approach. The proposed approach is also shown to be naturally applicable to finite-size systems and bimaterial interfaces, for which various analytic results are derived. To quantitatively test the proposed approach, we performed inertial Finite-Element-Method calculations for a finite-size two-dimensional elastically deformable body in rate-and-state frictional contact with a rigid body under sideway loading. We show that the theoretically predicted Lc and its finite-size dependence are in reasonably good quantitative agreement with the full numerical solutions, lending support to the proposed approach. These results offer a theoretical framework for predicting rapid slip nucleation along frictional interfaces. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000419102300020 |
WOS关键词 | DYNAMIC RUPTURE ; BIMATERIAL INTERFACE ; STICK-SLIP ; FAULT ; EARTHQUAKE ; STABILITY ; PULSE ; INSTABILITY |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28315 |
专题 | 气候变化 |
作者单位 | 1.Weizmann Inst Sci, Chem Phys Dept, Rehovot, Israel; 2.Forschungszentrum Julich, Inst Energy & Climate Res, Julich, Germany; 3.Forschungszentrum Julich, Peter Grunberg Inst, Julich, Germany |
推荐引用方式 GB/T 7714 | Aldam, Michael,Weikamp, Marc,Spatschek, Robert,et al. Critical Nucleation Length for Accelerating Frictional Slip[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(22). |
APA | Aldam, Michael,Weikamp, Marc,Spatschek, Robert,Brener, Efim A.,&Bouchbinder, Eran.(2017).Critical Nucleation Length for Accelerating Frictional Slip.GEOPHYSICAL RESEARCH LETTERS,44(22). |
MLA | Aldam, Michael,et al."Critical Nucleation Length for Accelerating Frictional Slip".GEOPHYSICAL RESEARCH LETTERS 44.22(2017). |
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