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DOI | 10.1002/2017GL073768 |
On the micromechanics of slip events in sheared, fluid-saturated fault gouge | |
Dorostkar, Omid1,2,3; Guyer, Robert A.4,5; Johnson, Paul A.4; Marone, Chris6; Carmeliet, Jan1,2 | |
2017-06-28 | |
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:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; USA |
英文摘要 | We used a three-dimensional discrete element method coupled with computational fluid dynamics to study the poromechanical properties of dry and fluid-saturated granular fault gouge. The granular layer was sheared under dry conditions to establish a steady state condition of stick-slip dynamic failure, and then fluid was introduced to study its effect on subsequent failure events. The fluid-saturated case showed increased stick-slip recurrence time and larger slip events compared to the dry case. Particle motion induces fluid flow with local pressure variation, which in turn leads to high particle kinetic energy during slip due to increased drag forces from fluid on particles. The presence of fluid during the stick phase of loading promotes a more stable configuration evidenced by higher particle coordination number. Our coupled fluid-particle simulations provide grain-scale information that improves understanding of slip instabilities and illuminates details of phenomenological, macroscale observations. |
英文关键词 | slip micromechanics earthquake physics sheared granular materials CFD-DEM depositional wedge saturated fault gouge |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000405854200027 |
WOS关键词 | STICK-SLIP ; FRICTIONAL-PROPERTIES ; GRANULAR MATERIAL ; EARTHQUAKES ; MECHANISM ; SIMULATION ; SEISMICITY ; MEDIA ; PERMEABILITY ; PRESSURE |
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/26699 |
专题 | 气候变化 |
作者单位 | 1.Swiss Fed Inst Technol, Chair Bldg Phys, Dept Mech & Proc Engn, Swiss Fed Inst Technol Zurich, Zurich, Switzerland; 2.Empa, Lab Multiscale Studies Bldg Phys, Swiss Fed Labs Mat Sci & Technol, Dubendorf, Switzerland; 3.Swiss Fed Inst Technol, Dept Civil Environm & Geomat Engn, Swiss Fed Inst Technol Zurich, Zurich, Switzerland; 4.Los Alamos Natl Lab, Solid Earth Geophys Grp, Los Alamos, NM USA; 5.Univ Nevada, Dept Phys, Reno, NV 89557 USA; 6.Penn State Univ, Dept Geosci, University Pk, PA 16802 USA |
推荐引用方式 GB/T 7714 | Dorostkar, Omid,Guyer, Robert A.,Johnson, Paul A.,et al. On the micromechanics of slip events in sheared, fluid-saturated fault gouge[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(12). |
APA | Dorostkar, Omid,Guyer, Robert A.,Johnson, Paul A.,Marone, Chris,&Carmeliet, Jan.(2017).On the micromechanics of slip events in sheared, fluid-saturated fault gouge.GEOPHYSICAL RESEARCH LETTERS,44(12). |
MLA | Dorostkar, Omid,et al."On the micromechanics of slip events in sheared, fluid-saturated fault gouge".GEOPHYSICAL RESEARCH LETTERS 44.12(2017). |
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