Crack classification and evolution in anisotropic shale during cyclic loading tests by acoustic emission
文献类型：期刊论文
| 作者 | Wang, Miaomiao1,2; Tan, Chengxuan1,2; Meng, Jing1,2; Yang, Baicun3; Li, Yuan3 |
| 刊名 | JOURNAL OF GEOPHYSICS AND ENGINEERING
 |
| 出版日期 | 2017-08-01 |
| 卷号 | 14期号:4页码:930-938 |
| 关键词 | shale cyclic loading bedding plane acoustic emission tensile crack shear crack |
| ISSN号 | 1742-2132 |
| DOI | 10.1088/1742-2140/aa6f24 |
| 文献子类 | Article |
| 英文摘要 | Characterization and evolution of the cracking mode in shale formation is significant, as fracture networks are an important element in shale gas exploitation. In this study we determine the crack modes and evolution in anisotropic shale under cyclic loading using the acoustic emission (AE) parameter-analysis method based on the average frequency and RA (rise-time/amplitude) value. Shale specimens with bedding-plane orientations parallel and perpendicular to the axial loading direction were subjected to loading cycles with increasing peak values until failure occurred. When the loading was parallel to the bedding plane, most of the cracks at failure were shear cracks, while tensile cracks were dominant in the specimens that were loaded normal to the bedding direction. The evolution of the crack mode in the shale specimens observed in the loading-unloading sequence except for the first cycle can be divided into three stages: (I) no or several cracks (AE events) form as a result of the Kaiser effect, (II) tensile and shear cracks increase steadily at nearly equal proportions, (III) tensile cracks and shear cracks increase abruptly, with more cracks forming in one mode than in the other. As the dominant crack motion is influenced by the bedding, the failure mechanism is discussed based on the evolution of the different crack modes. Our conclusions can increase our understanding of the formation mechanism of fracture networks in the field. |
| WOS关键词 | CONCRETE ; DAMAGE ; ROCK ; THRESHOLDS ; FRACTURE |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000404362600002 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030302) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030302) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030302) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030302) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/50253]  |
| 专题 | 地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室 |
| 通讯作者 | Wang, Miaomiao; Meng, Jing |
| 作者单位 | 1.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China 2.Chinese Acad Geol Sci, Inst Geomech, Minist Land & Resources, Key Lab Neotecton Movement & Geohazards, Beijing 100081, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Miaomiao,Tan, Chengxuan,Meng, Jing,et al. Crack classification and evolution in anisotropic shale during cyclic loading tests by acoustic emission[J]. JOURNAL OF GEOPHYSICS AND ENGINEERING,2017,14(4):930-938. |
| APA | Wang, Miaomiao,Tan, Chengxuan,Meng, Jing,Yang, Baicun,&Li, Yuan.(2017).Crack classification and evolution in anisotropic shale during cyclic loading tests by acoustic emission.JOURNAL OF GEOPHYSICS AND ENGINEERING,14(4),930-938. |
| MLA | Wang, Miaomiao,et al."Crack classification and evolution in anisotropic shale during cyclic loading tests by acoustic emission".JOURNAL OF GEOPHYSICS AND ENGINEERING 14.4(2017):930-938. |
入库方式： OAI收割
来源：地质与地球物理研究所
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