Underlying Mechanisms of Crack Initiation for Granitic Rocks Containing a Single Pre-existing Flaw: Insights From Digital Image Correlation (DIC) Analysis
文献类型：期刊论文
| 作者 | Liu, Liwang1,3; Li, Haibo1,3 ; Li, Xiaofeng1; Wu, Di1,3; Zhang, Guokai2
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| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2020-11-20 |
| 页码 | 17 |
| 关键词 | Crack initiation mechanisms Digital image correlation (DIC) analysis Wing cracks Anti-wing cracks Pre-existing flaw |
| ISSN号 | 0723-2632 |
| DOI | 10.1007/s00603-020-02286-x |
| 英文摘要 | Determination on underlying mechanisms of crack initiation is of vital importance to understand the failure processes of geomaterials in practical engineering. In this study, uniaxial compression experiments of granitic samples containing a single pre-existing flaw were conducted and the failure processes were recorded by using the high-speed camera. To quantitatively determine the crack initiation mechanism, a novel method was first proposed based on digital image correlation (DIC) analysis and then its validity was confirmed. By utilizing this method, three types of cracks with different initiation mechanisms were identified and the effect of flaw inclination angle on crack initiation mechanisms was discussed from the viewpoint of theoretical analysis. With the increase of inclination angles, wing cracks change from mixed mode I/II cracks to mode I cracks, while anti-wing cracks have no evident changes and are dominated by mode II cracks. Under compressive pressure, the upper and bottom surfaces of pre-existing flaw deform to each other and the distributions of full-field tangential stress around flaw are different, which might induce the variation of crack initiation mechanisms with regard to the inclination angle. |
| 资助项目 | National Natural Science Foundation of China[51439008] ; National Natural Science Foundation of China[51809137] ; National Natural Science Foundation of China[41525009] ; Natural Science Foundation of Jiangsu Province[BK 20180480] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000590944600001 |
| 出版者 | SPRINGER WIEN |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/25143]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, Xiaofeng |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Nanjing Univ Sci & Technol, Sch Mech Engn, Nanjing 210094, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Liwang,Li, Haibo,Li, Xiaofeng,et al. Underlying Mechanisms of Crack Initiation for Granitic Rocks Containing a Single Pre-existing Flaw: Insights From Digital Image Correlation (DIC) Analysis[J]. ROCK MECHANICS AND ROCK ENGINEERING,2020:17. |
| APA | Liu, Liwang,Li, Haibo,Li, Xiaofeng,Wu, Di,&Zhang, Guokai.(2020).Underlying Mechanisms of Crack Initiation for Granitic Rocks Containing a Single Pre-existing Flaw: Insights From Digital Image Correlation (DIC) Analysis.ROCK MECHANICS AND ROCK ENGINEERING,17. |
| MLA | Liu, Liwang,et al."Underlying Mechanisms of Crack Initiation for Granitic Rocks Containing a Single Pre-existing Flaw: Insights From Digital Image Correlation (DIC) Analysis".ROCK MECHANICS AND ROCK ENGINEERING (2020):17. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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