Insights from tensile fracture properties and full-field strain evolution of deep coral reef limestone under dynamic loads
文献类型：期刊论文
| 作者 | Wu, Kai1,3; Meng, Qingshan1,3; Li, Hongya2; Deng, Jiajun2; Liu, Haifeng3; Wang, Chi1,3; Luo, Le1,3; Shen, Tianli1,3 |
| 刊名 | ENGINEERING GEOLOGY
 |
| 出版日期 | 2024-11-01 |
| 卷号 | 341页码:16 |
| 关键词 | Coral reef limestone Biological pore Dynamic tensile fracture Crack propagation velocity Rate dependence |
| ISSN号 | 0013-7952 |
| DOI | 10.1016/j.enggeo.2024.107738 |
| 英文摘要 | Coral reef limestone (CRL) commonly undergoes dynamic tension when underground structures of island reefs encounter impacts, explosions, or seismic activities. Given the complexity of biological pores, the dynamic tensile fracture characteristics of CRL are poorly understood. Therefore, the dynamic tensile fracture behaviors of deep CRL were systematically observed by Split Hopkinson Pressure Bar tests and digital image techniques. Comparing to traditional rocks, the macro-pores near failure band would significantly change cracking path. The failure patterns are dominated by loading rate. The strongly dependence of dynamic tensile strength and dynamic crack initiation toughness on loading rate suggests the two indices overcome the effect of CRL macro-pores under dynamic impacts. At low loading rates, tensile fractures predominantly follow intergranular cracks, whereas transgranular cracks dominate at higher rates. The fractal dimension of fracture surface decreases with increasing crack propagation velocity, loading rate, and dynamic crack initiation toughness. Due to the unique marine sedimentary environment, the mechanical heterogeneity in multiple scales distinguishes CRL from terrestrial rock materials. The insights into underlying mechanisms of dynamic tension provide support to optimization of blasting scheme and stability assessments for island underground engineering. |
| 资助项目 | National Natural Science Founda-tion of China[41877267] ; National Natural Science Founda-tion of China[41877260] ; Priority Research Program of the Chinese Academy of Sciences[XDA13010201] ; National Key Research and Development Program of China[2021YFC3100604] ; National Natural Science Foundation of China[42107202] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001328176700001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42720]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Meng, Qingshan |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Army Engn Univ PLA, State Key Lab Disaster Prevent & Mitigat Explos &, Nanjing 210007, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Kai,Meng, Qingshan,Li, Hongya,et al. Insights from tensile fracture properties and full-field strain evolution of deep coral reef limestone under dynamic loads[J]. ENGINEERING GEOLOGY,2024,341:16. |
| APA | Wu, Kai.,Meng, Qingshan.,Li, Hongya.,Deng, Jiajun.,Liu, Haifeng.,...&Shen, Tianli.(2024).Insights from tensile fracture properties and full-field strain evolution of deep coral reef limestone under dynamic loads.ENGINEERING GEOLOGY,341,16. |
| MLA | Wu, Kai,et al."Insights from tensile fracture properties and full-field strain evolution of deep coral reef limestone under dynamic loads".ENGINEERING GEOLOGY 341(2024):16. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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