Experimental study on interaction characteristics of explosive cracks under confining pressure and its comparison with free boundary results
文献类型：期刊论文
| 作者 | Peng, Linzhi3,4; Yue, Zhongwen2; Wang X(王旭)2; Zhou, Jun1 |
| 刊名 | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
 |
| 出版日期 | 2024-11-01 |
| 卷号 | 33页码:4637-4653 |
| 关键词 | Confining pressure Crack interaction Dynamic fracture Dynamic caustics experiments Directional blasting |
| ISSN号 | 2238-7854 |
| DOI | 10.1016/j.jmrt.2024.10.094 |
| 通讯作者 | Peng, Linzhi(plz2023@cdut.edu.cn) |
| 英文摘要 | The influence of confining pressure on the dynamic fracture mechanical behavior of deep rock masses is crucial in the exploitation of deep resources and the development of underground spaces. In this study, dynamic caustics experiments were conducted using transparent epoxy resin materials to investigate the crack propagation behavior and interaction mechanisms of double cracks under confinement. The experimental results indicate that biaxial confining pressure suppresses crack propagation, interaction between double cracks, and penetration. Without confining pressure, cracks do not penetrate until the relative vertical distance O H between crack tips is 20 mm, whereas with confining pressure, cracks cease to penetrate when the relative vertical distance between crack tips is 10 mm; however, interaction between crack tips still exists at this point. During the crack interaction stage, both fracture toughness and propagation velocity of crack tips exhibit significant fluctuations under no confining pressure conditions, whereas under confining pressure, both decrease rapidly. Additionally, under confining pressure conditions, the fluctuation range of crack propagation direction during crack interaction is relatively small. Confining pressure rapidly reduces the degree of stress concentration at crack tips, increases the rate of energy release at crack tips, and enhances the ability of dynamic cracks to resist the influence of other crack tips or crack surfaces. Under confining pressure, continuous Rayleigh waves are typically observed at crack tips due to an imbalance between stored strain energy and the energy release rate. These waves dissipate part of the strain energy, promoting crack deflection and branching. |
| 分类号 | 一类 |
| WOS关键词 | TIP ; FIELD |
| 资助项目 | National Natural Science Founda-tion of China[52174094] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001339346500001 |
| 资助机构 | National Natural Science Founda-tion of China |
| 其他责任者 | Peng, Linzhi |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/97109]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 作者单位 | 1.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing, Peoples R China 2.China Univ Min & Technol Beijing, Sch Mech & Civil Engn, Beijing, Peoples R China; 3.Chengdu Univ Technol, Sch Environm & Civil Engn, Chengdu, Peoples R China; 4.Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Prot, Chengdu, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Peng, Linzhi,Yue, Zhongwen,Wang X,et al. Experimental study on interaction characteristics of explosive cracks under confining pressure and its comparison with free boundary results[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,33:4637-4653. |
| APA | Peng, Linzhi,Yue, Zhongwen,王旭,&Zhou, Jun.(2024).Experimental study on interaction characteristics of explosive cracks under confining pressure and its comparison with free boundary results.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,33,4637-4653. |
| MLA | Peng, Linzhi,et al."Experimental study on interaction characteristics of explosive cracks under confining pressure and its comparison with free boundary results".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 33(2024):4637-4653. |
入库方式： OAI收割
来源：力学研究所
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