Numerical simulation of rock fragmentation mechanisms subject to wedge penetration for TBMs
文献类型：期刊论文
| 作者 | Zhou, Q. C.; Li, X. F.; Li, H. B.; Liu, Y. Q.; Xia, X. |
| 刊名 | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
 |
| 出版日期 | 2016 |
| 卷号 | 53页码:96-108 |
| ISSN号 | 0886-7798 |
| 关键词 | TBM indentation Wedge indenter Fragmentation Grain-based rock Particle flow code |
| DOI | 10.1016/j.tust.2015.12.010 |
| 英文摘要 | The rock fragmentation mechanism and failure process induced by a wedge indenter for TBMs are numerically simulated utilizing the discrete element method (DEM) in the present study. A novel clustered assembly approach with irregular boundaries for grain-based brittle rock is incorporated into the particle flow code (PFC) to calibrate the macro-responses such as the low tensile to compressive strength ratio observed in laboratory tests. The simulation results are compared with laboratory tests which were conducted to reveal the rock indentation process and rock-tool interactions. The numerical analysis can be divided to two main parts. Part one is to investigate the crack propagation and damage evolution at meso-scale associated with the force-indentation curve. The stress field distributions with respect to indentation time are depicted. It is revealed that the tensile cracks are resulted from the chipping process and the shear cracks are induced by the crushing force with the orientation angle ranging from 45 to 55, which is in good agreement with macro-observations. In Part two, the fragmentation efficiency and penetration rate under different cases are analyzed with several parameters such as the wedge angle, the confinement stress and the penetration velocity. Meanwhile, the blunt indenter is taken as a special case for analysis and comparison of the fragmentation mechanism. (C) 2015 Elsevier Ltd. All rights reserved. |
| WOS研究方向 | Construction & Building Technology ; Engineering |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000370886400009 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/3834]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn |
| 推荐引用方式 GB/T 7714 | Zhou, Q. C.,Li, X. F.,Li, H. B.,et al. Numerical simulation of rock fragmentation mechanisms subject to wedge penetration for TBMs[J]. TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,2016,53:96-108. |
| APA | Zhou, Q. C.,Li, X. F.,Li, H. B.,Liu, Y. Q.,&Xia, X..(2016).Numerical simulation of rock fragmentation mechanisms subject to wedge penetration for TBMs.TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,53,96-108. |
| MLA | Zhou, Q. C.,et al."Numerical simulation of rock fragmentation mechanisms subject to wedge penetration for TBMs".TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 53(2016):96-108. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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