The investigation of rock cutting simulation based on discrete element method
文献类型：期刊论文
| 作者 | Zhu, Xiaohua1; Liu, Weiji1; Lv, Yanxin1,2 |
| 刊名 | GEOMECHANICS AND ENGINEERING
 |
| 出版日期 | 2017 |
| 卷号 | 13期号:6页码:977-995 |
| 关键词 | discrete element method rock cutting failure mechanism fracture propagation hydrostatic pressure |
| ISSN号 | 2005-307X |
| DOI | 10.12989/gae.2017.13.6.977 |
| 英文摘要 | It is well accepted that rock failure mechanism influence the cutting efficiency and determination of optimum cutting parameters. In this paper, an attempt was made to research the factors that affect the failure mechanism based on discrete element method (DEM). The influences of cutting depth, hydrostatic pressure, cutting velocity, back rake angle and joint set on failure mechanism in rock-cutting are researched by PFC2D. The results show that: the ductile failure occurs at shallow cutting depths, the brittle failure occurs as the depth of cut increases beyond a threshold value. The mean cutting forces have a linear related to the cutting depth if the cutting action is dominated by the ductile mode, however, the mean cutting forces are deviate from the linear relationship while the cutting action is dominated by the brittle mode. The failure mechanism changes from brittle mode with larger chips under atmospheric conditions, to ductile mode with crushed chips under hydrostatic conditions. As the cutting velocity increases, a grow number of micro-cracks are initiated around the cutter and the volume of the chipped fragmentation is decreasing correspondingly. The crack initiates and propagates parallel to the free surface with a smaller rake angle, but with the rake angle increases, the direction of crack initiation and propagation is changed to towards the intact rock. The existence of joint set have significant influence on crack initiation and propagation, it makes the crack prone to propagate along the joint. |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000418508800006 |
| 出版者 | TECHNO-PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/4177]  |
| 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 | 1.Southwest Petr Univ, Sch Mechatron Engn ; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn |
| 推荐引用方式 GB/T 7714 | Zhu, Xiaohua,Liu, Weiji,Lv, Yanxin. The investigation of rock cutting simulation based on discrete element method[J]. GEOMECHANICS AND ENGINEERING,2017,13(6):977-995. |
| APA | Zhu, Xiaohua,Liu, Weiji,&Lv, Yanxin.(2017).The investigation of rock cutting simulation based on discrete element method.GEOMECHANICS AND ENGINEERING,13(6),977-995. |
| MLA | Zhu, Xiaohua,et al."The investigation of rock cutting simulation based on discrete element method".GEOMECHANICS AND ENGINEERING 13.6(2017):977-995. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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