Micro-mechanism study on rock breaking behavior under water jet impact using coupled SPH-FEM/DEM method with Voronoi grains
文献类型：期刊论文
| 作者 | Wu, Zhijun; Yu, Fangzheng; Zhang, Penglin; Liu, Xuewei |
| 刊名 | ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
 |
| 出版日期 | 2019 |
| 卷号 | 108页码:472-483 |
| 关键词 | SPH-FEM/DEM Water jet impact Rock breaking behavior Micro-structure Micro-mechanical properties |
| ISSN号 | 0955-7997 |
| DOI | 10.1016/j.enganabound.2019.08.026 |
| 英文摘要 | In this study, a two-dimensional SPH-FEM/DEM coupled model is developed to investigate rock breaking behavior under water jet impact based on the LS-DYNA software, where the SPH method is adopted to model the water jet and the FEM/DEM method is adopted to simulate rock breaking response, respectively. To better approximate the micro-structure of rock, a Voronoi tessellation technique is adopted to generate the random polygonal grains. A zero-thickness cohesive element is inserted along the boundaries of the Voronoi grains to model the mechanical interaction between grains as well as the breaking process of rock. Numerical water jet impact tests on sandstone are firstly conducted to verify the proposed method as well as calibrate the corresponding micro-parameters. Then, using the verified method, the effects of micro-structure and micro-mechanical properties on the rock breaking performance under water jet impact are systematically investigated. The numerical results show that the rock breaking performance is greatly affected by grain size and irregularity, ductility, microscopic strength and the heterogeneity of micro-parameters, whereas the contact stiffness ratio has little effect on the rock breaking performance under water jet impact. |
| WOS研究方向 | Engineering ; Mathematics |
| 语种 | 英语 |
| WOS记录号 | WOS:000491217700041 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/14844]  |
| 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.Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan 430071, Hubei, Peoples R China 2.Wuhan Univ, Sch Civil Engn, Wuhan 430072, Hubei, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Wu, Zhijun,Yu, Fangzheng,Zhang, Penglin,et al. Micro-mechanism study on rock breaking behavior under water jet impact using coupled SPH-FEM/DEM method with Voronoi grains[J]. ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS,2019,108:472-483. |
| APA | Wu, Zhijun,Yu, Fangzheng,Zhang, Penglin,&Liu, Xuewei.(2019).Micro-mechanism study on rock breaking behavior under water jet impact using coupled SPH-FEM/DEM method with Voronoi grains.ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS,108,472-483. |
| MLA | Wu, Zhijun,et al."Micro-mechanism study on rock breaking behavior under water jet impact using coupled SPH-FEM/DEM method with Voronoi grains".ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS 108(2019):472-483. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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