Modelling dynamic fracture and fragmentation of rocks under multiaxial coupled static and dynamic loads with a parallelised 3D FDEM
文献类型：期刊论文
| 作者 | Han, Haoyu1,5; Fukuda, Daisuke6; Liu, Hongyuan1; Zhang, Qianbing2; Zhao, Jian2; Wu, Di3,4,6; Chan, Andrew1 |
| 刊名 | COMPUTERS AND GEOTECHNICS
 |
| 出版日期 | 2024-08-01 |
| 卷号 | 172页码:22 |
| 关键词 | FDEM Tri-HB Dynamic fracture Rock fragmentation Multiaxial coupled static and dynamic loads |
| ISSN号 | 0266-352X |
| DOI | 10.1016/j.compgeo.2024.106483 |
| 英文摘要 | In this study, a three-dimensional (3D) combined finite-discrete element method (FDEM) based simulator, which enables the robust simulation of full-scale triaxial Hopkinson bar (Tri-HB) testing system, including the capture of fracture and fragmentation processes of rock specimens as well as the detection and analysis of generated rock fragments, is developed for investigating the dynamic responses of rocks subjected to multiaxial coupled static and dynamic loads. An innovative two-step approach is proposed to first efficiently achieve the static stress state in the entire Tri-HB system and then apply dynamic loading to the system. The proposed approach with the schemes of mass scaling and local damping can significantly reduce the run time for static computation involving cohesive elements and complex contact mechanics in the framework of explicit time-integration. The developed program is well validated by achieving dynamic stress equilibrium in the Tri-HB system and comparing the simulated stress wave profiles with those from laboratory experiments. Then, the progressive dynamic fracture and fragmentation processes of rocks under different static stress conditions in a full-scale Tri-HB system are investigated, which vividly exhibit the confinement dependence of the dynamic behaviours of rocks in the testing system. It is found that, even with the same loading rate, separate input parameter sets for rock need to be established in FDEM for different confinement conditions to capture the actual rate dependent behaviour of rock. Further studies are also conducted to investigate the effect of interfacial friction on the fracture behaviour, and the results indicate that higher interfacial frictions significantly disturb the dynamic stress variations and the true rock behaviour in the system. Through high performance computing of 3D FDEM, this study is expected to contribute to the understanding of dynamic responses of rocks subjected to multiaxial coupled static and dynamic loads in deep underground engineering. |
| 资助项目 | JSPS KAKENHI[22K04996] |
| WOS研究方向 | Computer Science ; Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001250002100001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41747]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Fukuda, Daisuke; Liu, Hongyuan |
| 作者单位 | 1.Univ Tasmania, Sch Engn, Hobart, Tas 7001, Australia 2.Monash Univ, Dept Civil Engn, Melbourne, Vic 3800, Australia 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Yunnan Univ, Dept Civil Engn, Kunming 650504, Peoples R China 6.Hokkaido Univ, Fac Engn, Hokkaido 0608628, Japan |
| 推荐引用方式 GB/T 7714 | Han, Haoyu,Fukuda, Daisuke,Liu, Hongyuan,et al. Modelling dynamic fracture and fragmentation of rocks under multiaxial coupled static and dynamic loads with a parallelised 3D FDEM[J]. COMPUTERS AND GEOTECHNICS,2024,172:22. |
| APA | Han, Haoyu.,Fukuda, Daisuke.,Liu, Hongyuan.,Zhang, Qianbing.,Zhao, Jian.,...&Chan, Andrew.(2024).Modelling dynamic fracture and fragmentation of rocks under multiaxial coupled static and dynamic loads with a parallelised 3D FDEM.COMPUTERS AND GEOTECHNICS,172,22. |
| MLA | Han, Haoyu,et al."Modelling dynamic fracture and fragmentation of rocks under multiaxial coupled static and dynamic loads with a parallelised 3D FDEM".COMPUTERS AND GEOTECHNICS 172(2024):22. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。