Numerical investigation on quasi-dynamic behaviours of fractured rocks under uniaxial compression using new rate-dependent contact models
文献类型：期刊论文
| 作者 | Liu, Liwang4,5; Li, Haibo3,4 ; Wang, Mingyang2; Zhang, Guokai5; Sui, Yaguang1; Li, Xiaofeng3
|
| 刊名 | ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
 |
| 出版日期 | 2025-07-01 |
| 卷号 | 176页码:15 |
| 关键词 | Quasi-dynamic loads Rate-dependent contact models Fractured rocks Numerical simulations Uniaxial compressive behaviours |
| ISSN号 | 0955-7997 |
| DOI | 10.1016/j.enganabound.2025.106268 |
| 英文摘要 | The behaviour of fractured rocks under quasi-dynamic loads significantly influences the stability of rock engineering projects under dynamic disturbances. To account for strain rate effects, new rate-dependent contact models were proposed in this study. Then, numerical models of fractured rocks were generated for quasi-dynamic simulations under uniaxial compression, aiming to investigate the impacts of strain rate and fracture intensity. The results show that the contact models can effectively replicate the rate-dependent behaviours of uniaxial compressive strength (UCS), and an increasing strain rate would induce a rise in UCS of fractured rocks. Additionally, the number of microcracks initiated in rock matrix and fractures show increasing trends, resulting in the higher number of failure planes and more complex failure patterns as the strain rate increases. In contrast, UCS is negatively correlated with fracture intensity, and the intensity's increase enhances the complexity of failure patterns. Regarding microcracking behaviours, the number of microcracks in rock matrix decreases with increasing intensity, while the number of microcracks within fractures increases. Since the mechanical properties of rock matrix are stronger than those of fractures and the initiation of microcracks requires externally input energy, the variations of microcracking behaviours might be intrinsic mechanisms underlying the changes in UCS. |
| 资助项目 | Academy of Sciences[SKLGME023009] ; China Postdoctoral Science Foundation[2024M764225] ; Excellent Postdoctoral Program of Jiangsu Province[2024ZB339] |
| WOS研究方向 | Engineering ; Mathematics |
| 语种 | 英语 |
| WOS记录号 | WOS:001479966700001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35962]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zhang, Guokai; Li, Xiaofeng |
| 作者单位 | 1.Northwest Inst Nucl Technol, Xian 710024, Peoples R China 2.Army Engn Univ PLA, State Key Lab Disaster Prevent & Mitigat Explos &, Nanjing 210007, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn Safety, Wuhan 430071, Peoples R China 5.Nanjing Univ Sci & Technol, Sch Safety Sci & Engn, Nanjing 210094, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Liwang,Li, Haibo,Wang, Mingyang,et al. Numerical investigation on quasi-dynamic behaviours of fractured rocks under uniaxial compression using new rate-dependent contact models[J]. ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS,2025,176:15. |
| APA | Liu, Liwang,Li, Haibo,Wang, Mingyang,Zhang, Guokai,Sui, Yaguang,&Li, Xiaofeng.(2025).Numerical investigation on quasi-dynamic behaviours of fractured rocks under uniaxial compression using new rate-dependent contact models.ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS,176,15. |
| MLA | Liu, Liwang,et al."Numerical investigation on quasi-dynamic behaviours of fractured rocks under uniaxial compression using new rate-dependent contact models".ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS 176(2025):15. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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