A strain-rate cohesive fracture model of rocks based on Lennard-Jones potential
文献类型：期刊论文
| 作者 | Lin, Qindong3; Li, Shihai1,2; Gan, Yundan3; Feng, Chun2; Feng C(冯春) ; Li SH(李世海)
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| 刊名 | ENGINEERING FRACTURE MECHANICS
 |
| 出版日期 | 2022 |
| 卷号 | 259页码:21 |
| 关键词 | Strain-rate effect Cohesive fracture model Lennard-Jones potential CDEM |
| ISSN号 | 0013-7944 |
| DOI | 10.1016/j.engfracmech.2021.108126 |
| 通讯作者 | Feng, Chun(fengchun@imech.ac.cn) |
| 英文摘要 | To characterize the dynamic mechanical response of rocks during the initiation and propagation of cracks at a high strain rate, a strain-rate cohesive fracture model is established based on the Lennard-Jones potential and multi-scale model of rocks. The newly proposed model explains the micro-mechanism of strain rate effect from the molecular scale and establishes the potential energy function and force function. First, it is proposed that the strain rate effect arises due to the change of microscopic properties of molecules at a high strain rate. Thereafter, the potential energy function and force function of the strain-rate cohesive fracture model corresponding to the dynamic tensile and shear processes are established. Finally, the accuracy of the strain-rate cohesive fracture model is verified through numerical simulations. The results indicate that the strain-rate cohesive fracture model can accurately simulate the dynamic tensile failure and shear failure of rocks at different strain rates. The dynamic tensile strength, dynamic compressive strength, and dynamic tensile fracture energy obtained by numerical simulations and laboratory tests are similar. |
| WOS关键词 | DISCONTINUITY EMBEDDED APPROACH ; DYNAMIC FRACTURE ; ELEMENT ; PROPAGATION ; SIMULATION ; SANDSTONE ; EVOLUTION ; MARBLE ; ZONE ; CDEM |
| 资助项目 | National Key Research and Development Project of China ; Ministry of Science and Technology of China[2018YFC1505504] |
| WOS研究方向 | Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:000729026400001 |
| 资助机构 | National Key Research and Development Project of China ; Ministry of Science and Technology of China |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/87975]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 通讯作者 | Feng, Chun |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China 3.Xian Modern Chem Res Inst, Xian 710065, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lin, Qindong,Li, Shihai,Gan, Yundan,et al. A strain-rate cohesive fracture model of rocks based on Lennard-Jones potential[J]. ENGINEERING FRACTURE MECHANICS,2022,259:21. |
| APA | Lin, Qindong,Li, Shihai,Gan, Yundan,Feng, Chun,冯春,&李世海.(2022).A strain-rate cohesive fracture model of rocks based on Lennard-Jones potential.ENGINEERING FRACTURE MECHANICS,259,21. |
| MLA | Lin, Qindong,et al."A strain-rate cohesive fracture model of rocks based on Lennard-Jones potential".ENGINEERING FRACTURE MECHANICS 259(2022):21. |
入库方式： OAI收割
来源：力学研究所
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