| A strain-rate cohesive fracture model of rocks based on Lennard-Jones potential | |
Lin QD(林钦栋)1; Li SH(李世海)2,3 ; Gan, Yundan1; Feng C(冯春)2
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| Corresponding Author | Feng, Chun([email protected]) |
| Source Publication | ENGINEERING FRACTURE MECHANICS
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| 2022 | |
| Volume | 259Pages:21 |
| ISSN | 0013-7944 |
| Abstract | 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. |
| Keyword | Strain-rate effect Cohesive fracture model Lennard-Jones potential CDEM |
| DOI | 10.1016/j.engfracmech.2021.108126 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000729026400001 |
| WOS Keyword | DISCONTINUITY EMBEDDED APPROACH ; DYNAMIC FRACTURE ; ELEMENT ; PROPAGATION ; SIMULATION ; SANDSTONE ; EVOLUTION ; MARBLE ; ZONE ; CDEM |
| WOS Research Area | Mechanics |
| WOS Subject | Mechanics |
| Funding Project | National Key Research and Development Project of China ; Ministry of Science and Technology of China[2018YFC1505504] |
| Funding Organization | National Key Research and Development Project of China ; Ministry of Science and Technology of China |
| Classification | 二类/Q1 |
| Ranking | 1 |
| Contributor | Feng, Chun |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/87976 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Xian Modern Chem Res Inst, Xian 710065, Shaanxi, Peoples R China; 2.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Lin QD,Li SH,Gan, Yundan,et al. A strain-rate cohesive fracture model of rocks based on Lennard-Jones potential[J]. ENGINEERING FRACTURE MECHANICS,2022,259:21.Rp_Au:Feng, Chun |
| APA | 林钦栋,李世海,Gan, Yundan,&冯春.(2022).A strain-rate cohesive fracture model of rocks based on Lennard-Jones potential.ENGINEERING FRACTURE MECHANICS,259,21. |
| MLA | 林钦栋,et al."A strain-rate cohesive fracture model of rocks based on Lennard-Jones potential".ENGINEERING FRACTURE MECHANICS 259(2022):21. |
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| Jp2022FA590_2022_A s（7045KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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