Mode I fracture behavior of heterogeneous granite: Insights from grain-based FDEM modelling
文献类型：期刊论文
| 作者 | Zhang, Shirui2,3; Qiu, Shili2; Li, Ping4; Kou, Yongyuan1; Xie, Zhenkun2,3; Jia, Lexin2,3 |
| 刊名 | ENGINEERING FRACTURE MECHANICS
 |
| 出版日期 | 2023-05-19 |
| 卷号 | 284期号:-页码:- |
| ISSN号 | 0013-7944 |
| 关键词 | Semi -circular bending Fracture behavior Breakable grain -based model Fracture process zone Fracture toughness |
| 英文摘要 | The failure of brittle rock has a significant influence on engineering stability. The purpose of this study is to understand the progressive fracture mechanism of heterogeneous granite from a mesoscopic perspective. In the present work, the fracture process zone (FPZ) model is used to characterize the constitutive relationship of rock cracking in the combined finite-discrete element method (FDEM). Moreover, the breakable grain-based model (bGBM) is established to study the fracture behavior of granite via the semi-circular bending (SCB) tests. To rebuild the mesostructure of granite specimens, an algorithm that considers the mesoscopic grain geometry characteristics and grain contact mechanical properties is utilized. Then, three classic examples, namely, a uniaxial compressive test, a Brazilian splitting test and a semi-circular bending test, are investigated with the numerical model. A good agreement of the load-displacement curves and crack propagation paths can be found between the simulation and laboratory tests. The mesoheterogeneity of granite cause the macroscopic fracture surface of the slit tip to be nearly upright, with local roughness and zigzag. The slit length has a significant effect on the damage distribution range of the SCB specimen, and the peak load and mode I fracture toughness decreases with increasing slit length and supporting span. The accurate measurement of the mode I fracture toughness of SCB specimens needs to consider the FPZ, and the average increment is 39% and 41% under different slit length and supporting span conditions, respectively. |
| 学科主题 | Mechanics |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000984144400001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35288]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.No. 2 Mining Area Jinchuan Group Co. Ltd., Jinchang 737100, China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 3.University of Chinese Academy of Sciences, Beijing 100049, China 4.College of Resources and Environmental Science, South-Central Minzu University, Wuhan 430074, China |
| 推荐引用方式 GB/T 7714 | Zhang, Shirui,Qiu, Shili,Li, Ping,et al. Mode I fracture behavior of heterogeneous granite: Insights from grain-based FDEM modelling[J]. ENGINEERING FRACTURE MECHANICS,2023,284(-):-. |
| APA | Zhang, Shirui,Qiu, Shili,Li, Ping,Kou, Yongyuan,Xie, Zhenkun,&Jia, Lexin.(2023).Mode I fracture behavior of heterogeneous granite: Insights from grain-based FDEM modelling.ENGINEERING FRACTURE MECHANICS,284(-),-. |
| MLA | Zhang, Shirui,et al."Mode I fracture behavior of heterogeneous granite: Insights from grain-based FDEM modelling".ENGINEERING FRACTURE MECHANICS 284.-(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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