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Investigation of Multiscale Failure Mechanism of Red Bed Soft Rock using Grain-Based Finite-Discrete Element Method Combined with X-Ray Micro-computerized Tomography

文献类型：期刊论文

作者Liu, Chi1,2; Liu, Xiaoli1; Wu, Chunlu1; Wang, Enzhi1; Wang, Sijing1,3; Peng, Haoyang4
刊名KSCE JOURNAL OF CIVIL ENGINEERING
出版日期2023-01-24
页码18
ISSN号1226-7988
关键词Red bed soft rock Micro-CT SEM GB-FDEM Multi-scale failure mechanism
DOI10.1007/s12205-023-1445-6
英文摘要The mechanical properties and failure mechanisms of geomaterials are greatly affected by their heterogeneity. As a special complex rock medium, the mechanical response of red bed soft rock is of considerable importance in stability analyses and the protection of slopes. In this study, X-ray micro-computerized tomography (micro-CT) was used to obtain the spatial distribution of minerals in red bed soft rock. An image processing procedure was proposed to incorporate the extracted mesoscopic mineral and crack distribution into the model of the grain-based finite-discrete element method (GB-FDEM). Subsequently, a uniaxial compression test and Brazilian disc splitting test were performed to obtain the mechanical response and failure modes of mudstone. The microscopic fracture morphology and traces of intragranular and intergranular cracks under tensile and shear stress were analyzed in detail. The numerical results show that the GB-FDEM model successfully characterized the mechanical response, which was similar to that of the laboratory tests and the traditional homogeneous models. The presence of minerals and pre-existing cracks disturbed the stress distribution in the heterogeneous model, which resulted in a difference in local stress that reasonably explained the phenomenon of local fragmentation. The simulated macroscopic failure mode of the heterogeneous models was most consistent with the results of the laboratory tests. The systematic framework proposed in this study provides a powerful tool for further understanding the multiscale (micro, meso, and macro) failure mechanism of red bed soft rock and predicting a realistic fracture process while reducing the tedious and redundant laboratory tests.
WOS关键词DISCONTINUITY EMBEDDED APPROACH ; LABORATORY-SCALE ; COMPRESSIVE FAILURE ; FRACTURE-TOUGHNESS ; STABILITY ANALYSIS ; CRACK-PROPAGATION ; MESHFREE METHOD ; INTACT ROCK ; BEHAVIOR ; SIMULATION
资助项目National Key Ramp;D Program of China[2018YFC1504902] ; National Natural Science Foundation of China[51522903] ; National Natural Science Foundation of China[41772246] ; State Key Laboratory of Hydroscience and Hydraulic Engineering[2019-KY-03]
WOS研究方向Engineering
语种英语
出版者KOREAN SOCIETY OF CIVIL ENGINEERS-KSCE
WOS记录号WOS:000919953200005
资助机构National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Hydroscience and Hydraulic Engineering ; State Key Laboratory of Hydroscience and Hydraulic Engineering ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Hydroscience and Hydraulic Engineering ; State Key Laboratory of Hydroscience and Hydraulic Engineering ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Hydroscience and Hydraulic Engineering ; State Key Laboratory of Hydroscience and Hydraulic Engineering ; National Key Ramp;D Program of China ; National Key Ramp;D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Hydroscience and Hydraulic Engineering ; State Key Laboratory of Hydroscience and Hydraulic Engineering
源URL[http://ir.iggcas.ac.cn/handle/132A11/106861]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Liu, Chi
作者单位1.Chinese Inst Coal Sci, Deep Min & Rock Burst Res Branch, Beijing 100013, Peoples R China
2.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
4.Yalong River Hydropower Dev Co Ltd, Chengdu 610051, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Chi,Liu, Xiaoli,Wu, Chunlu,et al. Investigation of Multiscale Failure Mechanism of Red Bed Soft Rock using Grain-Based Finite-Discrete Element Method Combined with X-Ray Micro-computerized Tomography[J]. KSCE JOURNAL OF CIVIL ENGINEERING,2023:18.
APA Liu, Chi,Liu, Xiaoli,Wu, Chunlu,Wang, Enzhi,Wang, Sijing,&Peng, Haoyang.(2023).Investigation of Multiscale Failure Mechanism of Red Bed Soft Rock using Grain-Based Finite-Discrete Element Method Combined with X-Ray Micro-computerized Tomography.KSCE JOURNAL OF CIVIL ENGINEERING,18.
MLA Liu, Chi,et al."Investigation of Multiscale Failure Mechanism of Red Bed Soft Rock using Grain-Based Finite-Discrete Element Method Combined with X-Ray Micro-computerized Tomography".KSCE JOURNAL OF CIVIL ENGINEERING (2023):18.

入库方式： OAI收割

来源：地质与地球物理研究所

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