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Heterogeneity induced strain localization in block-in-matrix-soils subjected to uniaxial loading using real-time CT scanning

文献类型：期刊论文

作者Wu, Yanfang2,3,4; Li, Xiao2,3,4; Zhang, Luqing2,3,4; Qi, Shengwen2,3,4; Zhou, Jian1; He, Jianming2,3,4; Zhang, Zhaobin3,4; Sun, Xiukuo2,3,4
刊名JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
出版日期2023-08-01
卷号15期号:8页码:1951-1959
关键词Image correlation algorithm Damage processing Real-time computed tomography (CT) imaging Rock block motion Uniaxial compression
ISSN号1674-7755
DOI10.1016/j.jrmge.2022.11.008
英文摘要Block-in-matrix-soils (bimsoils) are geological mixtures that have distinct structures consisting of relatively strong rock blocks and weak matrix soils. It is still a challenge to evaluate the mechanical behaviors of bimsoils because of the heterogeneity, chaotic structure, and lithological variability. As a result, only very limited laboratory studies have been reported on the evolution of their internal deformation. In this study, the deformation evolution of bimsoils under uniaxial loading is investigated using real-time X-ray computed tomography (CT) and image correlation algorithm (with a rock block percentage (RBP) of 40%). Three parameters, i.e. heterogeneity coefficient (K), correlation coefficient (CC), and standard deviation (STD) of displacement fields, are proposed to quantify the heterogeneity of the motion of the rock blocks and the progressive deformation of the bimsoils. Experimental results show that the rock blocks in bimsoils are prone to forming clusters with increasing loading, and the sliding surface goes around only one side of a cluster. Based on the movement of the rock blocks recorded by STD and CC, the progressive deformation of the bimsoils is quantitatively divided into three stages: initialization of the rotation of rock blocks, formation of rock block clusters, and formation of a shear band by rock blocks with significant rotation. Moreover, the experimental results demonstrate that the meso-motion of rock blocks controls the macroscopic mechanical properties of the samples. (C) 2023 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
WOS关键词RAY COMPUTED-TOMOGRAPHY ; STABILITY ANALYSIS ; ROCK MIXTURES ; MICROTOMOGRAPHY ; BIMROCKS ; FAILURE ; TESTS
资助项目National Natural Science Foundation of China[41972287] ; National Natural Science Foundation of China[42090023] ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0904]
WOS研究方向Engineering
语种英语
WOS记录号WOS:001070903400005
出版者SCIENCE PRESS
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP)
源URL[http://ir.iggcas.ac.cn/handle/132A11/110819]  
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Li, Xiao
作者单位1.Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Wu, Yanfang,Li, Xiao,Zhang, Luqing,et al. Heterogeneity induced strain localization in block-in-matrix-soils subjected to uniaxial loading using real-time CT scanning[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2023,15(8):1951-1959.
APA Wu, Yanfang.,Li, Xiao.,Zhang, Luqing.,Qi, Shengwen.,Zhou, Jian.,...&Sun, Xiukuo.(2023).Heterogeneity induced strain localization in block-in-matrix-soils subjected to uniaxial loading using real-time CT scanning.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,15(8),1951-1959.
MLA Wu, Yanfang,et al."Heterogeneity induced strain localization in block-in-matrix-soils subjected to uniaxial loading using real-time CT scanning".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 15.8(2023):1951-1959.

入库方式： OAI收割

来源：地质与地球物理研究所

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