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Rate-Dependent Characteristics of Damage and Roughness Degradation of Three-Dimensional Artificial Joint Surfaces

文献类型：期刊论文

作者Shen, Hui1,2; Liu, Yaqun1,2; Li, Haibo1,2; Wu, Duohua1,2; Xia, Xiang1,2; Liu, Bo1,2; Yu, Chong1,2
刊名ROCK MECHANICS AND ROCK ENGINEERING
出版日期2022-01-17
页码17
关键词Shear velocity Joint surface Damage evolution 3D joint roughness parameter Roughness degradation
ISSN号0723-2632
DOI10.1007/s00603-022-02770-6
英文摘要A series of direct shear tests on specimens with artificial joints were performed to investigate the rate-dependent characteristics of damage and roughness degradation of three-dimensional joint surfaces under different normal stresses and shear velocities. A novel method was proposed to identify and extract the damaged area of joint surfaces based on the combination of the three-dimensional scanning technology and the color image segmentation method. Based on the proposed method, two main failure modes were identified on the joint surface, including asperity wear and debris backfilling. By controlling different shear displacements and shear velocities, the rate-dependent damage evolution of the joint surface during shearing was revealed. Four damage states are defined to better understand the local damage mechanism of joints. The statistical results indicate that the damage area ratio increases with increasing normal stress and shear velocity. The damage develops more rapidly at a higher shear velocity during progressive shearing. Furthermore, the three-dimensional roughness parameter theta(max)*/(C + 1) is measured in 36 analysis directions on the sheared joint surfaces to quantitatively describe the asperity degradation. It is observed that the average roughness parameter increases with increasing shear velocity under the same normal stress but decreases with increasing shear displacement. The results in the present study may provide some references for revealing the mechanical behavior and damage state of joints subjected to dynamic loads.
资助项目National Natural Science Foundation of China[51679231] ; National Natural Science Foundation of China[51439008]
WOS研究方向Engineering ; Geology
语种英语
WOS记录号WOS:000743407300001
出版者SPRINGER WIEN
源URL[http://119.78.100.198/handle/2S6PX9GI/30784]  
专题中科院武汉岩土力学所
通讯作者Liu, Yaqun
作者单位1.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech, Wuhan 430071, Hubei, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Shen, Hui,Liu, Yaqun,Li, Haibo,et al. Rate-Dependent Characteristics of Damage and Roughness Degradation of Three-Dimensional Artificial Joint Surfaces[J]. ROCK MECHANICS AND ROCK ENGINEERING,2022:17.
APA Shen, Hui.,Liu, Yaqun.,Li, Haibo.,Wu, Duohua.,Xia, Xiang.,...&Yu, Chong.(2022).Rate-Dependent Characteristics of Damage and Roughness Degradation of Three-Dimensional Artificial Joint Surfaces.ROCK MECHANICS AND ROCK ENGINEERING,17.
MLA Shen, Hui,et al."Rate-Dependent Characteristics of Damage and Roughness Degradation of Three-Dimensional Artificial Joint Surfaces".ROCK MECHANICS AND ROCK ENGINEERING (2022):17.

入库方式： OAI收割

来源：武汉岩土力学研究所

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