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Mesoscopic damage mechanism and a constitutive model of shale using in-situ X-ray CT device

文献类型：期刊论文

作者Duan, Yongting4,5; Feng, Xia-Ting4,5; Li, Xiao2,3; Yang, Baicun1
刊名ENGINEERING FRACTURE MECHANICS
出版日期2022-06-15
卷号269页码:13
关键词Shale gas In-situ micro-CT Mesoscopic void Damage evolution Constitutive model
ISSN号0013-7944
DOI10.1016/j.engfracmech.2022.108576
英文摘要With the continuous development of shale gas engineering in China, an accurate and adequate understanding of shale damage mechanism has become a critical scientific problem addressed by rock mechanics. So far, many researchers have studied the fracturing process and mechanism of shale in multi-scales. The mesoscopic structural characteristics of shale during loading can be obtained using the in-situ X-ray computed tomography (CT) technology. Some scholars have observed the structure evolution of shale under in-situ uniaxial compression conditions, but the quantitative investigation of damage evolution and constitutive model of shale still requires further studies. Given this, the in-situ micro-CT device was adopted to study the macroscopic mechanical response and the mesoscopic structural evolution of Longmaxi shale under uniaxial compression conditions. The evolution law of the damage variable with the axial strain was analysed according to the characterisation of the damage variable based on the CT image grey variance. In combination with the macroscopic stress-strain curve shape, evolution stage of the mesoscopic void, evolution of the damage variable, mesoscopic mechanism of the macroscopic mechanical response was investigated, and a damage constitutive model of shale under the uniaxial compression test was proposed. The conclusion of this study can provide a foundation for further research into the multi-scale failure mechanism of shale and exert theoretical guidance significance on shale gas fracturing engineering practice.
WOS关键词LONGMAXI FORMATION ; TOMOGRAPHY ; EVOLUTION ; FRACTURE ; CRACKING ; FAILURE
资助项目National Natural Science Foundation of China[42102309] ; National Natural Science Foundation of China[42007243] ; National Natural Science Foundation of China[41227901] ; Fundamental Research Funds for the Central Universities[N2101032] ; China Postdoctoral Science Foundation[2021M690562]
WOS研究方向Mechanics
语种英语
WOS记录号WOS:000833424000001
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
源URL[http://ir.iggcas.ac.cn/handle/132A11/108465]  
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Duan, Yongting
作者单位1.Northeastern Univ, Sch Resources & Civil Engn, Shenyang 110819, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
4.Northeastern Univ, Key Lab Liaoning Prov Deep Engn & Intelligent Tec, Shenyang 110819, Peoples R China
5.Northeastern Univ, Sch Resources & Civil Engn, Key Lab, Minist Educ Safe Min Deep Met Mines, Shenyang 110819, Peoples R China
推荐引用方式
GB/T 7714		 Duan, Yongting,Feng, Xia-Ting,Li, Xiao,et al. Mesoscopic damage mechanism and a constitutive model of shale using in-situ X-ray CT device[J]. ENGINEERING FRACTURE MECHANICS,2022,269:13.
APA Duan, Yongting,Feng, Xia-Ting,Li, Xiao,&Yang, Baicun.(2022).Mesoscopic damage mechanism and a constitutive model of shale using in-situ X-ray CT device.ENGINEERING FRACTURE MECHANICS,269,13.
MLA Duan, Yongting,et al."Mesoscopic damage mechanism and a constitutive model of shale using in-situ X-ray CT device".ENGINEERING FRACTURE MECHANICS 269(2022):13.

入库方式： OAI收割

来源：地质与地球物理研究所

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