Institutional Repository of Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences
| Mesoscopic damage mechanism and a constitutive model of shale using in-situ X-ray CT device | |
| Duan, Yongting1,2; Feng, Xia-Ting1,2; Li, Xiao3,4; Yang, Baicun5 | |
| 2022-06-15 | |
| Source Publication | ENGINEERING FRACTURE MECHANICS
 |
| ISSN | 0013-7944 |
| Volume | 269Pages:13 |
| Abstract | 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. |
| Keyword | Shale gas In-situ micro-CT Mesoscopic void Damage evolution Constitutive model |
| DOI | 10.1016/j.engfracmech.2022.108576 |
| Funding Organization | 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 |
| WOS Keyword | LONGMAXI FORMATION ; TOMOGRAPHY ; EVOLUTION ; FRACTURE ; CRACKING ; FAILURE |
| Language | 英语 |
| Funding Project | 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] |
| Funding Organization | 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 |
| WOS Research Area | Mechanics |
| WOS Subject | Mechanics |
| WOS ID | WOS:000833424000001 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.iggcas.ac.cn/handle/132A11/108465 |
| Collection | 页岩气与地质工程院重点实验室 |
| Corresponding Author | Duan, Yongting |
| Affiliation | 1.Northeastern Univ, Sch Resources & Civil Engn, Key Lab, Minist Educ Safe Min Deep Met Mines, Shenyang 110819, Peoples R China 2.Northeastern Univ, Key Lab Liaoning Prov Deep Engn & Intelligent Tec, Shenyang 110819, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China 5.Northeastern Univ, Sch Resources & Civil Engn, Shenyang 110819, Peoples R China |
| Recommended Citation 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. |
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