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《Chinese Journal of Rock Mechanics and Engineering》 2015-06
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STRESSES FOR CRACK CLOSURE AND ITS APPLICATION TO ASSESSING STRESS-INDUCED MICROCRACK DAMAGE

PENG Jun;CAI Ming;RONG Guan;ZHOU Chuangbing;ZHAO Xingguang;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University;School of Engineering,Laurentian University;School of Civil Engineering and Architecture,Nanchang University;Beijing Research Institute of Uranium Geology;  
Several important stress thresholds,termed as the crack closure stress,the crack initiation stress,the crack damage stress and the peak stress,can be identified from the progressive failure process of brittle rocks. The crack closure stress and its relationship with the stress-induced microcrack damage were studied. Firstly,various methods that have been proposed for identifying the crack closure stress were reviewed,and a new method,called as axial strain response(ASR) method,was proposed. An attractive feature of the proposed method is that it does not require subjective interpretation from the user and can be easily programmed. Secondly, the method was verified using the test data from uniaxial and triaxial compression tests. The crack closure stress determined from the ASR method was comparable with that from other methods in unconfined and confined conditions, which validated the proposed ASR method. Finally, the crack closure stress was used to evaluate the stress-induced microcrack damage of three types of rock from Forsmark and Oskarshamn sites,Sweden. By correlating the crack closure stress with the sampling depth,it was found that the crack closure stresses varied with the sampling depth.At the shallow depth,the crack closure stress increases roughly linearly with depth increasing. However,at greater depth,the crack closure stress is more or less constant. A linear relationship between the crack closure stress and thedifference of in-situ stress was also observed,indicating that the magnitude of the difference of in-situ stress may be a key factor that dictated the amount of stress-induced microcracks in the rock.
【Fund】: 国家重点基础研究发展计划(973)项目(2011CB013501 2010CB732005);; 教育部新世纪优秀人才计划项目(NCET–11–0406)
【CateGory Index】: TU45
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【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 WANG Li,MAO Yuan-chun,YE Jin-sheng,YANG Jian-hui,RUI Da-hu(Department of Civil Engineering of Henan Polytechnic University,Jiaozuo 454000,China);MODELS FOR MICROCRACKS EXTENSION AND DAMAGE EVOLUTION BASED ON NUMBER SERIES OF MICRODEFECTS NUCLEATION[J];Engineering Mechanics;2013-08
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5 LIU Pei-Xun;CHEN Shun-Yun;GUO Yan-Shuang;LI Pu-Chun;State Key Laboratory of Earthquake Dynamics,Institute of Geology,China Earthquake Administration;Xiamen Research Center of Seismology Survey;;Moment tensor inversion of acoustic emission[J];Chinese Journal of Geophysics;2014-03
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9 R.Gholam;A.Moradzadeh;V.Rasoul;J.Hanach;Department of Mining, Petroleum and Geophysics, Shahrood University of Technology;Departmentof Petroleum Engineering, Curtin University;Geological Division, Iranian Offshore Oilfield Company;;Practical application of failure criteria in determining safe mud weight windows in drilling operations[J];岩石力学与岩土工程学报(英文版);2014-01
10 JIA Li-chun;CHEN Mian;ZHANG Wei;ZHU Qian-qian;JIN Yan;China University ofPetroleum,State Key Laboratory of Petroleum Resource and Prospecting;;Experimental Study on Rock Mechanics of Volcanic Rock[J];Science Technology and Engineering;2014-05
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1 QIU Yi-ping;LIN Zhuo-ying;School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University;;Correlation between Crack Initiation Stress Level and Brittleness Index[A];[C];2014
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3 Lei Xue;Siqing Qin;Pei Li;Guoliang Li;Ibrahim Adewuyi Oyediran;Xiaohua Pan;Key Laboratory of Shale Gas and Geoengineering Institute of Geology and Geophysics,Chinese Academy of Sciences;Key Laboratory of Engineering Geomechanics,Institute of Geology and Geophysics,Chinese Academy of Sciences;Department of Geology,Faculty of Science,University of Ibadan;College of Civil Engineering and Architecture,Zhejiang University;;New quantitative displacement criteria for slope deformation process:From the onset of the accelerating creep to brittle rupture and final failure[A];[C];2015
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