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Mechanical Properties and Acoustic Emission Characteristics of Karst Limestone under Uniaxial Compression
Joint Authors
Chen, Jianxun
Luo, Yanbin
Li, Yao
Guo, Jiaqi
Wang, Qingsong
Liu, Qin
Wang, Hongyu
Source
Advances in Materials Science and Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-07-12
Country of Publication
Egypt
No. of Pages
14
Abstract EN
Firstly, I-RPT ultrasonic detector was used to test the wave velocity of karst limestone with different initial microstructure and water content.
Then, RMT-150B rock testing machine and DS2-16B acoustic emission system were used to test the acoustic emission (AE) under uniaxial compression.
Mechanical properties and AE characteristics were obtained during rock failure.
The detailed relationship between stress-strain and AE characteristics was studied in this paper.
Research results indicated the following: (1) For samples with many primary fissures and defects, wave velocity in dry state was larger than that in its natural state.
From natural state to saturated state, the wave velocity tended to increase.
For samples with good integrity, wave velocity increased with increasing of water content.
(2) In the dry state, the samples presented tension failure.
In saturated state, the samples presented tension-shear failure.
For samples with cracks and good integrity, samples showed brittle failure.
For samples with many corrosion pores which showed ductile damage under natural and saturated state, the spalling phenomenon was enhanced under saturated state.
(3) With increasing of water content, the peak stress and AE peak reduced dramatically.
In brittle failure, AE peak could be considered a sign of failure.
In ductile failure, AE activity decreased gradually with the decrease of stress.
(4) The mechanical properties and AE characteristics corresponding to four main fracture propagation types were also discussed.
American Psychological Association (APA)
Chen, Jianxun& Wang, Qingsong& Guo, Jiaqi& Luo, Yanbin& Li, Yao& Liu, Qin…[et al.]. 2018. Mechanical Properties and Acoustic Emission Characteristics of Karst Limestone under Uniaxial Compression. Advances in Materials Science and Engineering،Vol. 2018, no. 2018, pp.1-14.
https://search.emarefa.net/detail/BIM-1120073
Modern Language Association (MLA)
Chen, Jianxun…[et al.]. Mechanical Properties and Acoustic Emission Characteristics of Karst Limestone under Uniaxial Compression. Advances in Materials Science and Engineering No. 2018 (2018), pp.1-14.
https://search.emarefa.net/detail/BIM-1120073
American Medical Association (AMA)
Chen, Jianxun& Wang, Qingsong& Guo, Jiaqi& Luo, Yanbin& Li, Yao& Liu, Qin…[et al.]. Mechanical Properties and Acoustic Emission Characteristics of Karst Limestone under Uniaxial Compression. Advances in Materials Science and Engineering. 2018. Vol. 2018, no. 2018, pp.1-14.
https://search.emarefa.net/detail/BIM-1120073
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1120073