Laboratory-scale instabilities characterized within a progressive shear-sliding failure via optical and acoustic emission techniques

Three successive instabilities are generated in a progressive shear-sliding failure under uniaxial compression. These instabilities show the distinctive acoustic emission (AE) features that display strong similarities with stick-slip experiments on core specimens. However, detailed AE and optical an...

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Main Author: Xiong, Qiquan
Other Authors: Zhao Zhiye
Format: Thesis-Doctor of Philosophy
Language:English
Published: Nanyang Technological University 2019
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Online Access:https://hdl.handle.net/10356/136509
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1365092020-10-28T08:40:50Z Laboratory-scale instabilities characterized within a progressive shear-sliding failure via optical and acoustic emission techniques Xiong, Qiquan Zhao Zhiye School of Civil and Environmental Engineering CZZHAO@ntu.edu.sg Engineering::Civil engineering Three successive instabilities are generated in a progressive shear-sliding failure under uniaxial compression. These instabilities show the distinctive acoustic emission (AE) features that display strong similarities with stick-slip experiments on core specimens. However, detailed AE and optical analyses reveal the differences: (1) AE features are divided into two groups: fault-development and fault-slip. The former is similar to AE features from an intact rock, while the latter is similar to tectonic-scale seismic activities; (2) optical observations display a series of phenomena that also can be categorized as: fault-development includes fault initiation, its widening and fully-development, off-fault crack development; fault-slip involves creation and growth of marble powder gouge in the fault, and migration of brightening grains along the fault. Thus, the discovery from the study is the first and second instabilities are two different stages during the fault-development, and only the third instability represents the actual stick-slip along a well-formed fault. Doctor of Philosophy 2019-12-20T07:56:08Z 2019-12-20T07:56:08Z 2019 Thesis-Doctor of Philosophy Xiong, Q. (2019). Laboratory-scale instabilities characterized within a progressive shear-sliding failure via optical and acoustic emission techniques. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/136509 10.32657/10356/136509 en application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Civil engineering
spellingShingle Engineering::Civil engineering
Xiong, Qiquan
Laboratory-scale instabilities characterized within a progressive shear-sliding failure via optical and acoustic emission techniques
description Three successive instabilities are generated in a progressive shear-sliding failure under uniaxial compression. These instabilities show the distinctive acoustic emission (AE) features that display strong similarities with stick-slip experiments on core specimens. However, detailed AE and optical analyses reveal the differences: (1) AE features are divided into two groups: fault-development and fault-slip. The former is similar to AE features from an intact rock, while the latter is similar to tectonic-scale seismic activities; (2) optical observations display a series of phenomena that also can be categorized as: fault-development includes fault initiation, its widening and fully-development, off-fault crack development; fault-slip involves creation and growth of marble powder gouge in the fault, and migration of brightening grains along the fault. Thus, the discovery from the study is the first and second instabilities are two different stages during the fault-development, and only the third instability represents the actual stick-slip along a well-formed fault.
author2 Zhao Zhiye
author_facet Zhao Zhiye
Xiong, Qiquan
format Thesis-Doctor of Philosophy
author Xiong, Qiquan
author_sort Xiong, Qiquan
title Laboratory-scale instabilities characterized within a progressive shear-sliding failure via optical and acoustic emission techniques
title_short Laboratory-scale instabilities characterized within a progressive shear-sliding failure via optical and acoustic emission techniques
title_full Laboratory-scale instabilities characterized within a progressive shear-sliding failure via optical and acoustic emission techniques
title_fullStr Laboratory-scale instabilities characterized within a progressive shear-sliding failure via optical and acoustic emission techniques
title_full_unstemmed Laboratory-scale instabilities characterized within a progressive shear-sliding failure via optical and acoustic emission techniques
title_sort laboratory-scale instabilities characterized within a progressive shear-sliding failure via optical and acoustic emission techniques
publisher Nanyang Technological University
publishDate 2019
url https://hdl.handle.net/10356/136509
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