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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| Other Authors: | |
| Format: | Thesis-Doctor of Philosophy |
| Language: | English |
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Nanyang Technological University
2019
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| Online Access: | https://hdl.handle.net/10356/136509 |
| _version_ | 1811682047100452864 |
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| author | Xiong, Qiquan |
| author2 | Zhao Zhiye |
| author_facet | Zhao Zhiye Xiong, Qiquan |
| author_sort | Xiong, Qiquan |
| collection | NTU |
| 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. |
| first_indexed | 2024-10-01T03:50:37Z |
| format | Thesis-Doctor of Philosophy |
| id | ntu-10356/136509 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:50:37Z |
| publishDate | 2019 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-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 |
| spellingShingle | Engineering::Civil engineering Xiong, Qiquan Laboratory-scale instabilities characterized within a progressive shear-sliding failure via optical and acoustic emission techniques |
| title | 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_short | 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 |
| topic | Engineering::Civil engineering |
| url | https://hdl.handle.net/10356/136509 |
| work_keys_str_mv | AT xiongqiquan laboratoryscaleinstabilitiescharacterizedwithinaprogressiveshearslidingfailureviaopticalandacousticemissiontechniques |