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Study on Acoustic Emission Characteristics and Damage Evolution Law of Shale under Uniaxial Compression

Investigating the correlation between acoustic emission (AE) parameters and damage mechanisms in rock mechanics can help understand rock damage evolution under loading and provide a theoretical basis for engineering support and safety detection. Therefore, this paper presents experimental works on t...

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Main Authors: Wu, Wenjie, Chan, Chee-Ming, Gu, Yilei, Su, Xiaopeng
Format: Article
Language:English
Published: Hindawi 2024
Subjects:
QE Geology
Online Access:http://eprints.uthm.edu.my/11909/1/J17605_43d86a8740026c23ca12fb281709e1d2.pdf
http://eprints.uthm.edu.my/11909/
https://doi.org/10.1155/2024/3076780
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spelling my.uthm.eprints.119092024-12-23T01:14:27Z http://eprints.uthm.edu.my/11909/ Study on Acoustic Emission Characteristics and Damage Evolution Law of Shale under Uniaxial Compression Wu, Wenjie Chan, Chee-Ming Gu, Yilei Su, Xiaopeng QE Geology Investigating the correlation between acoustic emission (AE) parameters and damage mechanisms in rock mechanics can help understand rock damage evolution under loading and provide a theoretical basis for engineering support and safety detection. Therefore, this paper presents experimental works on the correlation between AE and failure mechanisms of rock mass under uniaxial compression stress, with the aim of capturing the damage evolution leading to a new damage constitutive model. The experimental results indicate that the uniaxial compression process of shale can be divided into four stages according to AE characteristics. AE signals are minimal during the crack compaction and elastic stages. The crack initiation strength σci, which is approximately 55% of the uniaxial compressive strength, is identified when the cumulative AE counts and damage factor begin to increase slowly. When axial stress reaches the damage strength σcd, which is approximately 80% of the uniaxial compressive strength, a significant number of AE signals are generated. AE phenomena can be observed during the unstable crack development and post-crack stages. Considering the initial damage to the rock, the damage factor D initially decreases and then increases with increasing cumulative ring-down counts rather than exhibiting a monotonic increase. The damage factor D is proportional to the cumulative AE counts N in the stage before rock failure. Hindawi 2024 Article PeerReviewed text en http://eprints.uthm.edu.my/11909/1/J17605_43d86a8740026c23ca12fb281709e1d2.pdf Wu, Wenjie and Chan, Chee-Ming and Gu, Yilei and Su, Xiaopeng (2024) Study on Acoustic Emission Characteristics and Damage Evolution Law of Shale under Uniaxial Compression. Advances in Civil Engineering. pp. 1-10. https://doi.org/10.1155/2024/3076780
institution Universiti Tun Hussein Onn Malaysia
building UTHM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tun Hussein Onn Malaysia
content_source UTHM Institutional Repository
url_provider http://eprints.uthm.edu.my/
language English
topic QE Geology
spellingShingle QE Geology
Wu, Wenjie
Chan, Chee-Ming
Gu, Yilei
Su, Xiaopeng
Study on Acoustic Emission Characteristics and Damage Evolution Law of Shale under Uniaxial Compression
description Investigating the correlation between acoustic emission (AE) parameters and damage mechanisms in rock mechanics can help understand rock damage evolution under loading and provide a theoretical basis for engineering support and safety detection. Therefore, this paper presents experimental works on the correlation between AE and failure mechanisms of rock mass under uniaxial compression stress, with the aim of capturing the damage evolution leading to a new damage constitutive model. The experimental results indicate that the uniaxial compression process of shale can be divided into four stages according to AE characteristics. AE signals are minimal during the crack compaction and elastic stages. The crack initiation strength σci, which is approximately 55% of the uniaxial compressive strength, is identified when the cumulative AE counts and damage factor begin to increase slowly. When axial stress reaches the damage strength σcd, which is approximately 80% of the uniaxial compressive strength, a significant number of AE signals are generated. AE phenomena can be observed during the unstable crack development and post-crack stages. Considering the initial damage to the rock, the damage factor D initially decreases and then increases with increasing cumulative ring-down counts rather than exhibiting a monotonic increase. The damage factor D is proportional to the cumulative AE counts N in the stage before rock failure.
format Article
author Wu, Wenjie
Chan, Chee-Ming
Gu, Yilei
Su, Xiaopeng
author_facet Wu, Wenjie
Chan, Chee-Ming
Gu, Yilei
Su, Xiaopeng
author_sort Wu, Wenjie
title Study on Acoustic Emission Characteristics and Damage Evolution Law of Shale under Uniaxial Compression
title_short Study on Acoustic Emission Characteristics and Damage Evolution Law of Shale under Uniaxial Compression
title_full Study on Acoustic Emission Characteristics and Damage Evolution Law of Shale under Uniaxial Compression
title_fullStr Study on Acoustic Emission Characteristics and Damage Evolution Law of Shale under Uniaxial Compression
title_full_unstemmed Study on Acoustic Emission Characteristics and Damage Evolution Law of Shale under Uniaxial Compression
title_sort study on acoustic emission characteristics and damage evolution law of shale under uniaxial compression
publisher Hindawi
publishDate 2024
url http://eprints.uthm.edu.my/11909/1/J17605_43d86a8740026c23ca12fb281709e1d2.pdf
http://eprints.uthm.edu.my/11909/
https://doi.org/10.1155/2024/3076780
_version_ 1819912400725344256
score 13.223943

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