Mechanical and Acoustic Responses of Brittle Geomaterials with a Hole under a Compressive Disturbance
The objective of this article was to investigate the acoustic emission (AE) precursor information and crack propagation mechanism of brittle granite specimens containing a hole under uniaxial compression using AE and digital image correlation (DIC) techniques. The results show that the existence of...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/5292925 |
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| author | Peng Li Yun-Quan Wu Ying Zhang |
| author_facet | Peng Li Yun-Quan Wu Ying Zhang |
| author_sort | Peng Li |
| collection | DOAJ |
| description | The objective of this article was to investigate the acoustic emission (AE) precursor information and crack propagation mechanism of brittle granite specimens containing a hole under uniaxial compression using AE and digital image correlation (DIC) techniques. The results show that the existence of the opening in the specimen leads to the degradation of the mechanical properties, and the stress-strain curve exhibits several stress drops. Each deformation stage of rock had different AE characteristics, so AE signals can be used to characterize the microscopic damage evolution of rock and predict the macroscopic failure process of the surrounding rock of the opening. The deformation field evolution process of the specimen containing an opening gradually develops from a uniform distribution to prominent local deformation, and the deformation of the local area near the opening is greater than that of other areas. The initiation of cracks begins around the opening, and the propagation of tensile cracks around the opening is primarily influenced by the nucleation and propagation in the strain localization area. The crack propagation evolution derived from DIC images can be combined with AE monitoring to accurately reveal the deformation and failure mechanism of the intact specimen containing an opening. |
| format | Article |
| id | doaj-art-c9f3bdc64da24068a7f07aa9b00faa0f |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-c9f3bdc64da24068a7f07aa9b00faa0f2025-02-03T01:24:46ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422021-01-01202110.1155/2021/52929255292925Mechanical and Acoustic Responses of Brittle Geomaterials with a Hole under a Compressive DisturbancePeng Li0Yun-Quan Wu1Ying Zhang2School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaThe objective of this article was to investigate the acoustic emission (AE) precursor information and crack propagation mechanism of brittle granite specimens containing a hole under uniaxial compression using AE and digital image correlation (DIC) techniques. The results show that the existence of the opening in the specimen leads to the degradation of the mechanical properties, and the stress-strain curve exhibits several stress drops. Each deformation stage of rock had different AE characteristics, so AE signals can be used to characterize the microscopic damage evolution of rock and predict the macroscopic failure process of the surrounding rock of the opening. The deformation field evolution process of the specimen containing an opening gradually develops from a uniform distribution to prominent local deformation, and the deformation of the local area near the opening is greater than that of other areas. The initiation of cracks begins around the opening, and the propagation of tensile cracks around the opening is primarily influenced by the nucleation and propagation in the strain localization area. The crack propagation evolution derived from DIC images can be combined with AE monitoring to accurately reveal the deformation and failure mechanism of the intact specimen containing an opening.http://dx.doi.org/10.1155/2021/5292925 |
| spellingShingle | Peng Li Yun-Quan Wu Ying Zhang Mechanical and Acoustic Responses of Brittle Geomaterials with a Hole under a Compressive Disturbance Advances in Materials Science and Engineering |
| title | Mechanical and Acoustic Responses of Brittle Geomaterials with a Hole under a Compressive Disturbance |
| title_full | Mechanical and Acoustic Responses of Brittle Geomaterials with a Hole under a Compressive Disturbance |
| title_fullStr | Mechanical and Acoustic Responses of Brittle Geomaterials with a Hole under a Compressive Disturbance |
| title_full_unstemmed | Mechanical and Acoustic Responses of Brittle Geomaterials with a Hole under a Compressive Disturbance |
| title_short | Mechanical and Acoustic Responses of Brittle Geomaterials with a Hole under a Compressive Disturbance |
| title_sort | mechanical and acoustic responses of brittle geomaterials with a hole under a compressive disturbance |
| url | http://dx.doi.org/10.1155/2021/5292925 |
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