Simulation of the Fracturing Process of Inclusions Embedded in Rock Matrix under Compression
Typical parallel fractures are often observed in the outcrops of inclusions in the field. To reveal the failure mechanism of inclusions embedded in rock matrix, a series of heterogeneous models are established and tested based on the damage mechanics, statistical strength theory, and continuum mecha...
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| Format: | Article |
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MDPI AG
2022-08-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/16/8041 |
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| author | Chaoyun Yu Bin Gong Na Wu Penglei Xu Xiankai Bao |
| author_facet | Chaoyun Yu Bin Gong Na Wu Penglei Xu Xiankai Bao |
| author_sort | Chaoyun Yu |
| collection | DOAJ |
| description | Typical parallel fractures are often observed in the outcrops of inclusions in the field. To reveal the failure mechanism of inclusions embedded in rock matrix, a series of heterogeneous models are established and tested based on the damage mechanics, statistical strength theory, and continuum mechanics. The results show that, with the spacing between two adjacent fractures decreasing, the stress is firstly transferred from negative to positive, then from positive to negative. Stress transition is profound for the fracture spacing. Meanwhile, three types of fractures, i.e., consecutive fracture, non-consecutive fracture, and debonding fracture, are found, which are consistent with the observed modes in the field. Multiple inclusions are often fractured easier than an isolated inclusion due to the stress disturbance between inclusions and newly generated fractures. Either in single or multiple inclusions, tensile stresses inside the inclusions are the main driving force for fracture initiation and propagation. Besides, although the material heterogeneity has a small effect on the stress variation, it has an evident impact on the fracturing mode of inclusions. The stiffness ratio is critical for the stress transition and failure pattern; the interface debonding occurs earlier than the fracture initiation inside the inclusion when the stiffness ratio is relatively high. Additionally, the inclusions content only affects the sequence of fracture initiation rather than the final fracture spacing pattern. |
| first_indexed | 2024-03-09T04:45:16Z |
| format | Article |
| id | doaj.art-b71ec9ce86314b188b9c2af01156cb63 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T04:45:16Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-b71ec9ce86314b188b9c2af01156cb632023-12-03T13:16:50ZengMDPI AGApplied Sciences2076-34172022-08-011216804110.3390/app12168041Simulation of the Fracturing Process of Inclusions Embedded in Rock Matrix under CompressionChaoyun Yu0Bin Gong1Na Wu2Penglei Xu3Xiankai Bao4School of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, ChinaDepartment of Civil and Environmental Engineering, Brunel University London, London UB8 3PH, UKState Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, ChinaZhejiang Engineering Survey and Design Institute Group Co., Ltd., Ningbo 315012, ChinaSchool of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, ChinaTypical parallel fractures are often observed in the outcrops of inclusions in the field. To reveal the failure mechanism of inclusions embedded in rock matrix, a series of heterogeneous models are established and tested based on the damage mechanics, statistical strength theory, and continuum mechanics. The results show that, with the spacing between two adjacent fractures decreasing, the stress is firstly transferred from negative to positive, then from positive to negative. Stress transition is profound for the fracture spacing. Meanwhile, three types of fractures, i.e., consecutive fracture, non-consecutive fracture, and debonding fracture, are found, which are consistent with the observed modes in the field. Multiple inclusions are often fractured easier than an isolated inclusion due to the stress disturbance between inclusions and newly generated fractures. Either in single or multiple inclusions, tensile stresses inside the inclusions are the main driving force for fracture initiation and propagation. Besides, although the material heterogeneity has a small effect on the stress variation, it has an evident impact on the fracturing mode of inclusions. The stiffness ratio is critical for the stress transition and failure pattern; the interface debonding occurs earlier than the fracture initiation inside the inclusion when the stiffness ratio is relatively high. Additionally, the inclusions content only affects the sequence of fracture initiation rather than the final fracture spacing pattern.https://www.mdpi.com/2076-3417/12/16/8041inclusionsstress transitionfracture spacingnumerical simulation |
| spellingShingle | Chaoyun Yu Bin Gong Na Wu Penglei Xu Xiankai Bao Simulation of the Fracturing Process of Inclusions Embedded in Rock Matrix under Compression Applied Sciences inclusions stress transition fracture spacing numerical simulation |
| title | Simulation of the Fracturing Process of Inclusions Embedded in Rock Matrix under Compression |
| title_full | Simulation of the Fracturing Process of Inclusions Embedded in Rock Matrix under Compression |
| title_fullStr | Simulation of the Fracturing Process of Inclusions Embedded in Rock Matrix under Compression |
| title_full_unstemmed | Simulation of the Fracturing Process of Inclusions Embedded in Rock Matrix under Compression |
| title_short | Simulation of the Fracturing Process of Inclusions Embedded in Rock Matrix under Compression |
| title_sort | simulation of the fracturing process of inclusions embedded in rock matrix under compression |
| topic | inclusions stress transition fracture spacing numerical simulation |
| url | https://www.mdpi.com/2076-3417/12/16/8041 |
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