Propagation behavior of two collinear mode Ⅰ cracks driven by explosive gas
In smooth pre-splitting blasting, two collinear cracks extending opposite to each other between adjacent holes will first avoid each other and then attract each other, resulting in crack propagation path that often presents hooked or butterfly-shaped loops.Based on the maximum tensile-stress criteri...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Emergency Management Press
2023-08-01
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| Series: | 矿业科学学报 |
| Subjects: | |
| Online Access: | http://kykxxb.cumtb.edu.cn/en/article/doi/10.19606/j.cnki.jmst.2023.04.010 |
| _version_ | 1797804349903077376 |
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| author | Yang Liyun Dong Pengxiang Wang Qirui Wang Qingcheng |
| author_facet | Yang Liyun Dong Pengxiang Wang Qirui Wang Qingcheng |
| author_sort | Yang Liyun |
| collection | DOAJ |
| description | In smooth pre-splitting blasting, two collinear cracks extending opposite to each other between adjacent holes will first avoid each other and then attract each other, resulting in crack propagation path that often presents hooked or butterfly-shaped loops.Based on the maximum tensile-stress criterion modified by T-stress, this study probed into the crack propagation behavior of two collinear mode Ⅰ cracks extending opposite to each other by using Abaqus and Hypermesh.The numerical results indicated that model size(ratio of model width to height: W/H ), crack length(ratio of initial crack length to circular hole radius: a/r)and pressure distribution of explosive gas on crack surface have a significant effect on crack growth behavior.Deflection occurs during the propagation of mode I crack, which makes the crack propagation path presents hooked loops.The explosive gas on the crack surface reduces the degree of deflection in mode I crack propagation, and makes it more difficult for the crack growth path to show "hooking" phenomenon The crack propagation path is simulated by the method of incremental crack propagation and the results show that the crack propagation path of mode I crack does present hooked loops.The phenomenon of "hooking" of crack propagation path is related to the interaction between the cracks, which can be represented by the crack growth angle θ. |
| first_indexed | 2024-03-13T05:35:50Z |
| format | Article |
| id | doaj.art-b7f897ef03544d21ac9b86967dd60ded |
| institution | Directory Open Access Journal |
| issn | 2096-2193 |
| language | English |
| last_indexed | 2024-03-13T05:35:50Z |
| publishDate | 2023-08-01 |
| publisher | Emergency Management Press |
| record_format | Article |
| series | 矿业科学学报 |
| spelling | doaj.art-b7f897ef03544d21ac9b86967dd60ded2023-06-14T09:23:12ZengEmergency Management Press矿业科学学报2096-21932023-08-018453854710.19606/j.cnki.jmst.2023.04.010kykxxb-8-4-538Propagation behavior of two collinear mode Ⅰ cracks driven by explosive gasYang Liyun0Dong Pengxiang1Wang Qirui2Wang Qingcheng3School of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaDepartment of Civil Engineering, Tsinghua University, Beijing 100084, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaIn smooth pre-splitting blasting, two collinear cracks extending opposite to each other between adjacent holes will first avoid each other and then attract each other, resulting in crack propagation path that often presents hooked or butterfly-shaped loops.Based on the maximum tensile-stress criterion modified by T-stress, this study probed into the crack propagation behavior of two collinear mode Ⅰ cracks extending opposite to each other by using Abaqus and Hypermesh.The numerical results indicated that model size(ratio of model width to height: W/H ), crack length(ratio of initial crack length to circular hole radius: a/r)and pressure distribution of explosive gas on crack surface have a significant effect on crack growth behavior.Deflection occurs during the propagation of mode I crack, which makes the crack propagation path presents hooked loops.The explosive gas on the crack surface reduces the degree of deflection in mode I crack propagation, and makes it more difficult for the crack growth path to show "hooking" phenomenon The crack propagation path is simulated by the method of incremental crack propagation and the results show that the crack propagation path of mode I crack does present hooked loops.The phenomenon of "hooking" of crack propagation path is related to the interaction between the cracks, which can be represented by the crack growth angle θ.http://kykxxb.cumtb.edu.cn/en/article/doi/10.19606/j.cnki.jmst.2023.04.010t-stressexplosive gascrack growthdouble cracksnumerical simulation |
| spellingShingle | Yang Liyun Dong Pengxiang Wang Qirui Wang Qingcheng Propagation behavior of two collinear mode Ⅰ cracks driven by explosive gas 矿业科学学报 t-stress explosive gas crack growth double cracks numerical simulation |
| title | Propagation behavior of two collinear mode Ⅰ cracks driven by explosive gas |
| title_full | Propagation behavior of two collinear mode Ⅰ cracks driven by explosive gas |
| title_fullStr | Propagation behavior of two collinear mode Ⅰ cracks driven by explosive gas |
| title_full_unstemmed | Propagation behavior of two collinear mode Ⅰ cracks driven by explosive gas |
| title_short | Propagation behavior of two collinear mode Ⅰ cracks driven by explosive gas |
| title_sort | propagation behavior of two collinear mode i cracks driven by explosive gas |
| topic | t-stress explosive gas crack growth double cracks numerical simulation |
| url | http://kykxxb.cumtb.edu.cn/en/article/doi/10.19606/j.cnki.jmst.2023.04.010 |
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