Experimental and discrete element method study on the mechanical properties of hole-fracture sandstone
To explore the interaction between holes and fractures in defective white sandstone, uniaxial compression tests were conducted on samples with varying horizontal distances between holes and fractures. The technique known as Digital Image Correlation (DIC) was employed to analyze the deformation patt...
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Frontiers Media S.A.
2025-01-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2024.1535986/full |
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| author | Peijie Lou Peijie Lou Peijie Lou Peijie Lou Lichen Sun Cheng Pan Penghui Ji Huan Liu |
| author_facet | Peijie Lou Peijie Lou Peijie Lou Peijie Lou Lichen Sun Cheng Pan Penghui Ji Huan Liu |
| author_sort | Peijie Lou |
| collection | DOAJ |
| description | To explore the interaction between holes and fractures in defective white sandstone, uniaxial compression tests were conducted on samples with varying horizontal distances between holes and fractures. The technique known as Digital Image Correlation (DIC) was employed to analyze the deformation patterns, while CT scanning technology was implemented to elucidate the interior crack propagation features. Discrete Element Method (DEM) simulations were performed to investigate the micro-scale fracture evolution. The findings demonstrate that load-bearing capacity and deformation resistance decreased as the horizontal hole-fracture distance increased. The failure mode transitioned from a mixed tensile-shear failure to a more rapid tensile failure. Tensile wing fractures caused by tensile failure reinforced the merging of rock bridges. Furthermore, the trajectories of fracture propagated from the outside to the inside of the rocks progressively simplify, resulting in accelerated instability and collapse. DEM simulations indicate that the augmentation of horizontal distance between holes and fractures influenced the displacement field and the orientation of micro-fractures inside the samples. The formation of micro-fractures progressively adhered to a “clusteringexpansion-coalescence” sequence along the paths of the hole-fracture structures. The maximum strength of the samples declined in a three-phase pattern: gradual decline, steep decline, and gradual decline. These findings provide valuable insights for engineering applications, such as tunnel excavation and mining operations. |
| format | Article |
| id | doaj-art-6318f099e3e048b597dd1812be630d71 |
| institution | Kabale University |
| issn | 2296-8016 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Materials |
| spelling | doaj-art-6318f099e3e048b597dd1812be630d712025-01-22T07:11:23ZengFrontiers Media S.A.Frontiers in Materials2296-80162025-01-011110.3389/fmats.2024.15359861535986Experimental and discrete element method study on the mechanical properties of hole-fracture sandstonePeijie Lou0Peijie Lou1Peijie Lou2Peijie Lou3Lichen Sun4Cheng Pan5Penghui Ji6Huan Liu7School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan, ChinaState Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources, University of Mining and Technology, Xuzhou, ChinaPostdoctoral Station of Civil Engineering, Anhui University of Science and Technology, Huainan, ChinaPostdoctoral Research Station of Shandong Huaning Mining Group Co., Ltd., Taian, ChinaSchool of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan, ChinaSchool of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan, ChinaSchool of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan, ChinaZhejiang High Energy Blasting Engineering Co., Ltd., Hangzhou, ChinaTo explore the interaction between holes and fractures in defective white sandstone, uniaxial compression tests were conducted on samples with varying horizontal distances between holes and fractures. The technique known as Digital Image Correlation (DIC) was employed to analyze the deformation patterns, while CT scanning technology was implemented to elucidate the interior crack propagation features. Discrete Element Method (DEM) simulations were performed to investigate the micro-scale fracture evolution. The findings demonstrate that load-bearing capacity and deformation resistance decreased as the horizontal hole-fracture distance increased. The failure mode transitioned from a mixed tensile-shear failure to a more rapid tensile failure. Tensile wing fractures caused by tensile failure reinforced the merging of rock bridges. Furthermore, the trajectories of fracture propagated from the outside to the inside of the rocks progressively simplify, resulting in accelerated instability and collapse. DEM simulations indicate that the augmentation of horizontal distance between holes and fractures influenced the displacement field and the orientation of micro-fractures inside the samples. The formation of micro-fractures progressively adhered to a “clusteringexpansion-coalescence” sequence along the paths of the hole-fracture structures. The maximum strength of the samples declined in a three-phase pattern: gradual decline, steep decline, and gradual decline. These findings provide valuable insights for engineering applications, such as tunnel excavation and mining operations.https://www.frontiersin.org/articles/10.3389/fmats.2024.1535986/fullhole-fracture sandstoneDICCT scanningdiscrete element methodcrack propagation |
| spellingShingle | Peijie Lou Peijie Lou Peijie Lou Peijie Lou Lichen Sun Cheng Pan Penghui Ji Huan Liu Experimental and discrete element method study on the mechanical properties of hole-fracture sandstone Frontiers in Materials hole-fracture sandstone DIC CT scanning discrete element method crack propagation |
| title | Experimental and discrete element method study on the mechanical properties of hole-fracture sandstone |
| title_full | Experimental and discrete element method study on the mechanical properties of hole-fracture sandstone |
| title_fullStr | Experimental and discrete element method study on the mechanical properties of hole-fracture sandstone |
| title_full_unstemmed | Experimental and discrete element method study on the mechanical properties of hole-fracture sandstone |
| title_short | Experimental and discrete element method study on the mechanical properties of hole-fracture sandstone |
| title_sort | experimental and discrete element method study on the mechanical properties of hole fracture sandstone |
| topic | hole-fracture sandstone DIC CT scanning discrete element method crack propagation |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2024.1535986/full |
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