CT measurement of damage characteristics of meso-structure of freeze-thawed granite in cold regions and preliminary exploration of its mechanical behavior during a single freeze-thaw process
The freeze-thaw (FT) damage characteristics of granite after different FT cycles were studied using computed tomography (CT) images. The three-dimensional (3D) volume numbers in the image were extracted to obtain the 3D pore structure of representative volume elements (RVEs) of granite under differe...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2023-12-01
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| Series: | Applied Rheology |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/arh-2023-0106 |
| _version_ | 1797397431273390080 |
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| author | Zhang Chunyang Tan Tao Ke Bo Ma Bingde Dai Bibo Fang Zhiheng Zhao Ercheng |
| author_facet | Zhang Chunyang Tan Tao Ke Bo Ma Bingde Dai Bibo Fang Zhiheng Zhao Ercheng |
| author_sort | Zhang Chunyang |
| collection | DOAJ |
| description | The freeze-thaw (FT) damage characteristics of granite after different FT cycles were studied using computed tomography (CT) images. The three-dimensional (3D) volume numbers in the image were extracted to obtain the 3D pore structure of representative volume elements (RVEs) of granite under different FT cycles. The CT images of granite after 80 FT cycles were selected to draw reference lines for quantitative analysis of the distribution of meso-cracks in granite after FT cycles. Subsequently, a finite element model was established to explore the mechanical properties of minerals in granite during a single FT process. The results show that the FT damage inside the granite exhibits fracture characteristics, and the number of internal cracks, cracks area, and voxel porosity increase with the increase of FT cycles. After 80 FT cycles, the distribution of meso-cracks on the cross-section of granite exhibits significant anisotropy, and the distribution density and variation coefficient of meso-cracks vary with the dip direction angle of the reference line. The maximum principal stress and strain in the finite element model are negatively related to temperature. The maximum principal stress and strain of biotite minerals are consistently higher than those of feldspar and mica during FT cycles. The results can provide a reference for exploring the internal mechanism of the weakening of mechanical properties of granite microstructure caused by FT damage in cold regions. |
| first_indexed | 2024-03-09T01:09:55Z |
| format | Article |
| id | doaj.art-a7771af853044675a24626a3e7b23cb2 |
| institution | Directory Open Access Journal |
| issn | 1617-8106 |
| language | English |
| last_indexed | 2024-03-09T01:09:55Z |
| publishDate | 2023-12-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Applied Rheology |
| spelling | doaj.art-a7771af853044675a24626a3e7b23cb22023-12-11T07:35:56ZengDe GruyterApplied Rheology1617-81062023-12-0133151884710.1515/arh-2023-0106CT measurement of damage characteristics of meso-structure of freeze-thawed granite in cold regions and preliminary exploration of its mechanical behavior during a single freeze-thaw processZhang Chunyang0Tan Tao1Ke Bo2Ma Bingde3Dai Bibo4Fang Zhiheng5Zhao Ercheng6Sinosteel Maanshan General Institute of Mining Research Co., Ltd, Maanshan243000, Anhui, ChinaSchool of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan430070, Hubei, ChinaSchool of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan430070, Hubei, ChinaSchool of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan430070, Hubei, ChinaSinosteel Maanshan General Institute of Mining Research Co., Ltd, Maanshan243000, Anhui, ChinaZhongye Changtian International Engineering Co., Ltd, Changsha410007, Hunan, ChinaLanzhou Engineering & Research Institute of Nonferrous Metallurgy Co., Ltd, Lanzhou730000, Gansu, ChinaThe freeze-thaw (FT) damage characteristics of granite after different FT cycles were studied using computed tomography (CT) images. The three-dimensional (3D) volume numbers in the image were extracted to obtain the 3D pore structure of representative volume elements (RVEs) of granite under different FT cycles. The CT images of granite after 80 FT cycles were selected to draw reference lines for quantitative analysis of the distribution of meso-cracks in granite after FT cycles. Subsequently, a finite element model was established to explore the mechanical properties of minerals in granite during a single FT process. The results show that the FT damage inside the granite exhibits fracture characteristics, and the number of internal cracks, cracks area, and voxel porosity increase with the increase of FT cycles. After 80 FT cycles, the distribution of meso-cracks on the cross-section of granite exhibits significant anisotropy, and the distribution density and variation coefficient of meso-cracks vary with the dip direction angle of the reference line. The maximum principal stress and strain in the finite element model are negatively related to temperature. The maximum principal stress and strain of biotite minerals are consistently higher than those of feldspar and mica during FT cycles. The results can provide a reference for exploring the internal mechanism of the weakening of mechanical properties of granite microstructure caused by FT damage in cold regions.https://doi.org/10.1515/arh-2023-0106freeze-thaw cyclesgranitect scanfracturenumerical simulation |
| spellingShingle | Zhang Chunyang Tan Tao Ke Bo Ma Bingde Dai Bibo Fang Zhiheng Zhao Ercheng CT measurement of damage characteristics of meso-structure of freeze-thawed granite in cold regions and preliminary exploration of its mechanical behavior during a single freeze-thaw process Applied Rheology freeze-thaw cycles granite ct scan fracture numerical simulation |
| title | CT measurement of damage characteristics of meso-structure of freeze-thawed granite in cold regions and preliminary exploration of its mechanical behavior during a single freeze-thaw process |
| title_full | CT measurement of damage characteristics of meso-structure of freeze-thawed granite in cold regions and preliminary exploration of its mechanical behavior during a single freeze-thaw process |
| title_fullStr | CT measurement of damage characteristics of meso-structure of freeze-thawed granite in cold regions and preliminary exploration of its mechanical behavior during a single freeze-thaw process |
| title_full_unstemmed | CT measurement of damage characteristics of meso-structure of freeze-thawed granite in cold regions and preliminary exploration of its mechanical behavior during a single freeze-thaw process |
| title_short | CT measurement of damage characteristics of meso-structure of freeze-thawed granite in cold regions and preliminary exploration of its mechanical behavior during a single freeze-thaw process |
| title_sort | ct measurement of damage characteristics of meso structure of freeze thawed granite in cold regions and preliminary exploration of its mechanical behavior during a single freeze thaw process |
| topic | freeze-thaw cycles granite ct scan fracture numerical simulation |
| url | https://doi.org/10.1515/arh-2023-0106 |
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