Study on true triaxial compression test of columnar jointed rock mass made of 3D printed polymer and cement-based materials
In this study, a series of true triaxial compression tests were carried out to systematically analyze the mechanical response, failure mode and energy evolution process of irregular columnar jointed rock mass under different irregularity, dip angle and intermediate principal stress ratio ( σ2 / σ3)....
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| Format: | Article |
| Language: | English |
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Elsevier
2025-12-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221450952500751X |
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| author | Zhenbo Xu Zhende Zhu Xiaoyu Wang Xinghua Xie Chao Jiang |
| author_facet | Zhenbo Xu Zhende Zhu Xiaoyu Wang Xinghua Xie Chao Jiang |
| author_sort | Zhenbo Xu |
| collection | DOAJ |
| description | In this study, a series of true triaxial compression tests were carried out to systematically analyze the mechanical response, failure mode and energy evolution process of irregular columnar jointed rock mass under different irregularity, dip angle and intermediate principal stress ratio ( σ2 / σ3). In this paper, the ' complex stress ' condition is defined as the true triaxial stress state of σ1 ≠ σ2 ≠ σ3, and the nonlinear mechanical behavior and failure mechanism of rock mass under this stress state are mainly revealed. The results show that the dip angle and intermediate principal stress ratio are the main factors affecting the mechanical properties and failure modes of columnar jointed rock mass. The change of dip angle leads to the ' U ' -shaped change trend of rock mass strength and shows significant mechanical anisotropy. The increase of the intermediate principal stress ratio strengthens the process of crack propagation and energy dissipation, which significantly affects the transformation of failure modes. Irregularity mainly affects the plastic deformation process, and the effect on strength is relatively small. In terms of energy evolution, it is found that the energy input, transformation and dissipation process of columnar jointed rock mass has obvious stage and nonlinear characteristics, especially in the plastic stage, energy dissipation is dominant and closely related to the failure mode. In addition, based on the traditional Hoek-Brown strength criterion, this paper introduces the irregular joint factor and proposes an improved strength prediction model. |
| format | Article |
| id | doaj-art-813fac65a201400a92fe263e5ff4ca04 |
| institution | Kabale University |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-813fac65a201400a92fe263e5ff4ca042025-08-20T03:24:07ZengElsevierCase Studies in Construction Materials2214-50952025-12-0123e0495310.1016/j.cscm.2025.e04953Study on true triaxial compression test of columnar jointed rock mass made of 3D printed polymer and cement-based materialsZhenbo Xu0Zhende Zhu1Xiaoyu Wang2Xinghua Xie3Chao Jiang4College of Civil Engineering and Transportation, Hohai University, Nanjing 210098, China; Corresponding author.Key Laboratory of Ministry of Education of Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaNanjing Hydraulic Research Institute, Nanjing 210029, ChinaNanjing Hydraulic Research Institute, Nanjing 210029, ChinaCollege of Civil Engineering and Transportation, Hohai University, Nanjing 210098, ChinaIn this study, a series of true triaxial compression tests were carried out to systematically analyze the mechanical response, failure mode and energy evolution process of irregular columnar jointed rock mass under different irregularity, dip angle and intermediate principal stress ratio ( σ2 / σ3). In this paper, the ' complex stress ' condition is defined as the true triaxial stress state of σ1 ≠ σ2 ≠ σ3, and the nonlinear mechanical behavior and failure mechanism of rock mass under this stress state are mainly revealed. The results show that the dip angle and intermediate principal stress ratio are the main factors affecting the mechanical properties and failure modes of columnar jointed rock mass. The change of dip angle leads to the ' U ' -shaped change trend of rock mass strength and shows significant mechanical anisotropy. The increase of the intermediate principal stress ratio strengthens the process of crack propagation and energy dissipation, which significantly affects the transformation of failure modes. Irregularity mainly affects the plastic deformation process, and the effect on strength is relatively small. In terms of energy evolution, it is found that the energy input, transformation and dissipation process of columnar jointed rock mass has obvious stage and nonlinear characteristics, especially in the plastic stage, energy dissipation is dominant and closely related to the failure mode. In addition, based on the traditional Hoek-Brown strength criterion, this paper introduces the irregular joint factor and proposes an improved strength prediction model.http://www.sciencedirect.com/science/article/pii/S221450952500751X3D Printing TechnologyPolymer and cement-based materialsThe columnar jointed rock massTrue triaxial compression testMechanical behavior of rock massEnergy evolution |
| spellingShingle | Zhenbo Xu Zhende Zhu Xiaoyu Wang Xinghua Xie Chao Jiang Study on true triaxial compression test of columnar jointed rock mass made of 3D printed polymer and cement-based materials Case Studies in Construction Materials 3D Printing Technology Polymer and cement-based materials The columnar jointed rock mass True triaxial compression test Mechanical behavior of rock mass Energy evolution |
| title | Study on true triaxial compression test of columnar jointed rock mass made of 3D printed polymer and cement-based materials |
| title_full | Study on true triaxial compression test of columnar jointed rock mass made of 3D printed polymer and cement-based materials |
| title_fullStr | Study on true triaxial compression test of columnar jointed rock mass made of 3D printed polymer and cement-based materials |
| title_full_unstemmed | Study on true triaxial compression test of columnar jointed rock mass made of 3D printed polymer and cement-based materials |
| title_short | Study on true triaxial compression test of columnar jointed rock mass made of 3D printed polymer and cement-based materials |
| title_sort | study on true triaxial compression test of columnar jointed rock mass made of 3d printed polymer and cement based materials |
| topic | 3D Printing Technology Polymer and cement-based materials The columnar jointed rock mass True triaxial compression test Mechanical behavior of rock mass Energy evolution |
| url | http://www.sciencedirect.com/science/article/pii/S221450952500751X |
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