Deterioration Characteristic and Constitutive Model of Red-Bed Argillaceous Siltstone Subjected to Drying-Wetting Cycles
AbstractRed-bed argillaceous siltstone is one of main types of rocks composing unstable slopes on both banks of water diversion project from the Yangtze to Huaihe River and is prone to deterioration after subjected to drying-wetting cycle conditions during water diversion project ope...
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| Format: | Article |
| Language: | English |
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GeoScienceWorld
2022-04-01
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| Series: | Lithosphere |
| Online Access: | https://pubs.geoscienceworld.org/lithosphere/article/2022/1/8786210/612981/Deterioration-Characteristic-and-Constitutive |
| _version_ | 1811343054270889984 |
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| author | Fusheng Zha Kai Huang Bo Kang Xianguo Sun Jingwen Su Yunfeng Li Zhitang Lu |
| author_facet | Fusheng Zha Kai Huang Bo Kang Xianguo Sun Jingwen Su Yunfeng Li Zhitang Lu |
| author_sort | Fusheng Zha |
| collection | DOAJ |
| description |
AbstractRed-bed argillaceous siltstone is one of main types of rocks composing unstable slopes on both banks of water diversion project from the Yangtze to Huaihe River and is prone to deterioration after subjected to drying-wetting cycle conditions during water diversion project operation. The study of the damage degradation and the constitutive relationship of rocks subjected to drying-wetting cycle process is therefore of critical scientific importance. In this paper, laboratory tests were conducted to investigate the effect of drying-wetting cycles on the mechanical properties and microstructural characteristics. The experimental results show that the microstructure of the sample surface is no longer dense and uniform and the porosity of tested samples significantly increases with drying-wetting cycles increasing. After subjected to cycles of drying-wetting, the compaction stage of the stress-strain curve becomes longer with more pronounced nonlinear features, while uniaxial compression strength (UCS) and elastic modulus drop obviously. Combined with the evolution characteristics of microstructure found as the porosity grew, UCS and elastic modulus gradually decline. Additionally, from the perspective of energy analysis, the input energy density and dissipated energy density gradually extended with the increasing strain, and the elastic energy density increased first and then declined. As the number of drying-wetting cycles increases, the energy density of samples all present linear fell. Based on the evolution of dissipated energy, a new damage model of red-bed argillaceous siltstone subjected to drying-wetting cycles was established by introducing compaction coefficient. The coefficients of determination (R2) of the constitutive model are always greater than 0.85, indicating that the proposed model is generally in good agreement with the experimental data under different drying-wetting cycles. This paper has specific research and reference value to understand the damage evolution characteristics of red-bed argillaceous siltstone under cyclic drying-wetting. |
| first_indexed | 2024-04-13T19:22:55Z |
| format | Article |
| id | doaj.art-edea942a98cf4729b50b3fa2b6944b61 |
| institution | Directory Open Access Journal |
| issn | 1941-8264 1947-4253 |
| language | English |
| last_indexed | 2024-04-13T19:22:55Z |
| publishDate | 2022-04-01 |
| publisher | GeoScienceWorld |
| record_format | Article |
| series | Lithosphere |
| spelling | doaj.art-edea942a98cf4729b50b3fa2b6944b612022-12-22T02:33:29ZengGeoScienceWorldLithosphere1941-82641947-42532022-04-012022110.2113/2022/8786210Deterioration Characteristic and Constitutive Model of Red-Bed Argillaceous Siltstone Subjected to Drying-Wetting CyclesFusheng Zha0http://orcid.org/0000-0003-1094-5924Kai Huang1http://orcid.org/0000-0002-5326-9842Bo Kang2http://orcid.org/0000-0002-7776-280XXianguo Sun3http://orcid.org/0000-0003-3717-2810Jingwen Su4http://orcid.org/0000-0002-7158-3157Yunfeng Li5http://orcid.org/0000-0003-3709-0188Zhitang Lu6http://orcid.org/0000-0001-7673-7496School of Resource and Environmental Engineering Hefei University of Technology Hefei 230009 China hfut.edu.cnSchool of Resource and Environmental Engineering Hefei University of Technology Hefei 230009 China hfut.edu.cnSchool of Resource and Environmental Engineering Hefei University of Technology Hefei 230009 China hfut.edu.cnAnhui Huizi Construction Engineering Co. Ltd. Wuhu 241000 ChinaNanjing Geological Survey Center China Geological Survey Nanjing 210016 China cgs.gov.cnNanjing Geological Survey Center China Geological Survey Nanjing 210016 China cgs.gov.cnSchool of Resource and Environmental Engineering Hefei University of Technology Hefei 230009 China hfut.edu.cn AbstractRed-bed argillaceous siltstone is one of main types of rocks composing unstable slopes on both banks of water diversion project from the Yangtze to Huaihe River and is prone to deterioration after subjected to drying-wetting cycle conditions during water diversion project operation. The study of the damage degradation and the constitutive relationship of rocks subjected to drying-wetting cycle process is therefore of critical scientific importance. In this paper, laboratory tests were conducted to investigate the effect of drying-wetting cycles on the mechanical properties and microstructural characteristics. The experimental results show that the microstructure of the sample surface is no longer dense and uniform and the porosity of tested samples significantly increases with drying-wetting cycles increasing. After subjected to cycles of drying-wetting, the compaction stage of the stress-strain curve becomes longer with more pronounced nonlinear features, while uniaxial compression strength (UCS) and elastic modulus drop obviously. Combined with the evolution characteristics of microstructure found as the porosity grew, UCS and elastic modulus gradually decline. Additionally, from the perspective of energy analysis, the input energy density and dissipated energy density gradually extended with the increasing strain, and the elastic energy density increased first and then declined. As the number of drying-wetting cycles increases, the energy density of samples all present linear fell. Based on the evolution of dissipated energy, a new damage model of red-bed argillaceous siltstone subjected to drying-wetting cycles was established by introducing compaction coefficient. The coefficients of determination (R2) of the constitutive model are always greater than 0.85, indicating that the proposed model is generally in good agreement with the experimental data under different drying-wetting cycles. This paper has specific research and reference value to understand the damage evolution characteristics of red-bed argillaceous siltstone under cyclic drying-wetting.https://pubs.geoscienceworld.org/lithosphere/article/2022/1/8786210/612981/Deterioration-Characteristic-and-Constitutive |
| spellingShingle | Fusheng Zha Kai Huang Bo Kang Xianguo Sun Jingwen Su Yunfeng Li Zhitang Lu Deterioration Characteristic and Constitutive Model of Red-Bed Argillaceous Siltstone Subjected to Drying-Wetting Cycles Lithosphere |
| title | Deterioration Characteristic and Constitutive Model of Red-Bed Argillaceous Siltstone Subjected to Drying-Wetting Cycles |
| title_full | Deterioration Characteristic and Constitutive Model of Red-Bed Argillaceous Siltstone Subjected to Drying-Wetting Cycles |
| title_fullStr | Deterioration Characteristic and Constitutive Model of Red-Bed Argillaceous Siltstone Subjected to Drying-Wetting Cycles |
| title_full_unstemmed | Deterioration Characteristic and Constitutive Model of Red-Bed Argillaceous Siltstone Subjected to Drying-Wetting Cycles |
| title_short | Deterioration Characteristic and Constitutive Model of Red-Bed Argillaceous Siltstone Subjected to Drying-Wetting Cycles |
| title_sort | deterioration characteristic and constitutive model of red bed argillaceous siltstone subjected to drying wetting cycles |
| url | https://pubs.geoscienceworld.org/lithosphere/article/2022/1/8786210/612981/Deterioration-Characteristic-and-Constitutive |
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