Mechanical Modeling of Frozen Coarse-Grained Materials Incorporating Microscale Investigation
In the cold regions of China, coarse-grained materials are frequently encountered or used as backfilling materials in infrastructure construction, such as dams, highways, railways, and mineral engineering structures. Effects of confining pressure (0.2, 0.5, and 1 MPa) and frozen temperature (−2, −5,...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/6639428 |
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| author | Shan-Zhen Li Liang Tang Shuang Tian Xian-Zhang Ling Yang-Sheng Ye De-Gou Cai |
| author_facet | Shan-Zhen Li Liang Tang Shuang Tian Xian-Zhang Ling Yang-Sheng Ye De-Gou Cai |
| author_sort | Shan-Zhen Li |
| collection | DOAJ |
| description | In the cold regions of China, coarse-grained materials are frequently encountered or used as backfilling materials in infrastructure construction, such as dams, highways, railways, and mineral engineering structures. Effects of confining pressure (0.2, 0.5, and 1 MPa) and frozen temperature (−2, −5, −10, and −15°C) on the stress-strain response and elastic modulus were investigated using triaxial compression tests. Moreover, the microscale structures of a coarse-grained material were obtained by X-ray computed tomography. The coarse-grained material specimens exhibited strain-softening and significant dilatancy behaviors during shearing. A modified model considering microstructures of the material was proposed to describe these phenomena. The predicted values coincided well with the experimental results obtained in this study and other literatures. The sensitivity analysis of parameters indicated that the model can simulate the initial hardening and post-peak strain-softening behavior of soils. And the transition of volume strain from contraction to dilatancy can also be described using this model. The results obtained in this study can provide a helpful reference for the analysis of frozen coarse-grained materials in geotechnical engineering. |
| format | Article |
| id | doaj-art-805914592b8d4741986e771cdc6a5001 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-805914592b8d4741986e771cdc6a50012025-02-03T06:01:16ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422021-01-01202110.1155/2021/66394286639428Mechanical Modeling of Frozen Coarse-Grained Materials Incorporating Microscale InvestigationShan-Zhen Li0Liang Tang1Shuang Tian2Xian-Zhang Ling3Yang-Sheng Ye4De-Gou Cai5School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Harbin 150090, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Harbin 150090, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Harbin 150090, ChinaState Key Laboratory for Track Technology of High-Speed Railway, China Academy of Railway Sciences Corporation Limited, Beijing 100081, ChinaState Key Laboratory for Track Technology of High-Speed Railway, China Academy of Railway Sciences Corporation Limited, Beijing 100081, ChinaIn the cold regions of China, coarse-grained materials are frequently encountered or used as backfilling materials in infrastructure construction, such as dams, highways, railways, and mineral engineering structures. Effects of confining pressure (0.2, 0.5, and 1 MPa) and frozen temperature (−2, −5, −10, and −15°C) on the stress-strain response and elastic modulus were investigated using triaxial compression tests. Moreover, the microscale structures of a coarse-grained material were obtained by X-ray computed tomography. The coarse-grained material specimens exhibited strain-softening and significant dilatancy behaviors during shearing. A modified model considering microstructures of the material was proposed to describe these phenomena. The predicted values coincided well with the experimental results obtained in this study and other literatures. The sensitivity analysis of parameters indicated that the model can simulate the initial hardening and post-peak strain-softening behavior of soils. And the transition of volume strain from contraction to dilatancy can also be described using this model. The results obtained in this study can provide a helpful reference for the analysis of frozen coarse-grained materials in geotechnical engineering.http://dx.doi.org/10.1155/2021/6639428 |
| spellingShingle | Shan-Zhen Li Liang Tang Shuang Tian Xian-Zhang Ling Yang-Sheng Ye De-Gou Cai Mechanical Modeling of Frozen Coarse-Grained Materials Incorporating Microscale Investigation Advances in Materials Science and Engineering |
| title | Mechanical Modeling of Frozen Coarse-Grained Materials Incorporating Microscale Investigation |
| title_full | Mechanical Modeling of Frozen Coarse-Grained Materials Incorporating Microscale Investigation |
| title_fullStr | Mechanical Modeling of Frozen Coarse-Grained Materials Incorporating Microscale Investigation |
| title_full_unstemmed | Mechanical Modeling of Frozen Coarse-Grained Materials Incorporating Microscale Investigation |
| title_short | Mechanical Modeling of Frozen Coarse-Grained Materials Incorporating Microscale Investigation |
| title_sort | mechanical modeling of frozen coarse grained materials incorporating microscale investigation |
| url | http://dx.doi.org/10.1155/2021/6639428 |
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