An Experimental and Modeling Investigation on Creep Mechanical Behavior of Granite Under Triaxial Cyclic Loading and Unloading
文献类型：期刊论文
| 作者 | Yang, Sheng-Qi2; Tang, Jin-Zhou1; Wang, Su-Sheng2; Yang, Dian-Sen3; Zheng, Wen-Tang4 |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2022-09-01 |
| 卷号 | 55期号:9页码:5577 |
| ISSN号 | 0723-2632 |
| 关键词 | Granite Creep experiment Multi-step loading and unloading X-ray micro-CT Creep damage modelling |
| 英文摘要 | The objective of this work is to investigate the creep damage mechanism of granite from a nuclear power station. A series of multi-step loading and unloading cycles creep tests of granite were carried out under different confining pressures. For the creep test, the creep differential stresses (i.e., 60%, 70%, 80%, 90%, 100% and even larger than 100% of sigma(p)) were applied according to the instantaneous peak deviatoric stress sigma(p). To study the elastic-visco-plastic creep deformations of the granite specimens, the total strain was divided into instantaneous and creep strains, including the instantaneous elastic strain, plastic strain, visco-elastic strain, and visco-plastic strain. The results show that the short-term strength, crack damage threshold, and Young's modulus all increased with the increasing of confining pressure. Due to an existing critical stress, the creep strain stabilizes when the applied stress is less than the stress level. An exponential function is proposed, which can well describe the relationship between the visco-plastic strain and stress ratio. The long-term strength of the granite corresponds to the stress level at the stress ratio range from 0.86 to 0.95. Besides, the damage mechanism of the failed granite specimens is analyzed using an X-ray micro-CT scanning system. Finally, a time-dependent damage model is proposed to quantitatively characterize the creep damage and deformation behaviors of granite. |
| 学科主题 | Engineering ; Geology |
| 语种 | 英语 |
| 出版者 | SPRINGER WIEN |
| WOS记录号 | WOS:000814939400001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35334]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, Anhui, People’s Republic of China 2.State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, People’s Republic of China 3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, Hubei, People’s Republic of China 4.China Energy Engineering Group, Guangdong Electric Power Design Institute Co., LTD, Guangzhou 510000, Guangdong, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Yang, Sheng-Qi,Tang, Jin-Zhou,Wang, Su-Sheng,et al. An Experimental and Modeling Investigation on Creep Mechanical Behavior of Granite Under Triaxial Cyclic Loading and Unloading[J]. ROCK MECHANICS AND ROCK ENGINEERING,2022,55(9):5577. |
| APA | Yang, Sheng-Qi,Tang, Jin-Zhou,Wang, Su-Sheng,Yang, Dian-Sen,&Zheng, Wen-Tang.(2022).An Experimental and Modeling Investigation on Creep Mechanical Behavior of Granite Under Triaxial Cyclic Loading and Unloading.ROCK MECHANICS AND ROCK ENGINEERING,55(9),5577. |
| MLA | Yang, Sheng-Qi,et al."An Experimental and Modeling Investigation on Creep Mechanical Behavior of Granite Under Triaxial Cyclic Loading and Unloading".ROCK MECHANICS AND ROCK ENGINEERING 55.9(2022):5577. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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