Energy Chaos Characteristic Evolution Analysis of Sandstones during Multilevel Unloading Subject to Different Confining Pressures
文献类型：期刊论文
| 作者 | Dang, Shuang; Bi, Jing; Zhao, Yu; Wang, Chaolin; Xia, Kaizong; Gan, Fei |
| 刊名 | LITHOSPHERE
 |
| 出版日期 | 2022-03-01 |
| 卷号 | 2022 |
| ISSN号 | 1941-8264 |
| 英文摘要 | In this study, multilevel and conventional unloading triaxial compression tests under different confining pressures are separately carried out to systematically reveal the deformation, energy evolution, and fracture characteristics of sandstone samples. Results show that under the multilevel unloading condition, the increase of the initial confining pressure has a more obvious inhibitory effect on the radial strain of sandstone, and the samples can fully exhibit elastic deformation and partial plastic deformation, showing obvious plastic characteristics. The radial energy growth factor is more sensitive than the axial energy growth factor during the process of confining pressure unloading, and the larger the initial confining pressure, the earlier the period-doubling bifurcation region and chaotic region are reached. To better understand the deformation and failure process of rock during engineering excavation, it is necessary to establish a constitutive relation describing the mechanical properties of rock The three-step failure mode also proves that there are tensile and shear fractures in sandstone samples, in which the effects of tensile stress and shear stress are more or less interdependent in the failure process. It can be seen that multilevel unloading makes the energy conversion more adequate and reduces the sudden release of energy when the rock fails, reducing the possibility of rockburst and making the excavation unloading process safer. This will deepen the understanding of rock failure behavior and contribute to the better application of energy characteristics to relevant engineering practices. |
| 学科主题 | Geochemistry & Geophysics ; Geology |
| 语种 | 英语 |
| 出版者 | GEOSCIENCEWORLD |
| WOS记录号 | WOS:000855685500016 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34989]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Guizhou University; 2.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS |
| 推荐引用方式 GB/T 7714 | Dang, Shuang,Bi, Jing,Zhao, Yu,et al. Energy Chaos Characteristic Evolution Analysis of Sandstones during Multilevel Unloading Subject to Different Confining Pressures[J]. LITHOSPHERE,2022,2022. |
| APA | Dang, Shuang,Bi, Jing,Zhao, Yu,Wang, Chaolin,Xia, Kaizong,&Gan, Fei.(2022).Energy Chaos Characteristic Evolution Analysis of Sandstones during Multilevel Unloading Subject to Different Confining Pressures.LITHOSPHERE,2022. |
| MLA | Dang, Shuang,et al."Energy Chaos Characteristic Evolution Analysis of Sandstones during Multilevel Unloading Subject to Different Confining Pressures".LITHOSPHERE 2022(2022). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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