Tensile Strength and Fracture Surface Morphology of Granite Under Confined Direct Tension Test
文献类型：期刊论文
| 作者 | Liu, Yang1; Huang, Da1,2; Cen, Duofeng1; Zhong, Zhu1; Gong, Fengqiang3; Wu, Zhijun4; Yang, Yongtao5 |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2021-06-15 |
| 期号 | -页码:15 |
| ISSN号 | 0723-2632 |
| 关键词 | Tensile strength Fracture surface morphology Confined direct tension test Confining pressure Loading rate |
| DOI | 10.1007/s00603-021-02543-7 |
| 英文摘要 | The tensile strength of rock is a crucial parameter for the stability assessment and reinforcement design of rock engineering, which is commonly determined by indirect tension test or uniaxial direct tension test. However, the rock in slopes and underground caverns is often in a direct tension stress state under confining pressure, due to the stress redistribution induced by excavation or mining. In this study, the direct tension tests of granite samples under both different confining pressures and tensile loading rates were carried out by an auxiliary apparatus installed in pressure chamber, to investigate the confined tensile strength and fracture surface morphology. High-precision 3D laser scanning was used to obtain the morphology data and the geometrical statistics of asperities on fracture surface, containing the distributions of height, dip angle and dip direction of the asperities. The tensile strength first increases and then decreases with the increase in confining pressure, indicating that the maximum tensile strength of tested granite is not the uniaxial tensile strength and appears in the condition of a certain confining pressure. The tensile strength slightly increases with the increase in tensile loading rate. The fracture surface is smoother as confining pressure increases, while is rougher with the increase in tensile loading rate. As confining pressure goes up, from a micro-point of view, the friction force and the locking force between grains of granite have a similar changing rule to the tensile strength. The roughness of fracture is closely related with both micro-fracture pattern between grains and macro-fracture pattern concerning tensile and shear properties. These provide a reasonable explanation for the correlation of the tensile strength and fracture roughness with confining pressure and loading rate. |
| 资助项目 | National Natural Science Foundation of China[41972297] ; National Natural Science Foundation of China[41807279] ; National Natural Science Foundation of China[42007276] ; Natural Science Foundation of Tianjin Municipality, China[20JCQNJC00980] ; Natural Science Foundation of Hebei Province, China[E2019202336] ; Supporting program of hundred promising innovative talents in Hebei provincial education office[SLRC2019027] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| 出版者 | SPRINGER WIEN |
| WOS记录号 | WOS:000661781800001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/27522]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Hebei Univ Technol, Sch Civil & Transportat Engn, Tianjin 300401, Peoples R China 2.Changan Univ, Coll Geol Engn & Geomat, Xian 710054, Peoples R China 3.Southeast Univ, Sch Civil Engn, Nanjing 211189, Peoples R China 4.Wuhan Univ, Sch Civil Engn, Wuhan 430072, Peoples R China 5.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Yang,Huang, Da,Cen, Duofeng,et al. Tensile Strength and Fracture Surface Morphology of Granite Under Confined Direct Tension Test[J]. ROCK MECHANICS AND ROCK ENGINEERING,2021(-):15. |
| APA | Liu, Yang.,Huang, Da.,Cen, Duofeng.,Zhong, Zhu.,Gong, Fengqiang.,...&Yang, Yongtao.(2021).Tensile Strength and Fracture Surface Morphology of Granite Under Confined Direct Tension Test.ROCK MECHANICS AND ROCK ENGINEERING(-),15. |
| MLA | Liu, Yang,et al."Tensile Strength and Fracture Surface Morphology of Granite Under Confined Direct Tension Test".ROCK MECHANICS AND ROCK ENGINEERING .-(2021):15. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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