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Experimental Study on Mechanical Properties and Failure Laws of Granite with Artificial Flaws under Coupled Static and Dynamic Loads

文献类型：期刊论文

作者Li, Guang1,2; Liu, Shuaiqi3; Lu, Rong4; Ma, Fengshan1,2; Guo, Jie1,2
刊名MATERIALS
出版日期2022-09-01
卷号15期号:17页码:11
关键词coupled static and dynamic loads artificial flaw SHPB 3D-DIC failure laws
DOI10.3390/ma15176105
英文摘要Rock is the main construction material of rock engineering, such as the engineering of mines and tunnels; in addition, its mechanical properties and failure laws are of great significance to the stability evaluation of rock engineering, especially under the conditions of coupled static-static stresses. In this study, granite specimens were manufactured with artificial flaws. Coupled static and dynamic loads tests were carried out with a modified split Hopkinson pressure bar (SHPB) apparatus; and six typical levels of axial pre-stresses and three crack inclination angles were designed. Three-dimensional digital image correlation (3D-DIC) was also applied to record and analyze the fracturing process and damage evolution of the specimens. The test results show that there was no compaction stage in the stress-strain curve under combined dynamic and static loading. The dynamic strength of the specimens increased first and then decreased with the increase in the static pressure; moreover, the specimens reached the maximum dynamic strength when the static pressure was 10% UCS. The dynamic strength decreased first and then increased with the increase in the crack inclination angle; and the lowest strength appeared when the inclination angle was 45 degrees. The change in axial compression had a significant influence on the failure mode, and the failure mode gradually transformed from shear-tensile failure to shear failure with the increase in the pre-stress. The tensile strain was usually generated at the end of the fractures or near the rock bridge. When the axial pressure was small, the tensile strain zone parallel to the loading direction was easily generated; and when the axial pressure was large, a shear strain zone developed, extending along the diagonal direction. The research results can provide a theoretical reference for the correct understanding of the failure mechanisms of granite and its engineering stability under actual conditions.
WOS关键词FRACTURE EVOLUTION ; SANDSTONE ; CRACKING ; BEHAVIOR ; ROCK ; DEFORMATION ; STRENGTH ; FISSURES ; HOLE
资助项目National Science Foundation of China[41831293] ; National Science Foundation of China[42072305]
WOS研究方向Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
语种英语
WOS记录号WOS:000851646900001
出版者MDPI
资助机构National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/108375]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Liu, Shuaiqi
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
3.China Natl Petr Corp, Econ & Technol Res Inst, Beijing 100011, Peoples R China
4.Beijing Urban Construct Design & Dev Grp Co Ltd, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Li, Guang,Liu, Shuaiqi,Lu, Rong,et al. Experimental Study on Mechanical Properties and Failure Laws of Granite with Artificial Flaws under Coupled Static and Dynamic Loads[J]. MATERIALS,2022,15(17):11.
APA Li, Guang,Liu, Shuaiqi,Lu, Rong,Ma, Fengshan,&Guo, Jie.(2022).Experimental Study on Mechanical Properties and Failure Laws of Granite with Artificial Flaws under Coupled Static and Dynamic Loads.MATERIALS,15(17),11.
MLA Li, Guang,et al."Experimental Study on Mechanical Properties and Failure Laws of Granite with Artificial Flaws under Coupled Static and Dynamic Loads".MATERIALS 15.17(2022):11.

入库方式： OAI收割

来源：地质与地球物理研究所

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