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Fracture Characteristics and Geometric Fractal of Damaged Sandstone under Impact Load
Joint Authors
Zheng, Qiangqiang
Ni, Xian
Cheng, Bing
Wang, Qianqian
Hu, Hao
Gao, Xin
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-11-16
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Before the rock mass in the engineering is broken under load, it is usually in a state of varying degrees of damage.
Aiming at the fracture characteristics of damaged sandstone under impact load, this paper adopts a method of the cyclic static load to cause the sandstone specimens to have varying degrees of damage.
Then, the wave velocity of sandstone before and after the damage is measured using the nonmetallic acoustic velocimeter, and the change rule of damage factor is analyzed.
Finally, the split Hopkinson pressure bar (SHPB) is used to test the impact dynamics of sandstone with different damage degrees.
The broken rock block is screened by a vibrating screen, and the crushing characteristics are analyzed.
The results show that not only the damage factor of damaged sandstone but the growth rate increases, with the raising upper limit of stress.
Under the impact load of the same incident energy, the fragmentation degree of the damaged sandstone increases with the increase of the upper stress limit, while the average diameter of the broken rock block decreases gradually, and the reduction rate increases first and then decreases.
American Psychological Association (APA)
Hu, Hao& Zheng, Qiangqiang& Gao, Xin& Cheng, Bing& Wang, Qianqian& Ni, Xian. 2020. Fracture Characteristics and Geometric Fractal of Damaged Sandstone under Impact Load. Shock and Vibration،Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1210164
Modern Language Association (MLA)
Hu, Hao…[et al.]. Fracture Characteristics and Geometric Fractal of Damaged Sandstone under Impact Load. Shock and Vibration No. 2020 (2020), pp.1-10.
https://search.emarefa.net/detail/BIM-1210164
American Medical Association (AMA)
Hu, Hao& Zheng, Qiangqiang& Gao, Xin& Cheng, Bing& Wang, Qianqian& Ni, Xian. Fracture Characteristics and Geometric Fractal of Damaged Sandstone under Impact Load. Shock and Vibration. 2020. Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1210164
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1210164