Experimental study for effects of strain rates and joint angles on dynamic responses of simulated rock materials

被引：0
|
作者：
Li X. [1 ]
Wang J. [2 ]
Zhang Z. [1 ]
Huang Y. [3 ]
机构：
[1] Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming, 650093, Yunnan
[2] College of Civil and Architectural Engineering, Yunnan Agricultural University, Kunming, 650201, Yunnan
[3] Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming, 650500, Yunnan
来源：
| 1600年 / Explosion and Shock Waves卷 / 36期
关键词：
Dissipation energy; Dynamic response; Joint angle; Jointed rock; SHPB; Solid mechanics; Strain rate;
D O I：
10.11883/1001-1455(2016)04-0483-08
中图分类号：
学科分类号：
摘要：
By using a split Hopkinson pressure bar (SHPB) technique, impact experiments were carried out on the jointed rock specimens simulated by cement-based mortar specimens. The dynamic responses of the simulated jointed rock material with different joint angles at different strain rates were analyzed including stress-strain curve characteristics, failure modes, energy transmission and dissipation. The experimental results show that, with the increase of strain rate, the dynamic elastic moduli increase, and the specimens become more fragile. The peak intensity decreases with the increase of the joint angles whereas when the strain rate increases to a certain extent, the influence of the joint angles on the rock damage formation is no longer obvious. The incident energy, the reflective energy, the transmission energy, and the dissipation energy of the different specimens nonlinearly increase with the increase of the strain rate. The energy dissipation rates of the specimens with inclination joint angles are higher than those of the intact specimens with the increase of the strain rate. © 2016, Editorial Board of EXPLOSION AND SHOCK WAVES. All right reserved.
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页码：483 / 490
页数：7
相关论文
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