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

Li Xianglong; Wang Jianguo; Zhang Zhiyu; Huang Yonghui

doi:10.11883/1001-1455(2016)04-0483-08

Volume 36 Issue 4

Oct. 2018

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Li Xianglong, Wang Jianguo, Zhang Zhiyu, Huang Yonghui. Experimental study for effects of strain rates and joint angles on dynamic responses of simulated rock materials[J]. Explosion And Shock Waves, 2016, 36(4): 483-490. doi: 10.11883/1001-1455(2016)04-0483-08

Citation:

Li Xianglong, Wang Jianguo, Zhang Zhiyu, Huang Yonghui. Experimental study for effects of strain rates and joint angles on dynamic responses of simulated rock materials[J]. Explosion And Shock Waves, 2016, 36(4): 483-490. doi: 10.11883/1001-1455(2016)04-0483-08

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

doi: 10.11883/1001-1455(2016)04-0483-08

1.
Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
2.
College of Civil and Architectural Engineering, Yunnan Agricultural University, Kunming 650201, Yunnan, China
3.
Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China

Received Date: 2015-06-09
Rev Recd Date: 2015-08-13
Publish Date: 2016-07-25

Abstract

Abstract

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.
- solid mechanics,
- dynamic response,
- SHPB,
- jointed rock,
- joint angle,
- strain rate,
- dissipation energy

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References(18)

References

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