Effects of strength ratio on energy dissipation of quasi-composite rock samples under impact load

被引：0
|
作者：
Wen S. [1 ,2 ]
Wu F. [1 ]
Li S. [1 ]
Sheng G. [1 ,2 ]
机构：
[1] College of Civil Engineering and Architecture, Henan University, Kaifeng
[2] Henan Provincial Engineering Research Center of Rail Transit Intelligent Construction, Kaifeng
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2023年 / 42卷 / 13期
关键词：
different incidence angles; energy dissipation; quasi-composite rock samples; split Hopkinson pressure bar (SHPB); strength ratios;
D O I：
10.13465/j.cnki.jvs.2023.13.013
中图分类号：
学科分类号：
摘要：
Here, dynamic impact tests of quasi-composite rock samples were conducted by using split Hopkinson pressure bar (SHPB) test device with a diameter of 50 mm to study effects of different strain rates, different incident sequences of incident waves, different strength ratios and different incident angles on energy dissipation of rock body. The test results showed that incident energy, absorption energy and energy utilization rate of quasi-composite rock samples increase with increase in strain rate; different incident sequences have different effects on absorption energy and energy utilization rate, and with increase in strength ratio, effects of different incident sequences decrease gradually; when the strain rate is about 270 s-1, energy utilization rates of quasi-composite rock samples with different strength ratios decrease firstly and then increase with increase in incident angle, when the incident angle is 30°, the energy utilization rate is the smallest, and when the incident angle is 90°, the energy utilization rate is the largest. © 2023 Chinese Vibration Engineering Society. All rights reserved.
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页码：111 / 118
页数：7
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