A novel method for determining strain rate of concrete-like materials in SHPB experiment

HU Liangliang; HUANG Ruiyuan; GAO Guangfa; JIANG Dong; LI Yongchi

doi:10.11883/bzycj-2018-0142

Volume 39 Issue 6

Jun. 2019

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HU Liangliang, HUANG Ruiyuan, GAO Guangfa, JIANG Dong, LI Yongchi. A novel method for determining strain rate of concrete-like materials in SHPB experiment[J]. Explosion And Shock Waves, 2019, 39(6): 063102. doi: 10.11883/bzycj-2018-0142

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HU Liangliang, HUANG Ruiyuan, GAO Guangfa, JIANG Dong, LI Yongchi. A novel method for determining strain rate of concrete-like materials in SHPB experiment[J]. Explosion And Shock Waves, 2019, 39(6): 063102. doi: 10.11883/bzycj-2018-0142

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A novel method for determining strain rate of concrete-like materials in SHPB experiment

doi: 10.11883/bzycj-2018-0142

HU Liangliang^1
,,
HUANG Ruiyuan^{1, 2
,
,},
GAO Guangfa¹,
JIANG Dong^{2, 3},
LI Yongchi²

1.
National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, Anhui, China
3.
Beijing Institute of Space Long March Vehicle, Beijing 100076, China

Received Date: 2018-04-26
Rev Recd Date: 2018-06-22

Available Online: 2019-07-25

Publish Date: 2019-06-01

Abstract

Abstract

In this paper, we performed SHPB experiments on concrete-like materials with different strengths (C20, C45, C70) and different steel fiber contents (0%, 0.75%, 1.50%, 4.50%) and analyzed the data drawn. The results showed that the constant strain rate corresponding to the experimental data was co-related with the whole-stage average strain rate to a certain degree and therefore the former could be determined by the 1.38 times of the latter. This method was verified as rational by the comparative analysis of the experimental data of non-constant strain rate with the experimental data of constant strain rate. It was also found that, at the constant strain rate in a relatively short loading time, it is unreasonable to characterize the strain rate corresponding to the experimental data using the constant strain rate corresponding to the short platform stage. In this case, the method proposed in this paper offers a good choice.
- concrete,
- SHPB,
- strain rate effect,
- dynamic mechanical behavior

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References(28)

References

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