Experimental study on evolution of strain field of explosion stress wave passing through a heterogeneous interface based on the DIC method

YANG Renshu; ZHAO Yong; ZHAO Jie; ZUO Jinjing; GE Fengyuan; CHEN Cheng; DING Chenxi

doi:10.11883/bzycj-2022-0097

Volume 42 Issue 12

Dec. 2022

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Article Navigation > Explosion And Shock Waves > 2022 > 42(12): 123201

Zhai Chao -jiao, Xia Tang -dai, Chen Wei -yun, Du Guo -qing. Transient response of cavity in infinite elastic soil to anti -plane impact[J]. Explosion And Shock Waves, 2014, 34(2): 209-215. doi: 10.11883/1001-1455(2014)02-0209-07

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YANG Renshu, ZHAO Yong, ZHAO Jie, ZUO Jinjing, GE Fengyuan, CHEN Cheng, DING Chenxi. Experimental study on evolution of strain field of explosion stress wave passing through a heterogeneous interface based on the DIC method[J]. Explosion And Shock Waves, 2022, 42(12): 123201. doi: 10.11883/bzycj-2022-0097

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Experimental study on evolution of strain field of explosion stress wave passing through a heterogeneous interface based on the DIC method

doi: 10.11883/bzycj-2022-0097

YANG Renshu^{1, 2
,},
ZHAO Yong^{1, 2
,
,},
ZHAO Jie³,
ZUO Jinjing^{1, 2},
GE Fengyuan^{1, 2},
CHEN Cheng^{1, 2},
DING Chenxi^{1, 4}

1.
School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
2.
Beijing Key Laboratory of Urban Underground Space Engineering, University of Science and Technology Beijing, Beijing 100083, China
3.
Tianjin Hongtai Huakai Science and Technology Co. Ltd., Tianjin 301913, China
4.
Hubei Key Laboratory of Blasting Engineering, Jianghan University, Wuhan 430056, Hubei, China

Received Date: 2022-03-14
Rev Recd Date: 2022-06-26

Available Online: 2022-09-05

Publish Date: 2022-12-08

Abstract

Abstract

Chloroform was used to bond a polycarbonate (PC) plate and a polymethylmethacrylate (PMMA) plate to fabricate a model with a heterogeneous cemented interface. A cylinder blasthole was set in the PC plate with a certain angle to the interface. Base on the locations between the interface and the explosive initiation points, two kinds of initiation methods were used in the experiment. The one is the top initiation method, in which the initiation point is settled far away from the interface; and the other is the bottom initiation method, in which the initiation point is close to the interface. The digital image correlation (DIC) method was used to study the evolution of the strain field during the passage of the blast waves in the medium with the heterogeneous interface. The results show that the propagation pattern of the blast stress wave varies significantly after it passes through the interface. In the top initiation, a stress concentration zone is formed on the interface under blast loadings, and induce a crack initiate at the interface. The transverse tensile wave is the main reason for the cracking of the interface. Besides, it can be found that the initiation methods have different contributions to both the magnitude and the locations of the tensile/compressive strain in both the transverse and longitudinal directions. Moreover, in the bottom area of the borehole, the influence of the initiation method on the time-related characteristics of the strain field mainly has two aspects, namely, the duration time and the strain magnitude. And it is found that the transverse/longitudinal strain is of "short duration, high magnitude" variation characteristic for the top initiation. In terms of the strain magnitude, the influence of the initiation method on the transverse strain is much greater than it on the longitudinal strain. In addition, the initiation method can significantly influence the attenuation characteristics of the strain field, which is more obvious for the longitudinal strain field. In terms of the attenuation rate, the magnitude blast stress waves attenuated faster in the PC plate, whereas the blast stress waves attenuated slowly when it passed through the interface and propagated in the PMMA plate regardless of the initiation method.
- digital image correlation,
- blast stress wave,
- heterogeneous interface,
- initiation method,
- model experiment

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References

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