Constant strain-rate loading of liquid-driving expanding ring

LI Jiahao; XU Bian; ZHENG Yuxuan; ZHOU Fenghua

doi:10.11883/bzycj-2022-0160

Volume 43 Issue 2

Feb. 2023

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LI Jiahao, XU Bian, ZHENG Yuxuan, ZHOU Fenghua. Constant strain-rate loading of liquid-driving expanding ring[J]. Explosion And Shock Waves, 2023, 43(2): 024101. doi: 10.11883/bzycj-2022-0160

Citation:

LI Jiahao, XU Bian, ZHENG Yuxuan, ZHOU Fenghua. Constant strain-rate loading of liquid-driving expanding ring[J]. Explosion And Shock Waves, 2023, 43(2): 024101. doi: 10.11883/bzycj-2022-0160

LI Jiahao, XU Bian, ZHENG Yuxuan, ZHOU Fenghua. Constant strain-rate loading of liquid-driving expanding ring[J]. Explosion And Shock Waves, 2023, 43(2): 024101. doi: 10.11883/bzycj-2022-0160

Citation:

LI Jiahao, XU Bian, ZHENG Yuxuan, ZHOU Fenghua. Constant strain-rate loading of liquid-driving expanding ring[J]. Explosion And Shock Waves, 2023, 43(2): 024101. doi: 10.11883/bzycj-2022-0160

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Constant strain-rate loading of liquid-driving expanding ring

doi: 10.11883/bzycj-2022-0160

LI Jiahao^1
,,
XU Bian¹,
ZHENG Yuxuan^{1, 2
,
,},
ZHOU Fenghua¹

1.
MOE Key Laboratory of Impact and Safety Engineering, Ningbo University, Ningbo 315211, Zhejiang, China
2.
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

Received Date: 2022-04-15
Rev Recd Date: 2022-09-19

Available Online: 2022-09-20

Publish Date: 2023-02-25

Abstract

Abstract

The expanding ring experimental technology mainly refers to the explosion expanding ring and the electromagnetic expanding ring experimental technology. During the experiment, the loading strain rate of the expansion ring decreases rapidly with the expansion of the ring after reached the peak value, which creates great inconvenience to the study of tension fragmentation of strain-rate sensitive solids. In this paper, a constant strain-rate loading technology is developed on the basis of the liquid-driving expanding ring experimental technology. Since it is not possible to apply sudden loading to the expansion ring during the experiment, it is assumed that the strain rate of the expansion ring during the expansion process is divided into linear growth stage and stable stage of the strain rate. By reasonably controlling the loading velocity and loading time of the liquid, an approximate expression of the liquid-driving loading curve required to realize the constant strain-rate expansion of the metal ring is deduced theoretically. The tension fragmentation process of the 1060-O aluminum ring under liquid-driving loading is simulated by the fluid-solid coupling numerical simulation. Under the liquid-driving loading curve, the hoop strain rate of the expanding ring fluctuates within a maximum of 20% in the stable stage of the strain rate. Before occurring of the significant necking of the expansion ring, the circumferential velocity of the expansion ring is basically zero, indicating that the expansion ring is under uniform tensile loading and there is no stress wave propagation in the circumferential direction. When the expansion ring is significantly necked, an obvious sudden change in the circumferential velocity will take place, indicateing that a Mott wave from the fracture site propagates to the corresponding position. The influence of the loading curve on the strain rate during the fracture process is further studied. Then an expanding ring experiment was carried out on the 1060-O aluminum ring on the liquid-driving expanding ring experimental device to verify the feasibility of the constant strain rate loading technology.
- liquid-driving expanding ring,
- constant strain-rate,
- radial velocity,
- tension fragmentation

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References(19)

References

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