Continuous resistance test method in determining the attitude of flyer plate driven by sliding detonation

LI Kebin; DONG Xinlong; WANG Yonggang; CHEN Xiang; LI Xiaojie

doi:10.11883/bzycj-2020-0151

Volume 41 Issue 5

May 2021

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LI Kebin, DONG Xinlong, WANG Yonggang, CHEN Xiang, LI Xiaojie. Continuous resistance test method in determining the attitude of flyer plate driven by sliding detonation[J]. Explosion And Shock Waves, 2021, 41(5): 054102. doi: 10.11883/bzycj-2020-0151

Citation:

LI Kebin, DONG Xinlong, WANG Yonggang, CHEN Xiang, LI Xiaojie. Continuous resistance test method in determining the attitude of flyer plate driven by sliding detonation[J]. Explosion And Shock Waves, 2021, 41(5): 054102. doi: 10.11883/bzycj-2020-0151

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Continuous resistance test method in determining the attitude of flyer plate driven by sliding detonation

doi: 10.11883/bzycj-2020-0151

1.
Key Laboratory of Impact and Safety Engineering of Ministry of Education, Ningbo University, Ningbo 315211, Zhejiang, China
2.
Institute of Pulsed Power Science, Kumamoto University, Kumamoto 860-8555, Japan
3.
State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian 116024, Liaoning, China

Received Date: 2020-05-15
Rev Recd Date: 2020-07-27

Available Online: 2021-04-21

Publish Date: 2021-05-05

Abstract

Abstract

The attitude measurement of a flyer plate is the basis for explosive welding mechanism study. Besides, the key parameters affecting the quality of explosive welding products in the actual explosive processing, including the collision point velocity, the dynamic angle of collision and the impact velocity of the flyer plate, must be determined on the premise by measuring the deformation curve of the flyer plate. Despite the readily available device and convenient operation, the measuring process of the traditional electrical method is easily disturbed by external uncertain factors, and susceptible to bending waves generated by the resistance wire itself. In view of the above shortcomings, a velocity probe-based method was innovatively developed for determining the flyer plate motion of explosive welding in the field. First of all, a velocity probe-based test device, which can effectively suppress the generation and influence of electromagnetic radiation, metal jet and bending wave, was designed and the geometric relationship between the probe data and the flyer plate motion curve was established. After that, three types of trapezoidal velocity probes with different structures were developed, whose conducting pressure and response time were analyzed by the finite element program. Based on the analysis results, two sets of explosive welding experiments were carried out for the three types of probes. The experimental results show that the test performance of the first type (without conducting medium) and the second type (threaded wire type) are not ideal, and there are a lot of data oscillation in the test curves, while the third type of probes (metal mesh type) overcomes the shortcomings of the above two types of probes, whose test curves are smooth without oscillation. The motion attitude curve of the flyer plate was then obtained based on the results of the metal mesh probe, which was in good agreement with the calculation results by Richter's simplified model. The present test method makes it possible to determine detonation velocity and flyer plate attitude continuously, reliably and rapidly, which provides a supplement for the study of the driving problem of sliding detonation and the equation of state of detonation products.
- mechanics of explosion,
- explosive welding,
- sliding detonation,
- flyer plate attitude,
- continuous resistance probe

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References(19)

References

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