Impact testing technique based on the principle of electromagnetic induction

CHEN Xu; LI Ziqi; WU Yadong; WANG Jingbo; LI Yulong; GUO Yazhou

doi:10.11883/bzycj-2023-0195

Volume 44 Issue 11

Nov. 2024

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SHEN Yan-ming, CHEN Jian-qiang. Numericallysimulatingverificationofthecomparabilityruleonhypervelocityimpact[J]. Explosion And Shock Waves, 2011, 31(4): 343-348. doi: 10.11883/1001-1455(2011)04-0343-06

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CHEN Xu, LI Ziqi, WU Yadong, WANG Jingbo, LI Yulong, GUO Yazhou. Impact testing technique based on the principle of electromagnetic induction[J]. Explosion And Shock Waves, 2024, 44(11): 114101. doi: 10.11883/bzycj-2023-0195

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Impact testing technique based on the principle of electromagnetic induction

doi: 10.11883/bzycj-2023-0195

CHEN Xu^1
,,
LI Ziqi¹,
WU Yadong²,
WANG Jingbo¹,
LI Yulong^{1, 3, 4},
GUO Yazhou^{1, 3
,
,}

1.
School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, China
2.
Beijing Institute of Aerospace System Engineering, Beijing 100076, China
3.
Shaanxi Impact Dynamics and Engineering Application Laboratory, Xi’an 710072, Shaanxi China
4.
School of Civil Aviation, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, China

Received Date: 2023-05-25
Rev Recd Date: 2024-03-03

Available Online: 2024-06-24

Publish Date: 2024-11-15

Abstract

Abstract

Based on the basic principles of electromagnetic induction, an impact device is proposed that generates high-amplitude and long-pulse acceleration loads driven by electromagnetic forces. The impact device goes to make up for the shortcomings of the current stage of ground impact test technology. The disadvantages of the current stage of ground impact test technology include mainly time-consuming, high cost, low repeatability and controllability, and it is difficult to continuously improve the pulse width of acceleration load. Acceleration impact tests were performed using an electromagnetic Hopkinson bar, and the working process of the device from the generation of electromagnetic force to its transformation into impact load was analyzed. In the acceleration impact test, the stress on the bar was obtained by strain gauges and the acceleration loads at the end of the bar were obtained by acceleration transducers. A plurality of test results without loss of repeatability. The classical one-dimensional stress wave theory for predicting the relationship between acceleration and stress in slender bars is developed. Comparative analysis against experimental data are presented to demonstrate the effectiveness of the present approach. The electromagnetic Hopkinson bar acceleration impact test was numerically simulated using COMSOL finite element software, and the simulation results showed good consistency with the experimental results, indicating that the numerical model could simulate this kind of impact test more accurately and verifying the accuracy of the numerical model. Based on this finite element model, an impact device that generates high-amplitude, long-pulse acceleration is proposed, and numerical simulations of the device are carried out at different voltages and capacitances. The simulation results show that the device is able to generate the required acceleration. The acceleration amplitude increases with increasing capacitance voltage and the acceleration pulse width increases with increasing capacitance value. By regulating the values of the circuit parameters, the device can generate acceleration loads with different amplitudes and pulse widths.
- Electromagnetic induction,
- Electromagnetic Hopkinson bar,
- High-amplitude, long-pulse,
- Impact test

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References(19)

References

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