Numerical Simulation of Fragmentation Process Driven by Explosion in Elliptical Cross-Section Warhead

DENG Yuxuan; ZHANG Xianfeng; FENG Kehua; LIU Chuang; DU Ning; LIU Junwei; LI Pengcheng

doi:10.11858/gywlxb.20210856

Volume 36 Issue 2

Apr 2022

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Chinese Journal of High Pressure Physics > 2022 > 36(2): 025104.

DENG Yuxuan, ZHANG Xianfeng, FENG Kehua, LIU Chuang, DU Ning, LIU Junwei, LI Pengcheng. Numerical Simulation of Fragmentation Process Driven by Explosion in Elliptical Cross-Section Warhead[J]. Chinese Journal of High Pressure Physics, 2022, 36(2): 025104. doi: 10.11858/gywlxb.20210856

Citation:

DENG Yuxuan, ZHANG Xianfeng, FENG Kehua, LIU Chuang, DU Ning, LIU Junwei, LI Pengcheng. Numerical Simulation of Fragmentation Process Driven by Explosion in Elliptical Cross-Section Warhead[J]. Chinese Journal of High Pressure Physics, 2022, 36(2): 025104. doi: 10.11858/gywlxb.20210856

Citation:

DENG Yuxuan, ZHANG Xianfeng, FENG Kehua, LIU Chuang, DU Ning, LIU Junwei, LI Pengcheng. Numerical Simulation of Fragmentation Process Driven by Explosion in Elliptical Cross-Section Warhead[J]. Chinese Journal of High Pressure Physics, 2022, 36(2): 025104. doi: 10.11858/gywlxb.20210856

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Numerical Simulation of Fragmentation Process Driven by Explosion in Elliptical Cross-Section Warhead

doi: 10.11858/gywlxb.20210856

1.
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
Jiangsu Yongfeng Machinery Co. Ltd., XuYi 211722, Jiangsu, China

Received Date: 01 Aug 2021
Rev Recd Date: 19 Aug 2021
Accepted Date: 23 Aug 2021

Abstract

Abstract

In order to study the expand-rupturing process and the radial velocity distribution of the elliptical cross-section natural fragment warhead shell driven by detonation, a three-dimensional model of the elliptical cross-section warhead was established. The AUTODYN-3D software was used to simulate the expansion and rupture process of the elliptical cross-section natural fragment warhead shell driven by detonation with Lagrange algorithm. The relationship between the minor-major axis fracture time difference and the minor-major axis ratio under the single-point central initiation mode of the end face was studied. The influence of initiation points, minor-major axis ratio and loading ratio (i.e. the mass ratio of charge and shell) on the radial velocity distribution of the elliptical cross-section warhead was studied. The results show that compared with the single-point initiation at the center of the end face, the double-point eccentric initiation at the major axis of the end face and the four-point eccentric initiation at the minor axis of the end face, the double-point eccentric initiation at the minor axis of the end face has the best effect on the radial velocity gain of the elliptical cross-section warhead shell. When the loading ratio is constant, the fracture time of the minor and major axes and the difference between the fracture time of the minor and major axes are linearly related to the minor and major axis ratio. Meanwhile, the real-time minor and major axis ratio of the cross-section shape during the expansion of the warhead shell varies linearly with loading time. The radial velocity distribution of warhead shell fragments decreases with the increase of minor-major axis ratio. When the ratio of minor axis to major axis is constant and the loading ratio is less than 1, the fragment velocity increases sinusoidally with the increase of azimuth angle, and the difference of fragment velocity in minor and major axes shows a linear relationship with the loading ratio.
- elliptical cross-section warhead,
- natural fragmentation,
- expand-rupturing,
- numerical simulation,
- fragment velocity

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References

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Numerical Simulation of Fragmentation Process Driven by Explosion in Elliptical Cross-Section Warhead

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