Coupling Energy Distribution Characteristics of Reactive Fragments Penetrating Rear Target Plate

doi:10.12382/bgxb.2024.0526

Abstract

Abstract:

To reveal the coupling energy distribution characteristics and mechanism of the reactive fragments penetrating the rear target plate, the ballistic gun experiment of the reactive fragment impacting the double-layer target plate is carried out. The bullet-target interactive behavior is recorded with high-speed photography, and a damage behavior model of the reactive fragments impacting the rear target plate is established based on the damage effect of target, the fragmentation theory of the fragments penetrating the target, and the secondary fragment energy distribution. The results show that the kinetic and chemical energies predominate in different impact velocity intervals during the process of reactive fragments impacting the rear target plate. With the increase in impact velocity, the reactive fragments are fully activated, and the damage of reactive fragments to the rear target plate changes from chemical energy to kinetic energy.

Key words: reactive fragment, secondary fragment, dispersion behavior, coupling energy distribution

CLC Number:

TJ012.4

ZHOU Sheng, GUO Mengmeng, ZHANG Jiahao, GE Chao, YU Qingbo. Coupling Energy Distribution Characteristics of Reactive Fragments Penetrating Rear Target Plate[J]. Acta Armamentarii, 2024, 45(S1): 81-88.

Figures/Tables 15

Fig.1 Reactive fragments

Table 1 Performance parameters of reactive fragments

破片组成	质量比	压缩弹性模量/GPa	屈服强度/MPa	断裂强度/MPa	断裂延伸率/%
W/Zr/Ni	3∶5∶2	21	1128	1568	10.1

Fig.2 Experimental target

Fig.3 Schematic diagram of ballistic gun experimental arrangement

Fig.4 Typical target damage area

Table 2 Experimental results of reactive fragments damaging to target plate

实验序号	碰撞速度/ (m·s^-1)	前靶毁伤面积/ mm²	后靶毁伤面积/ mm²
1	741	85.8434	212.3729
2	990	97.8005	795.1094
3	1540	142.1958	1399.112

Fig.5 High-speed photograph at 741m/s

Fig.6 High-speed photograph at 990m/s

Fig.7 High-speed photograph at 1540m/s

Fig.8 The process of reactive fragments penetrating the space targets

Fig.9 Theoretical calculation and high-speed photographs of secondary fragment cloud of reactive fragments at the impact velocity of 1013m/s

Fig.10 Theoretical calculation and high-speed photographs of secondary fragment cloud of reactive fragments imaging at at the impact velocity of 1540m/s

Table 3 Kinetic energy density and activation mass density in the damaged area of the rear target

实验序号	碰撞速度/ (m·s^-1)	比动能/ (J·mm^-2)	激活质量密度/ (g·cm^-2)
1	741		0.4012
2	990	1.9297	0.3876
3	1540	2.1303	0.2838

Fig.11 Kinetic energy density and activation mass density distribution of secondary fragments

Fig.12 Rear target area damaged by reactive fragments

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