Damage Effect of W/Zr/Ti Reactive Fragments on Spaced Targets

doi:10.12382/bgxb.2023.0289

Abstract

Abstract:

In order to study the coupling damage mechanism of W/Zr/Ti reactive fragments after penetrating a target, a ballistic gun experiment is conducted to investigate the penetration of W/Zr/Ti reactive fragments into a spaced target composed of 6mm-thick Q235 steel plate and 1.5mm-thick aluminum plate. Combined with the impact reaction theory of reactive fragments and the principle of energy conservation, the target deformation energy is calculated and the contributions of chemical energy and kinetic energy to coupled damage are analyzed from the perforation mode of steel targets, the damage mode of after-effect aluminum targets, and high-speed photography of reactive fragments penetrating the spaced targets. The research results show that, the slug and debris cloud cause bulge, perforation, and ablation damage on the aluminum target when an active fragment hits the target at a speed of less than 800m/s. When the target hits the target at a speed of more than 1187m/s, the aluminum target undergoes shear perforation under the action of the front steel target plug, resulting in bulge, cracks, and petal warping under the coupling damage of kinetic and chemical energies of debris cloud. With the increase of the target velocity, the damage area of rear target and the reaction degree of active fragment show an increasing trend, and the contribution of chemical energy to coupled damage gradually increases.

Key words: W/Zr/Ti reactive fragment, penetration, damage effect, spaced target

CLC Number:

TJ012.4

WANG Zaicheng, XU Yi, JIANG Chunlan, HU Rong, HE Zheng. Damage Effect of W/Zr/Ti Reactive Fragments on Spaced Targets[J]. Acta Armamentarii, 2023, 44(12): 3862-3871.

Figures/Tables 15

Fig.1 Experimental sample

Fig.2 Schematic diagram of experimental target and target structure

Fig.3 Experimental test system and actual layout of the site

Fig.4 Damage morphology of spaced target impacted by tungsten alloy fragment (impact speed: 1414m/s)

Table 1 Damage morphology of spaced target impacted by reactive fragments

Table 2 Experimental data of reactive fragments penetrating spaced targets

序号	破片类型	速度/ (m·s^-1)	前靶穿孔模式	前靶穿孔直径/mm	后靶透光面积/mm²	毁伤区面积/mm²	裂纹数目/条	后靶破坏模式
1	活性破片 (6.35mm×6.35mm×6.35mm)	647	未穿透	未穿透	未穿透	无毁伤	无裂纹	无破坏
2		698	冲塞	9.5	未穿透	无毁伤	无裂纹	无破坏
3		798	冲塞	9.9	未穿透	1078	无裂纹	隆起
4		1187	冲塞	10.2	80	2089	4	隆起+花瓣型
5		1410	冲塞	10.5	526	2872	4	花瓣型
6		1562	冲塞	10.7	979	3631	4	花瓣型
7		1780	冲塞	10.8	1406	5879	4	花瓣型
8	惰性破片 (6.35mm×6.35mm×6.35mm)	1414	冲塞	9.1	200	310	无裂纹	冲塞

Fig.5 Perforation morphology of plug on aluminum target

Fig.6 High-speed photographic images of fragments at critical target penetration speed

Fig.7 Typical high-speed photographic images at different impact speeds

Fig.8 Variation trend of cumulative brightness with time at different velocities

Fig.9 Relationship between reactivity and velocity of debris clouds

Fig.10 Relationship among kinetic energy, reactivity, and velocity of debris clouds

Fig.11 Schematic diagram of damage area and deformation of target plate bulge

Fig.12 Schematic diagrams of petal tear area damage and target plate deformation before cracking

Table 3 Contribution of deformation energy and chemical energy of target plate to coupling damage at different velocities

破片初速/ (m·s^-1)	最大裂纹长度/mm	作用于靶板变形的碎片云动能/J	靶板变形能/J	化学能贡献度
798	无裂纹	38.4	155.8	0.312
1187	10.0	205.4	450.3	0.554
1410	35.2	290.2	723.6	0.601
1562	49.4	360.6	1058.8	0.660
1780	60.3	453.1	1552.3	0.708

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