Behavior of Segmented Projectile Penetrating into Ceramic/Steel Composite Armor

doi:10.12382/bgxb.2023.0274

Abstract

Abstract:

A two-stage segmented core structure is designed for the phenomena of deformation and fragmentation of armor-piercing core during the impact of a high-speed projectile on a target plate, and the finite element analysis software is used to numerically simulate the penetration of two-stage core structure into the ceramic/steel composite target plate. The stage analysis of the penetration process is carried out based on the damage pattern of target and the motion law of two-stage core structure, and the influences of core length ratio, spacing and other factors on the penetration performance of two-stage core structure are discussed. The results show that the increase in the penetration depth of two-stage core structure can reach more than 16% compared with that of the ordinary core. It is found that the length ratio and spacing of two-stage cores have a great influence on the penetration effect, and the selection of reasonable length ratio and spacing can help improve the penetration performance of two-stage segmented projectiles on ceramic/steel composite target plates.

Key words: segmented core, fragmentation of projectile, ceramic/steel composite target plate, penetration behavior

CLC Number:

TJ301

WANG Mingyang, ZHENG Yuxuan, LI Tianpeng, CHEN Chun, WANG Yuanchao. Behavior of Segmented Projectile Penetrating into Ceramic/Steel Composite Armor[J]. Acta Armamentarii, 2023, 44(12): 3667-3675.

Figures/Tables 17

Fig.1 Basic structure of two-stage core structure penetrating ceramic/steel target plate

Fig.2 Finite element model of two-stage core structure penetrating ceramic/steel composite target plate

Table 1 Material parameters of T12A[24], 6061 aluminum alloy and 45 # steel

材料	ρ/ (g·cm^-3)	G/ GPa	ν	A/ GPa	B/ GPa	n
T12A钢	7.80	82.00	0.30	1.54	0.48	0.18
6061铝合金	2.70	27.60	0.33	0.15	0.20	0.33
45号钢	7.85	77.00	0.33	0.71	0.56	0.51
材料	C	m	D₁	D₂	D₃	D₄
T12A钢	0.012	1.00	0.15	0.72	-0.66	0.43
6061铝合金	0.03	1.44	0.63	-4.57× 10^-6	17.43	0.01
45号钢	0.037	0.698	0.10	0.74	1.57	0.005

Table 2 Material parameters of Al2O3 ceramic panel[25]

材料	ρ/ (g·cm^-3)	G/ GPa	K₁/ GPa	K₂/ GPa	K₃/ GPa	σ_HEL/ GPa	β
Al₂O₃	3.89	152	231	5.1	0.26	6.57	1
A	N	C	B	M	D₁	D₂	S_fmax
0.88	0.64	0.007	0.28	0.6	0.01	0.7	0.2045

Fig.3 Simulation model

Fig.4 Comparison of experimental target plate and projectile damages(The upper part is the test results, and the lower part is the simulated results)

Table 3 Comparison between experimental and numerically simulated results

序号	仿真靶板设置	速度/ (m·s^-1)	DOP 试验值/ mm	DOP 仿真值/ mm	仿真结果偏差/%
1	70mm铝合金	758	26.85	27.62	2.80
2	10mmAl₂O₃陶瓷+ 30mm铝合金(无约束)	764	8.37	8.11	3.10
3	10mmAl₂O₃陶瓷+ 30mm铝合金(侧向约束)	763	6.87	7.26	5.67

Fig.5 Motion curves of two-stage core structure

Fig.6 The process of two-stage core structure penetrating ceramic/steel composite target plate

Fig.7 Pit opening process of two-stage core structure penetrating ceramic/steel composite target plate

Fig.8 Response mechanism of two-stage projectile core structure penetrating into ceramic/steel composite target plate

Fig.9 Stage of two-stage core structure penetrating into steel backplane

Fig.10 Separate penetration stage of post-stage core

Fig.11 Penetration depth and morphology characteristics under different core length ratios

Table 4 Influence of different core length ratio on penetration depth

侵彻速度/ (m·s^-1)	弹芯长度比例/ mm	侵彻深度/ mm	侵彻深度提升率/%
700	0/50(普通)	24.29
700	5/45	27.60	13.63
700	10/40	22.43	-7.69
700	15/35	21.83	-10.12
700	20/30	22.43	-7.69

Fig.12 Penetration depth diagram of two-stage core structure under different core length ratios and different core spacings

Table 5 Penetration depths of two-stage core structure under different core length ratios and different core spacings mm

弹芯比例	间距/mm
弹芯比例	1	3	5	10
0/50	24.29
5/45	27.60	28.30	27.63	28.30
10/40	22.43	21.24	19.53	24.19
15/35	21.83	24.93	24.30	23.67
20/30	22.43	25.37	25.12	26.91

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