Experimental and Numerical Research on Behind-plate Enhanced Lateral Effect of Reactive PELE

doi:10.12382/bgxb.2023.0537

Abstract

Abstract:

To reveal the behind-plate enhanced lateral mechanism of reactive penetrator with enhanced lateral effect (PELE), the damage effect experiment of reactive PELE impacting steel plate is made to obtain the perforation damage of witness aluminum plate set behind the steel plate under the conditions of different front steel plate thicknesses. A two-step numerical simulation model of reactive PELE impact-induced deflagration reaction is developed based on the ignition growth model. The behind-plate enhanced lateral effect of reactive PELE impacting a steel target with a thickness of 6-20mm at 780m/s velocity is discussed by experiment and simulation. The damage effect of witness aluminum plate, filling reaction, wave interaction and jacket fragments dispersion are analyzed. The results show that the numerical simulation model can effectively simulate the deflagration reaction of reactive PELE impacting plate. The perforation dispersion on the witness plate significantly depends on the front steel plate thickness, the behind-plate enhanced lateral effect of the reactive PELE increases first and then decreases with the increase in the plate thickness, and the released energy of the reactive filling increases the maximum radial velocity of jacket fragments by more than 40%.

Key words: reactive enhanced lateral effect penetrator, reactive material, impact-induced deflagration, ignition growth

CLC Number:

TJ410.3

ZHANG Jiahao, GUO Mengmeng, ZHOU Sheng, YU Qingbo. Experimental and Numerical Research on Behind-plate Enhanced Lateral Effect of Reactive PELE[J]. Acta Armamentarii, 2024, 45(7): 2270-2281.

Figures/Tables 22

Fig.1 Reactive PELE projectile structure

Table 1 Structural parameters of reactive PELE

壳体长度 L_s/mm	壳体厚度 H_s/mm	壳体外径 R_O/mm	壳体内径 R_I/mm	芯体长度 L_I/mm	垫块长度 L_T/mm
68.5	4.5	25	16	60	4

Fig.2 Experimental layout

Fig.3 Eestablishment steps of numerical simulation model

Fig.4 Mesh convergence

Table 2 Main Johnson-Cook model parameters

参数	材料
参数	35CrMnSiA	4340钢	2A12	钨合金	PTFE/Al
A/MPa	1327	910	195	1070	8.044
B/MPa	1186	586	230	165	250.6
n	0.0034	0.26	0.31	0.11	1.8
c	0.017	0.014	0.42	0.0028	0.4
m	1.27	1.03	2.20	1	1
T_m/K	1775	1795	775	1723	500
D₁	2	-0.8	0.22	0	0.05
D₂	0	2.1	0.12	0.27	2.00
D₃	0	-0.5	2.8	-3.4	2.00
D₄	0	0.002	—	—	0.002
D₅	0	0.61	—	—	0.61

Table 3 IGNITION_ANG_GROWTH equation of state parameters

参数	数值	参数	数值
a/MPa	4.7355	xp₁	50.466801
F_r	1.7271	r₁/MPa	2.293712×10^-5
r₃	7.7099×10^-5	r₆	51.54 380
F_q	11224	E_m	16.735001
E₁	1.0029	C_vr	9.93×10^-6
C_t	1×10^-6	E_n	26.963
b/MPa	30.6203×10^-5	xp₂	4.92737
g	4.5754×10^-6	r₂/MPa	2.009256×10^-5
r₅	45.292294	A₂	6.3067×10^-5
G₁	5.4521×10⁹	A₁	0
C_vp	1.457×10^-5	E_l	28.399
E₂	1.0002	G₂	8.599×10¹³

Table 4 The damage of witness aluminum target

Table 5 Perforation number and perforation dispersion size of witness plate

靶厚/ mm	穿孔数			穿孔散布尺寸/mm
靶厚/ mm	1号靶	2号靶	3号靶	1号靶	2号靶	3号靶
6	1	2	7	208×196	285×245	370×180
10	8	6	6	262×242	325×320	460×415
15	8	16	12	378×319	540×530	660×615
20	2	2	1	130×90	135×75	128×80

Fig.5 Typical high-speed photographic frame of projectile-target impact

Fig.6 Residual penetrator observed in high-speed photography

Fig.7 Stress wave interaction in projectile-target impact

Fig.8 Wave structure under different projectile-target parameters

Fig.9 Wave propagation characteristics

Fig.10 Typical element position distribution

Fig.11 Pressure-time curve of typical elements inside the plate

Fig.12 Pressure-time curve of typical elements inside the projectile

Fig.13 Pressure-time curve of typical elements inside the reactive filling

Fig.14 Numerical simulation results under different front plate thicknesses

Fig.15 Axial and radial velocity-time curves of fragment under different front plate thicknesses

Table 6 Jacket fragment maximum radial velocity

靶板厚度/mm	仿真值1/(m·s^-1) (模型B)	仿真值2/(m·s^-1) (模型A)	增量占比/%
6	303.5	179.8	68.7
10	327.3	209.6	56.2
15	348.9	235.3	48.2

Fig.16 Calculated results of perforation dispersion diameter on witness plate

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