Enhanced Opening Behavior of Reactive PELE Penetrating into Reinforced Concrete Target

doi:10.12382/bgxb.2024.0307

Abstract

Abstract:

The reactive penetrator with enhanced lateral effect (PELE) exhibits a violent deflagration reaction when penetrating the reinforced concrete target,and the opening effect of it penetrating into the reinforced concrete target is more obvious than that of the inert filling PELE.To reveal the enhanced opening mechanism of reactive PELE,an enhanced opening model of reactive PELE penetrating into the reinforced concrete target is presented,which fully considers the radial rarefaction and the deflagration reaction of filling.The experiments of reactive PELE penetrating into the reinforced concrete targets at five impact velocities are carried out.The reaction characteristics of filling,the deformation angle-length evolution of shell,and the enhanced opening behavior are discussed based on the experimental and theoretical results.The results show that the proposed model can effectively predict the shell deformation and the target opening diameter,which the average errors are 6.9% and 8.5%,respectively.The reactive PELE shell exhibits double bending deformation and curling deformation modes,and the deformation angle-length evolution of shell is given.When the impact pressure exceeds than 2.32GPa,the neglect of the radial rarefaction wave may overestimate the reaction level of reactive PELE filling and the radial deformation of shell.The deflagration reaction of the reactive PELE filling increases the maximum opening diameter by 24.3%.

Key words: reactive penetrator with enhanced lateral effect, reinforced concrete target, radial rarefaction, shell deformation, deflagration opening

CLC Number:

TJ410.3

ZHANG Jiahao, WANG Haifu, GE Chao, ZHOU Sheng, YU Qingbo. Enhanced Opening Behavior of Reactive PELE Penetrating into Reinforced Concrete Target[J]. Acta Armamentarii, 2025, 46(3): 240307-.

Figures/Tables 25

Fig.1 Impact response of PELE shell under different loads

Fig.2 Wave interaction after collision

Fig.3 Generation mechanism of radial rarefaction wave

Fig.4 Penetration opening and shear plugging physical process

Fig.5 Solving procedure

Fig.6 Preparation of reactive PELE filling

Fig.7 Structure of reactive PELE

Table 1 Structural parameters of reactive PELE

壳体长度 L_j/mm	壳体厚度 d₀/mm	壳体外径 R₀/mm	壳体内径 R₁/mm	芯体长度 L_f/mm	刻槽长度 L_g/mm
282.5	12.5	52.5	40	270	190

Fig.8 Concrete target

Fig.9 Experimental principle

Fig.10 Typical high-speed photographies

Fig.11 Damage mode and target damage under different velocities

Table 2 Target damage parameters

速度/ (m·s^-1)	开孔直径/mm	前坑直径 /mm	后坑直径 /mm
592s	456.3	768.4	925.2
702s	502.6	781.6	1016.2
795s	540.8	845.1	1126.9
910s	512.6	866.7	1201.5
1012s	468.1	888.5	1256.1

Fig.12 Maximum firelight at different velocities

Fig.13 Relationships between velocity and L1,L2,L3 and L4

Fig.14 Deformation mode of reactive PELE shell

Fig.15 Deformation of reactive PELE shell at 795m/s

Fig.16 Key deformation parameter of shell

Fig.17 Evolution of shell deformation angle

Fig.18 Evolution of shell deformation length

Table 3 Shell deformation angle

速度/ (m·s^-1)	α		平均误差/%	β₁		平均误差/%	β₂		平均误差
速度/ (m·s^-1)	实验结果	模型计算结果	平均误差/%	实验结果	模型计算结果	平均误差/%	实验结果	模型计算结果	平均误差
592	22.1	24.1	5.8	44.2	42.5	6.8	0	0
702	38.3	35.6		34.5	37.6		0	0
795	44.8	45.2		36.8	38.6		90	90
910	46.1	49.5		23.6	24.5		90	90
1 012	60.2	57.2		20.5	18.5		90	90

Table 4 Shell deformation length

速度/ (m·s^-1)	l_JE		平均误差/%	l_JB1		平均误差/%	l_JB2		平均误差/%
速度/ (m·s^-1)	实验结果	模型计算结果	平均误差/%	实验结果	模型计算结果	平均误差/%	实验结果	模型计算结果	平均误差/%
592	62.3	59	7.5	72.5	82	8.1	0	0	6.2
702	86.5	93		68.8	63		0	0
795	94.2	98		36.2	34		59.9	62
910	80.4	90		42.5	46		84.2	76
1 012	95.2	86.8		34.4	36		116.5	110

Fig.19 Maximum radial diameter of PELE shell after impacting the target

Fig.20 Radial deformation of shell and opening diameter of target

Fig.21 Extended validation of model validity

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