Mechanism of hermetic single-cell structure interfering with shaped charge jet

On the basis of visual origin, shock wave reflection, and jet interference theories, this study aims to (1) divide the process of jet penetration into a hermetic single-cell structure into six parts, (2) establish a theoretical model of a single-cell structure interacting with a jet during its penetration into a structure, and (3) obtain the time expressions of a hermetic single-cell structure interfering with a jet. A residual penetration experiment is conducted to verify the accuracy of the model.

Keywords
shaped charge jet; interference range; single cell structure; anti-penetration performance

Authorship

Guo Min

School of Mechanical Engineering, Nanjing University of Science and Technology, Xiaolingwei 200, Nanjing 210094, China. E-mail: Pysguomin@sina.com, zuxudong9902@mail.njust.edu.cn, huangyue@mail.njust.edu.cn, sxj_1959@126.comNanjing University of Science and TechnologyChinaXiaolingwei, Nanjing, ChinaSchool of Mechanical Engineering, Nanjing University of Science and Technology, Xiaolingwei 200, Nanjing 210094, China. E-mail: Pysguomin@sina.com, zuxudong9902@mail.njust.edu.cn, huangyue@mail.njust.edu.cn, sxj_1959@126.com

Unit 63961 Peoples Liberation Army 6th Beiyuan Road, Chaoyang Beijing, 100012, P. R. ChinaPeoples Liberation ArmyP. R. ChinaChaoyang, Beijing, P. R. ChinaUnit 63961 Peoples Liberation Army 6th Beiyuan Road, Chaoyang Beijing, 100012, P. R. China

Zu Xu-dong ^**Corresponding author

Huang Zheng-xiang

Shen Xiao-jun

*Corresponding author

SCIMAGO INSTITUTIONS RANKINGS

Figures | Tables

Figures (8)
Tables (3)

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Fig. 1
Shock wave propagation diagram

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Fig. 2
Photograph of the standard shaped charge with a diameter of 56 mm

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Fig. 3
DOP experimental setup with the velocity sensors to measure the velocity of the SCJ tip

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Fig. 4
Double flash X-ray exposures of the SCJ at 30 and 50 µs after initiation (all dimensions in mm)

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Fig. 5
Full-of-liquid single-cell structure

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Fig. 6
Vertical penetration of jet into single-cell structure

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Fig. 7
Site layout of the residual penetration experiment

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Fig. 8
Hole formed in witness target by jet

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Table 1
Results of the shaped charge performance experiment

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Table 2
Mechanical properties of 45# steel and material parameters of 0# diesel oil

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Table 3
Residual penetration of the jet effect on witness target

Fig. 1 Shock wave propagation diagram

Fig. 2 Photograph of the standard shaped charge with a diameter of 56 mm

Fig. 3 DOP experimental setup with the velocity sensors to measure the velocity of the SCJ tip

Fig. 4 Double flash X-ray exposures of the SCJ at 30 and 50 µs after initiation (all dimensions in mm)

Fig. 5 Full-of-liquid single-cell structure

Fig. 6 Vertical penetration of jet into single-cell structure

Fig. 7 Site layout of the residual penetration experiment

Fig. 8 Hole formed in witness target by jet

Table 1 Results of the shaped charge performance experiment

No.	Standoff (mm)	Velocity of jet tip (m/s)	Depth of penetration (mm)
1	80	6470	182
2	80	6470	185
3	80	6470	186
Average	80	6470	184.3
5	330	6470	224
6	330	6470	219
7	330	6470	221
Average	330	6470	221.3

Table 2 Mechanical properties of 45# steel and material parameters of 0# diesel oil

Material	Density (g/cm³)	Tensile strength (MPa)	Yield strength (MPa)	Elongation at break (%)
45# steel	7.83	630	370	17
Material	Density (g/cm³)	Viscosity (mm²/s)	Burning point (°C)	Solidifying point (°C)
0# diesel oil	0.837	3.0-8.0	285	-1-0

Table 3 Residual penetration of the jet effect on witness target

Serial number	Experiment results of residual penetration/mm	Theoretical calculation velocity of jet undisturbed range	Theoretical calculation velocity of jet interference range	Theoretical calculation of residual penetration/mm
1 2 3	161 156 158	6300m/s~3351m/s 2651m/s~1179m/s	2695 m/s~3351 m/s	159.6

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Mechanism of hermetic single-cell structure interfering with shaped charge jet

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[1] *Corresponding author