Calculation method and influencing factors of the fragmental radial velocities of PELE after penetrating thin target

Fan Zijian; Ran Xianwen; Tang Wenhui; Yu Guodong; Chen Weike; Ren Caiqing

doi:10.11883/1001-1455(2017)04-0621-08

Volume 37 Issue 4

May 2017

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Fan Zijian, Ran Xianwen, Tang Wenhui, Yu Guodong, Chen Weike, Ren Caiqing. Calculation method and influencing factors of the fragmental radial velocities of PELE after penetrating thin target[J]. Explosion And Shock Waves, 2017, 37(4): 621-628. doi: 10.11883/1001-1455(2017)04-0621-08

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Calculation method and influencing factors of the fragmental radial velocities of PELE after penetrating thin target

doi: 10.11883/1001-1455(2017)04-0621-08

1.
College of Basic Education Commanding Officer, National University of Defense Technology, Changsha 410072, Hunan, China
2.
College of Science, National University of Defense Technology, Changsha 410073, Hunan, China
3.
State-Operated 806 Company of Guangdong, Foshan 528231, Guangdong, China

Received Date: 2015-11-17
Rev Recd Date: 2016-04-18
Publish Date: 2017-07-25

Abstract

Abstract

Based on an analysis of the PELE (penetrator with enhanced lateral efficiency) penetrating thin metal targets, the deformation process of the front-end projectile was divided into two distinct phases: one-dimensional decomposition in the axial direction and the free conversion in the radial direction, for experimental study. Based on the shock wave theory, we obtained the shock wave compression energy of the front end of the projectile and, on the basis of the conservation of energy and the assumption of two-stage deformation, presented a method for determining the scattered radial velocity of the PELE jacket fragments behind the target. The calculated results in a variety of conditions are fairly consistent with the experimental results. The theoretical analysis showed that the maximum radial velocity of the PELE jacket fragments depends on the radial expansion of both the jacket and the filling part under the shock compression, the former playing a major role in the overall expansion of the projectile whereas the maximum radial velocity of the PELE jacket fragments increasing with the bulk modulus and the Poisson's ratio of the jacket and the filling part. The results suggest that the lateral expansion of both the jacket and the filling part should be taken into account when calculating the radial velocity of the PELE fragments.
- penetration mechanics,
- penetrator with enhanced lateral efficiency,
- shock wave,
- fragments

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References(21)

References

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