Numerical simulation and experimental study of the damage law of EFP warhead charging of cylindrical shells under different angles

Kun Zhang; Changxiao Zhao; Chong Ji; Shaoguang Zhang; Xin Wang; Tao Jiang; Gang Wu

doi:10.1590/1679-78256910

Numerical simulation and experimental study of the damage law of EFP warhead charging of cylindrical shells under different angles

Authors

Kun Zhang College of Field Engineering, Army Engineering University of PLA, Nanjing 210007, China https://orcid.org/0000-0003-0302-4262
Changxiao Zhao College of Field Engineering, Army Engineering University of PLA, Nanjing 210007, China https://orcid.org/0000-0002-4545-4618
Chong Ji College of Field Engineering, Army Engineering University of PLA, Nanjing 210007, China https://orcid.org/0000-0003-3428-6302
Shaoguang Zhang College of Field Engineering, Army Engineering University of PLA, Nanjing 210007, China https://orcid.org/0000-0001-8850-1982
Xin Wang College of Field Engineering, Army Engineering University of PLA, Nanjing 210007, China https://orcid.org/0000-0002-9572-9288
Tao Jiang College of Field Engineering, Army Engineering University of PLA, Nanjing 210007, China https://orcid.org/0000-0003-0101-1353
Gang Wu College of Field Engineering, Army Engineering University of PLA, Nanjing 210007, China https://orcid.org/0000-0003-3043-3336

DOI:

https://doi.org/10.1590/1679-78256910

Abstract

In this paper, LS-dyna software was used to simulate the charging process of cylindrical shell when EFP has different angles, and some interesting phenomena and laws were found. Cylindrical elastic wave σr was generated when the cylindrical shell was impacted by EFP. The cylindrical elastic wave σr was correlated with the time required for the cylindrical shell charge to be successfully detonated. When the EFP warhead penetration Angle ϑ ranges from 0° to 10°, the σr increases linearly with (cosϑ)^-1/2. With the increase of ϑ, the tangential velocity vy had an obvious effect on the impact of EFP on the cylindrical shell, and the linear relationship between the elastic wave σr and (cosϑ)^-1/2 does not change. When the ϑ was greater than 45°, EFP could not successfully impact and detonate the cylindrical shell charge. The EFP velocity was measured by velocity measurement method with an error of 1.3%. The experimental results have strong similarity with the simulation results, indicating that the parameters of the numerical simulation model have good reliability.

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Published

2022-06-09

Issue

Vol. 19 No. 4 (2022)

Section

Articles

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