A new charge structure based on computer modeling and simulation analysis

Yin, Jianping; Han, Yangyang; Wang, X.F.; Chang, B. H.; Dong, F. D.; Xu, Yabei

doi:10.1016/j.jvcir.2019.102613

Cited by 7 publications

(3 citation statements)

References 14 publications

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“…Zhu [ 6 ] studied three kinds of detonation waveforms in shaped charge with wave shaper (SCWS), and obtained a method to avoid the fracture of EFP with large length-diameter ratio by optimizing the structure of wave shaper. Many scholars carried out numerical simulation researches of shaped charges [ 7 , 8 , 9 , 10 , 11 , 12 ]. By comparing with the test results, the most appropriate material parameters and state equations are adopted to obtain influence laws of various factors on the formation process of shaped charges.…”

Section: Introductionmentioning

confidence: 99%

The EFP Formation and Penetration Capability of Double-Layer Shaped Charge with Wave Shaper

et al. 2020

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Detonation waves will bypass a wave shaper and propagate in the form of a horn wave in shaped charge. Horn waves can reduce the incidence angle of a detonation wave on a liner surface and collide with each other at the charge axis to form overdriven detonation. Detection electronic components of small-caliber terminal sensitive projectile that are limited by space are often placed inside a wave shaper, which will cause the wave shaper to no longer be uniform and dense, and weaken the ability to adjust detonation waves. In this article, we design a double-layer shaped charge (DLSC) with a high-detonation-velocity explosive in the outer layer and low-detonation-velocity explosive in the inner layer. Numerical and experimental simulation are combined to compare and analyze the forming process and penetration performance of explosively formed projectile (EFP) in DLSC and ordinary shaped charge (OSC). The results show that, compared with OSC, DLSC can also adjust and optimize the shape of the detonation wave when the wave shaper performance is poor. DLSC can obtain long rod EFPs with a large length-diameter ratio, which greatly improves the penetration performance of EFP.

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Section: Introductionmentioning

confidence: 99%

The EFP Formation and Penetration Capability of Double-Layer Shaped Charge with Wave Shaper

et al. 2020

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“…The material parameters are shown in Table 3, the expression of GRUNEISEN equation of state in compression state is shown in Equation 2, and the expression in expansion state is shown in Equation (3). Expression of GRUNEISEN equation of state in compressed state [21,22]:…”

Section: Materials Modelmentioning

confidence: 99%

Study of the Forming Characteristics of Small-Caliber Ammunition with Circumferential MEFP

Liu

et al. 2020

Materials

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To study the influence of the structural parameters of the ammunition liner of small-caliber ammunition on the forming characteristics of the projectile, an integrated circumferential multiple explosively formed projectile (MEFP) warhead with an integrated shell and the liner was initially designed, and the wall thickness of the liner is variable. LS-DYNA finite-element software is used to simulate the integral circumferential MEFP of the preliminary design, based on the numerical simulation results, the influence of the thickness at the center of the liner, and the curvature radius of the liner on the shape and velocity of the formed projectile. The numerical simulation results show that when the thickness of the center of the liner is constant and the curvature radius increases gradually, the velocity of the formed projectile decreases and the length: Diameter ratio of formed projectile decreases gradually. When the curvature radius of the liner remains unchanged, the velocity of the formed projectile decreases with the increase of the thickness of the center of the liner, and the shape of the formed projectile does not change significantly. The results show that when the design of integrating the shell and the liner was adopted for the integral circumferential MEFP warhead, the shape of the formed projectile is greatly affected by the curvature radius of the liner (curvature radius of inner and outer walls of the liner), but less by the thickness of the center of the liner. The velocity of the formed projectile is affected by the curvature radius of the inner and outer walls of the liner and the thickness of the center of the liner. Moreover, the influence of the thickness of the center of the liner on the velocity of the formed projectile is greater than that of the curvature radius of the outer wall of the liner.

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“…Scholars have also studied the material selection of the jacket and the filling. Generally, the materials selected as the jacket are steel, tungsten alloy and ceramics (Fan et al, 2016, Yin et al, 2020, Ding et al, 2018b, and the materials selected as the filling are aluminum alloy, polyethylene, nylon and rubber (Zhu et al, 2007, Xu, et al, 2020. The research results show that the larger the jacket density is, the stronger the velocity storage capacity of PELE is; the larger the compression tensile strength ratio of jacket is, the larger the radial velocity of fragments is; the smaller the elastic modulus and the larger the Poisson ratio of the filling is, the smaller the radial velocity of fragments is.…”

Section: Introductionmentioning

confidence: 99%

Fragmentation Characteristics and Damage Capacity of Radial Layered PELE

Cheng

Pang

et al. 2020

Lat. Am. j. solids struct.

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PELE (the Penetrator with Enhanced Lateral Effect) produces a large number of fragments after penetrating metal target plate, which can damage the high-value targets behind the shield plate in a large area. However, when facing the multilayer spaced metal shield plates, it is difficult to penetrate them and damage the targets behind them due to the limited penetration ability of the fragments. Radial layered PELE was designed for damaging multi-layer spaced metal plates. The experiment and numerical simulation were carried out to study the deformation and fragmentation of the penetrator after penetrating 2A12 aluminum alloy or Q235 steel target plate at different velocities, as well as the damage to the witness plates after penetrating the main target plates. The results show that the fragmentation of PELE increases with the increase of impact velocity. At the same impact velocity and the same thickness of metal target plate, compared with penetrating the 2A12 aluminum alloy target plate, radial layered PELE is deformed and broken to a greater extent, resulting in heavier damage to the witness plates when penetrating the Q235 steel target plate. In the process of penetrating multi-layer metal target plates, the outer jacket of radial layered PELE is gradually broken to form a large number of flying fragments, but the inner jacket is difficult to deform and break, resulting in the strong penetration ability of the penetrator. Therefore, radial layered PELE has better penetration and damage capacity than non layered PELE.

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A new charge structure based on computer modeling and simulation analysis

Cited by 7 publications

References 14 publications

The EFP Formation and Penetration Capability of Double-Layer Shaped Charge with Wave Shaper

The EFP Formation and Penetration Capability of Double-Layer Shaped Charge with Wave Shaper

Study of the Forming Characteristics of Small-Caliber Ammunition with Circumferential MEFP

Fragmentation Characteristics and Damage Capacity of Radial Layered PELE

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