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

Ma, Guojia; He, Guanglin; Liu, Yukuan; Guo, Yachao

doi:10.3390/ma13040891

Cited by 7 publications

(4 citation statements)

References 8 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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“…e material model of the shell, explosive, and air is the same as that in Section 3.2 of [20], and the material parameters of the liner are shown in Table 2.…”

Section: Materials Modelmentioning

confidence: 99%

Numerical Simulation of Multiple Explosively Formed Projectile Warhead Forming Characteristics considering Various Materials

Liu

et al. 2021

Shock and Vibration

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To study the influence of different liner structures and materials (copper, steel, and tungsten) on the forming characteristics of multiple explosively formed projectile (MEFP) with integrated liner and shell designs, three types of liners with different structures were designed. LS-DYNA was used for numerical simulation, and the results show that the thickness change at the center of the liner has no obvious influence on the shape of the explosively formed projectile (EFP). However, the curvature radius of the liner has a significant influence on the shape of the EFP. When the liner material is copper and the curvature radius of the liner is greater than 8 mm, the EFP shape approximates an ellipsoidal or hemispherical shape and the EFP forming speed is between 1900 m/s and 2400 m/s. When the material of the liner is steel or tungsten and the curvature radius of the liner is thicker than 8 mm, the liner is not able to form projectiles in the shape of a sphere, ellipsoid, or long rod. By comparing the forming speed from 1#EFP to 4#EFP, it can be said that MEFP with integrated liner and shell design displays a certain pressurization effect. Research results show that, for small-caliber MEFP warheads, subject to the size of the warhead, when the liner is steel or tungsten, the detonation energy generated by the limited charge does not result in the liner forming an effective EFP. However, when the liner material is selected as copper, the EFP forming shape and speed are more appropriate.

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“…When the velocity is 50–1000 m/s in the collision process, the material is mainly plastic and viscous deformation [ 22 ]. During the deformation process of the honeycomb structure, the honeycomb cells at the edge of the impact area deform in the radial direction under tension, and finally break, which is a typical tensile tear type failure.…”

Section: Structural Design and Materials Modelmentioning

confidence: 99%

Micro Fracture Behavior of Composite Honeycomb Sandwich Structure

Yin

Wang

et al. 2020

Materials

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To study the influence of structure size and composite forms on the mechanical properties of the composite double honeycomb sandwich structure, a composite double honeycomb sandwich structure was initially designed. The dynamic response of a composite double-layer honeycomb sandwich structure under high-speed impact was studied through theoretical analysis and numerical simulation. Ls-dyna software was used to simulate the initially designed composite structure. According to the numerical simulation results and the proposed method for calculating the fracture energy of the composite double honeycomb sandwich structure, the effects of different composite forms on the mechanical properties were analyzed. The results show that the proposed fracture energy calculation method can effectively describe the variation trend of the honeycomb structure and the micro-element fracture situation in the valid time. The fracture energy curve has a high sensitivity to cell density and material, and the strength of the top core has a great influence on the overall energy absorption. Compared with the traditional honeycomb protection structure, the energy absorption of the initially designed composite honeycomb sandwich structure was improved effectively.

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

Cited by 7 publications

References 8 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

Numerical Simulation of Multiple Explosively Formed Projectile Warhead Forming Characteristics considering Various Materials

Micro Fracture Behavior of Composite Honeycomb Sandwich Structure

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