Reaction characteristics of polymer expansive jet impact on explosive reactive armour

Yi, Juneho; Wang, Zhijun; Yin, Jianping; Zhang, Zhimin

doi:10.1515/epoly-2020-0032

Cited by 8 publications

(6 citation statements)

References 20 publications

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“…The main charge was explosive B, and the model was from the Autodyn-3D material library. The parameters are summarized in Table 4 [ 16 ].…”

Section: Resultsmentioning

confidence: 99%

“…Energetic materials are relatively insensitive under normal conditions (e.g., PTFE/Al, PTFE/Ti, and PTFE/Al/W), but undergo violent chemical reactions and release a large amount of chemical energy under high-strain-rate loading or high-pressure collision. Inert composites remain insensitive to external stressors (e.g., PTFE/Cu) [ 11 , 12 , 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

“…Although it would not detonate the reactive armor, it had insufficient penetrability. Using Cu powder as the filler for filling modification can effectively improve the material density, and dynamic mechanical properties of pure PTFE under a high strain rate, as well as the penetrability of the jet [ 11 , 12 , 13 , 14 , 15 , 16 ]. Research on the dynamic mechanical properties of materials and structures under strong dynamic loads is germane to several engineering disciplines.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on Damage Characteristics of Copper-Reinforced Polytetrafluoroethylene Shaped-Charge Warhead Liner

Wang

Yin

2022

Polymers

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Polymer materials have important applications in the4 terminal effect and damage by shaped-charge warheads. However, the low strength of pure PTFE materials reduces the penetrability of the expansive jet from these warheads, hindering its application. This study improves the strength of pure PTFE material by adding Cu powder to the shaped-charge liner. Three types of PTFE/Cu composites with different densities are prepared. The effect of increasing the density on the performance of an expansive jet is studied by a dynamic mechanical property experiment, microscopic analysis, numerical simulation, and a penetration experiment. The results show that the toughness and impact strength of the PTFE/Cu composites improve when 18–50.5% Cu is added. The strength of the composite increases linearly with the increase in Cu content. Numerical simulations and X-ray pulse experiments reveal that the addition of Cu powder enhances the cohesiveness of the head of the expansive jet. The jet head becomes more cohesive as the Cu content is increased. However, the length and diameter of the jet become smaller. The jet can create a deeper hole in the steel target and increase damage as more Cu is added to the liner.

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“…The main charge was explosive B, and the model was from the Autodyn-3D material library. The parameters are summarized in Table 4 [ 16 ].…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental Study on Damage Characteristics of Copper-Reinforced Polytetrafluoroethylene Shaped-Charge Warhead Liner

Wang

Yin

2022

Polymers

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“…The shaped jet uses the Monroe effect to generate elevated temperature and a high-speed shaped jet to damage armored targets [ 8 , 9 ]. As an anti-armor method that has been widely used for a long time, it is used in a variety of anti-armor applications, and there is a relatively well-established theoretical basis for the use of anti-armor in combat missions [ 10 , 11 , 12 , 13 ]. The existing research on jet penetration under dynamic conditions mainly focuses on the interaction between shaped-charge jets and explosive reactive armor (ERA).…”

Section: Introductionmentioning

confidence: 99%

Study on Penetration Mechanism of Shaped-Charge Jet under Dynamic Conditions

et al. 2022

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Aiming at the dynamic penetration process of a shaped-charge jet, we proposed a mathematical model for the penetration of a jet under dynamical conditions based on the theory of virtual origin and the Bernoulli equation taking into account the jet and target intensities. The dynamic penetration process of the jet was divided according to the penetration channel of the jet into the static target. The dynamic penetration model of the jet based on the unperturbed section and perturbed section was established. The penetration depth variation in the shaped-charge jet vertically penetrating target plates with different moving speeds (150~400 m/s) was analyzed by finite element software. The dynamic penetration model shows that with the increase in the target moving speed, the disturbed time of the jet continuously advances, and the dynamic penetration depth continuously decreases; as the velocity of the target increases, the penetration length of the unperturbed jet decreases and then becomes stable, while the penetration length of the perturbed jet decreases. The results showed that the mathematical model is consistent with the finite element simulation, and that the mathematical model can effectively characterize the penetration depth of the unperturbed and disturbed jet portions, adequately explain the dynamic response behavior of the jet penetrating a moving target, and effectively predict the dynamic penetration depth of the jet under the influence of the target movement.

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“…With the heating up of shaped charge technology, the protective armor is forced to develop rapidly. The reactive armor [2], electromagnetic armor [3,4], ceramic armor [5], rubber armor [6,7] and liquid armor [8] have emerged.…”

Section: Introductionmentioning

confidence: 99%

Investigation on anti-penetration capability of water filled aluminum alloy cell structure to the shaped charge jet

Zhao¹,

Zhang²

2022

Funct. Compos. Struct.

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Passive protective armor is reliable and cheap, and is favored by many armored weapons and equipment. However, reports on metal-liquid composite armor are not sufficient and systematic. Based on the shaped charge jet (SCJ), the anti-penetration capabilities of water filled aluminum alloy cell structure were studied. The hourglass cell structure (HCS) was designed according to the shock wave propagation characteristics in liquid, and the expansion-convergence cell structure (E-CCS) was derived. Based on the virtual origin theory, the residual tip velocity of jet after SCJ penetrated the cell structure was calculated. According to the theory of supersonic disturbance propagation, the Mach cone half angle of SCJ shock wave propagation in liquid was defined and corrected. The propagation and reflection behavior of shock wave were discussed to analysis the radial convergence of liquid. Via the Van Leer Arbitrary Lagrangian Euler finite element simulation model verified by experiments, the simulation studies of SCJ penetrated the circular cell structure (CCS), HCS, E-CCS and convergence/expansion multi-cell structure were performed. The results show that HCS has better effect of interfering with SCJ than that of CCS and E-CCS. An important discovery is that when the liquid composite multi-cell structure is penetrated by SCJ, the attacked cell will not affect other cells due to the shock wave has been trapped in a single cell.

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Reaction characteristics of polymer expansive jet impact on explosive reactive armour

Cited by 8 publications

References 20 publications

Experimental Study on Damage Characteristics of Copper-Reinforced Polytetrafluoroethylene Shaped-Charge Warhead Liner

Experimental Study on Damage Characteristics of Copper-Reinforced Polytetrafluoroethylene Shaped-Charge Warhead Liner

Study on Penetration Mechanism of Shaped-Charge Jet under Dynamic Conditions

Investigation on anti-penetration capability of water filled aluminum alloy cell structure to the shaped charge jet

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