Numerical Simulation of Modified Low-Density Jet Penetrating Shell Charge

Chang, B. H.; Yin, Jianping; Cui, Z. Q.

doi:10.2507/ijsimm14(3)5.295

Cited by 22 publications

(24 citation statements)

References 6 publications

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“…In general, PTFE-based reactive materials are formed by mixing active metal powders within the fluoropolymer binder and then are consolidated via a pressing/sintering process, such as PTFE/Al [1,2], PTFE/Ti [3], and PTFE/Cu [4]. These reactive materials are a class of energetic materials that are formulated to release their chemical energy under intense dynamic loadings or high pressures and high strain rates [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…Further studies on reactive liner shaped charges indicated that the reactive material mass entering the penetration hole and the initiation location of the reactive jet significantly influenced the overpressure inside the targets or the damage mechanism of concrete and steel targets [22,23,24]. In addition to PTFE/Al reactive materials, the jet formation and penetration behaviors of PTFE and PTFE/Cu reactive liner shaped charges have also been researched by experiments and simulations [4,25,26].…”

Section: Introductionmentioning

confidence: 99%

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Application of PTFE/Al Reactive Materials for Double-Layered Liner Shaped Charge

et al. 2019

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The penetration enhancement behaviors of a reactive material double-layered liner (RM-DLL) shaped charge against thick steel targets are investigated. The RM-DLL comprises an inner copper liner, coupled with an outer PTFE (polytetrafluoroethylene)/Al reactive material liner, fabricated via a cold pressing/sintering process. This RM-DLL shaped charge presents a novel defeat mechanism that incorporates the penetration capability of a precursor copper jet and the chemical energy release of a follow-thru reactive material penetrator. Experimental results showed that, compared with the single reactive liner shaped charge jet, a deeper penetration depth was produced by the reactive material-copper jet, whereas the penetration performance and reactive material mass entering the penetrated target strongly depended on the reactive liner thickness and standoff. To further illustrate the penetration enhancement mechanism, numerical simulations based on AUTODYN-2D code were conducted. Numerical results indicated that, with increasing reactive liner thickness, the initiation delay time of the reactive materials increased significantly, which caused the penetration depth and the follow-thru reactive material mass to increase for a given standoff. This new RM-DLL shaped charge configuration provides an extremely efficient method to enhance the penetration damage to various potential targets, such as armored fighting vehicles, naval vessels, and concrete targets.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of PTFE/Al Reactive Materials for Double-Layered Liner Shaped Charge

et al. 2019

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“…Reactive material liner is a kind of integrated solid energetic liner prepared by filling metal powders in a high polymer binder, typically such as polytetrafluoroethylene (PTFE)/Al and PTFE/Cu, and then fabricating by a cold pressing and sintering process [1,2]. Generally, the reactive material liner under the shaped charge effects can form a reactive jet with high velocity to penetrate the target and then release its violent chemical energy inside the penetration crater, resulting in extremely large amounts of damage to concrete or geologic material targets [3].…”

Section: Introductionmentioning

confidence: 99%

“…The penetration behaviors of PTFE/Al reactive jets against thick steel plates under different standoffs were studied, and the experiments showed that the fragmentation effects of penetrated steel plates were produced at the standoff of 0.5, 1.0, and 1.5 CD (charge diameter), whereas the penetration depths were only approximately 1.0 CD [9,10]. Yin et al and Wang et al compared and analyzed the penetration performance of a PTFE jet and PTFE/Cu jet impacting shell charge and main armor by simulations and experiments combined, and the results verified that the penetration capability of the PTFE/Cu jet increased to some extent [2,11]. In addition to PTFE-based reactive material liners, metal powders reactive liners have been widely studied in recent years.…”

Section: Introductionmentioning

confidence: 99%

Penetration Behavior of High-Density Reactive Material Liner Shaped Charge

et al. 2019

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The traditional polytetrafluoroethylene (PTFE)/Al reactive material liner shaped charge generally produces insufficient penetration depth, although it enlarges the penetration hole diameter by chemical energy release inside the penetration crater. As such, a novel high-density reactive material liner based on the PTFE matrix was fabricated, and the corresponding penetration performance was investigated. Firstly, the PTFE/W/Cu/Pb high-density reactive material liner was fabricated via a cold pressing/sintering process. Then, jet formation and penetration behaviors at different standoffs were studied by pulse X-ray and static experiments, respectively. The X-ray results showed that the PTFE/W/Cu/Pb high-density reactive material liner forms an excellent reactive jet penetrator, and the static experimental results demonstrated that the penetration depth of this high-density reactive jet increased firstly and then decreased by increasing the standoff. When the standoff was 1.5 CD (charge diameter), the penetration depth of this reactive jet reached 2.82 CD, which was significantly higher than that of the traditional PTFE/Al reactive jet. Moreover, compared with the conventional metal copper jet penetrating steel plates, the entrance hole diameter caused by this high-density reactive jet improved 29.2% at the same standoff. Lastly, the chemical reaction characteristics of PTFE/W/Cu/Pb reactive materials were analyzed, and a semi-empirical penetration model of the high-density reactive jet was established based on the quasi-steady ideal incompressible fluid dynamics theory.

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“…Chang, B.H. et al [12] enhanced the penetration depth for low density jet by 5.38 % adding a certain fraction of copper powder in the matrix.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Shaped Charge Penetration Capability and Disturbation of the Jet by Explosive Reactive Armor

Kemmoukhe¹,

Burzić

Savić

et al. 2019

Teh. vjesn.

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This paper presents a numerical study of the effect of main parameters (liner material, explosive charge, stand-off distance and the presence of the wave-shaper), on one hand, on the jet formation, jet velocity and the jet length, and on the other hand, on the penetration depth. We propose a numerical approach to evaluate their effects on the performance of the shaped charge. AUTODYN-2D software is used for numerical simulations of the shaped charge. The multi material Euler solver of the AUTODYN is used for the jet formation investigation, whereas, Lagrange solver is used for the resolution of the penetration problem. Results have shown that the presence of waveshaper increases the shaped charge depth penetration. For the standoff of 6 charge calibres, the jet penetration is found to be deepest. It is found that the jet velocity is proportional to the jet energy, and the penetration is proportional to the liner density. The oblique explosive reactive armor is more efficient for the protection of the main target. Numerical results have a good agreement with the data from available literature-with experimental results for the chosen explosives.

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Numerical Simulation of Modified Low-Density Jet Penetrating Shell Charge

Cited by 22 publications

References 6 publications

Application of PTFE/Al Reactive Materials for Double-Layered Liner Shaped Charge

Application of PTFE/Al Reactive Materials for Double-Layered Liner Shaped Charge

Penetration Behavior of High-Density Reactive Material Liner Shaped Charge

Improvement of Shaped Charge Penetration Capability and Disturbation of the Jet by Explosive Reactive Armor

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