Penetration behavior of reactive liner shaped charge jet impacting thick steel plates

Guo, Huan-guo; Zheng, Yuanfeng; Yu, Qian; Ge, Chao; Wang, Haifu

doi:10.1016/j.ijimpeng.2018.12.005

Cited by 87 publications

(53 citation statements)

References 27 publications

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“…In the finite-element model of integral with shell and liner circumferential MEFP warhead as shown in Figure 3, 8701 explosive [19,20] is selected, high explosive material model and JWL (Jones Wilkins Lee) state equation are used, material parameters are shown in Table 2, and JWL state equation expression is shown in Equation (1). General pressure expression of JWL equation of state [18]:…”

Section: Materials Modelmentioning

confidence: 99%

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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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Section: Materials Modelmentioning

confidence: 99%

“…MAT _NULL model is adopted for air materials. Air material parameters are shown in Table 4 [19]. The equation of state is described by linear polynomials, which is EOS_LINEAR_ POLYNOMIAL, and the element type is Euler grid.…”

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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“…Accordingly, for a given copper liner thickness, with increasing reactive liner thickness, the maximum P d of the reactive material-copper jet (RM-CJ) improves and the corresponding optimum standoff increases slightly. However, for the traditional single reactive liner shaped charge jet in the reference [24], the penetration depths of this reactive jet at the standoff of 1.0 CD, 1.5 CD, and 2.0 CD were 1.18 CD, 1.22 CD, and 0.95 CD, respectively. Thus, these experimental results indicate that, compared with the single reactive jet [24], the penetration depths of RM-CJ significantly increase.…”

Section: Experiments Of Penetrationmentioning

confidence: 99%

“…EFP with reactive materials, which can achieve enhanced behind-armor effects, was analyzed by experiments and numerical simulations [20]. 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%

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

et al. 2019

Self Cite

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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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“…Guo et al. investigated the shaped charge with reactive material liner (Al/PTFE powders) penetration into steel targets by experiments and theoretical analysis. Their results show that the shaped charge with reactive material liner can produce a larger hole diameter and a lower penetration depth than that with pure metal liner.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Penetration Performance and Optimum Design of a Bore‐Center Annular Shaped Charge

Wang

Yuan

et al. 2019

Propellants Explo Pyrotec

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To improve penetration performance of the classical conical shaped charge, a bore-center annular shaped charge (BCASC) was designed and effects of key parameters on its formation and penetration into concrete targets were investigated numerically and experimentally. As a result, suitable parameters of the BCASC, which comprehensive consideration of penetration hole diameter and depth into concrete targets, were provided. Subsequently, tests of the optimized BCASC penetration into single-layer and doublelayer concrete targets were performed. The results indicate that, for all the cases, the diameters of the rear crater are larger than that of the front ones. The influence of factors h (standoff distance) and f (the radial distance between the center of the inner and outer liner wall) on the diameters of the front crater, the penetrating tunnel, and the rear crater are greater than that of other factors. The diameters of the front crater and the penetrating tunnel decrease with the increase of factors h and f. The penetration depth of optimized BCASC into concrete exceeds 3.0 times of the charge diameter (D). Hole diameters of penetrating tunnels are larger than the charge diameter. For the single-layer concrete target, the hole diameter of the penetrating tunnel is 2.26D. And, for the double-layer concrete target, the hole diameters of the first and second layers are 1.41D and 1.33D, respectively.

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Penetration behavior of reactive liner shaped charge jet impacting thick steel plates

Cited by 87 publications

References 27 publications

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

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

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

Assessment of Penetration Performance and Optimum Design of a Bore‐Center Annular Shaped Charge

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