Numerical and Experimental Studies of the ŁK Type Shaped Charge

Pyka, Dariusz; Kurzawa, Adam; Bocian, Mirosław; Bajkowski, Marcin; Magier, Mariusz; Śliwiński, J.; Jamroziak, Krzysztof

doi:10.3390/app10196742

Cited by 17 publications

(13 citation statements)

References 44 publications

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“…Although, multiple studies on the effectiveness of various HEAT warheads with different numbers of SCs [21,22], liner shapes [23][24][25], liner materials [26][27][28], and types of explosives used [29] were presented in the literature, paradoxically there is a lack of accurate and reliable research related to the performance of the most common PG-7VM warhead. In the available studies related to PG-7VM efficiency, the geometry of the warhead is often modeled in an inappropriate or too simplified way and the results are usually limited to the value DoP in RHA steel.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on the PG-7VM Warhead Performance against High-Hardness Armor Steel

et al. 2021

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Analyses presented in the article were carried out in order to characterize the main parameters of the shaped charge jet formed due to detonation of the PG-7VM warhead. As opposed to the previously published studies in which rolled homogeneous armored steel was mainly used as a target, in the current work the warhead penetration capability was determined against more contemporary high-hardness (500 HB) ARMSTAL 30PM steel armor with precisely determined mechanical properties. The research included experimental depth of penetration tests and their numerical reproduction in the LS-Dyna software. Special attention was paid to factors that could perturbate the shaped charge jet formation process and under- or overestimate its penetration capability. For this reason, warheads were X-ray inspected for structural discrepancies (voids or air inclusions in explosive, misalignment between the body, explosive, and liner, or lack of contact between the explosive and the liner) and properties of materials (explosive, targets, and most important warhead components) were analyzed before the experiments. The numerical model of the warhead was defined more accurately than in previously published studies, since it was based on the real grenade dimensions and its technical documentation. Thanks to this, the depth of penetration of the target made of ARMSTAL 30PM armored steel plates by the shaped charge jet formed from the PG-7VM warhead obtained by numerical simulation was consistent with the experimental results and equaled 278 mm and 280 mm, respectively. The difference between the experimental and numerical value was smaller than 1%, which confirms that the developed methodology of modeling allows users to properly reproduce the PG-7VM shaped charge jet formation and target penetration processes. A verified numerical model of the shaped charge jet penetration into a steel target was used to determine depth of penetration in function of stand-off distance for the PG-7VM warhead. A maximum depth of penetration of about 317 mm was obtained for the stand-off distance of 360 mm, which may indicate the potential direction of modernization of warheads.

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Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on the PG-7VM Warhead Performance against High-Hardness Armor Steel

et al. 2021

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“…The shape and material nature of Cu foil, which affects the energy deposition, plasma output ability and flyer velocity, is the most researched topic on exploding foil detonators [1][2][3], which are considered as the key materials for electronic safe and arm systems for rocket motor ignition, fuzing, ammunition, and flight termination applications [4][5][6][7][8][9][10][11][12]. The velocity and shape of the flyer are two key factors that affect the energy-output effect of exploding foil initiators.…”

Section: Introductionmentioning

confidence: 99%

Effect of Grain Size and Micromorphology of Cu Foil on the Velocity of Flyer of Exploding Foil Detonator

Han

Deng

Chu³

et al. 2021

Applied Sciences

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In this paper, the effect of grain size and micromorphology of Cu foil on the velocity of the flyer of an exploding foil detonator was studied. A Cu foil with different grain sizes and micromorphologies was prepared by the physical vapor deposition sputtering method. The flyer velocity of the Cu foil was measured by the photon Doppler technique (PDT). The influence of the grain size and micromorphology of the Cu foil (which was the core transducer of the exploding foil detonator) on the flyer velocity and reacted morphology was discussed. The results show that the grain size and micromorphology of the Cu film can greatly affect the velocity and morphology of the flyer. The grain size of the Cu film is more uniform, and the stimulus response in the middle area of the bridge foil is more concentrated. In addition, the current density becomes more uniform, resulting in a better explosion performance. Consequently, the speed of the formed flyer becomes higher, leading to a smoother flyer surface, which is more conductive to energy conversion.

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“…By controlling the direction of the electromagnetic field, the penetration ability of the SCJ can be improved or reduced. Pyka et al [ 12 ], through theoretical research and numerical tests on two types of the Polish ŁK cumulative charge, showed that the jet still retains its ability to penetrate after penetrating the shield. It follows that this ŁK charge can effectively pierce shields of this type with a thickness of more than three calibers.…”

Section: Introductionmentioning

confidence: 99%

Study on Penetration Performance of Rear Shaped Charge Warhead

Liu

et al. 2021

Materials

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In guided munitions, the shaped charge jet (SCJ) warhead is located behind the simulation compartment (including the control cabin, the steering gear cabin, and the guidance cabin). Therefore, the order of penetration of the SCJ is the simulation cabin and the target. To study the penetration performance of the SCJ to the target plate, the numerical simulation method is used to study the penetration performance of the designed warhead for the steel target at different standoffs, and the depth of penetration (DOP) at the best standoff is obtained, that is, the DOP of the steel target is about 128 mm. Additionally, the penetration performance of the SCJ warhead to target is studied by numerical simulation and experimental verification. Numerical simulation and experimental results show that the DOP of the SCJ warhead to the steel target is 50 mm without the simulation cabin, and about 30 mm with the simulation cabin. The results show that the penetration performance of SCJ is greatly weakened under the condition of non-optimal standoff, but the rear shaped charge warhead still has a strong penetration performance after completing the penetration of the simulated cabin.

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Numerical and Experimental Studies of the ŁK Type Shaped Charge

Cited by 17 publications

References 44 publications

Experimental and Numerical Study on the PG-7VM Warhead Performance against High-Hardness Armor Steel

Experimental and Numerical Study on the PG-7VM Warhead Performance against High-Hardness Armor Steel

Effect of Grain Size and Micromorphology of Cu Foil on the Velocity of Flyer of Exploding Foil Detonator

Study on Penetration Performance of Rear Shaped Charge Warhead

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