Physics hypercumulation and comdined shaped charges

Minin, V. F.; Minin, Oleg V.; Minin, Igor V.

doi:10.1109/apeie.2012.6628935

Cited by 5 publications

(6 citation statements)

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“…Penetration depth is a key factor restricting the application of shaped-charge liner in active materials. Under the premise of maintaining a sufficient penetration depth, sufficient active materials should be retained to form the aftereffect overpressure [19]. Table 5 gives penetration depths and their corresponding overpressures.…”

Section: Resultsmentioning

confidence: 99%

“…The perforation depth of the cone shaped liner is large, but the diameter of the broken hole is small, and the spherical shaped liner is opposite. The shaped-charge liners in new high-density alloys or elemental metals have a high armor penetration depth, but the aftereffect is insufficient; the PTFE energetic shaped-charge liner has a large aftereffect but is sensitive to standoff distance (1-2 times the charge diameter), and it is difficult to penetrate thick steel targets (> 1.5 times the charge diameter) [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. At present, a kind of line and charge structure is needed, which gives consideration to penetration depth and aftereffect.…”

Section: Introductionmentioning

confidence: 99%

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Design and penetration of a new W-particle/Zr-based amorphous alloy composite liner

Han

Chen

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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In this paper, in order to boost the power of shaped charge, a new type of W-particle/Zr-based amorphous alloy composite liner embedded with a restraining cylinder is designed, which is different from the original shaped charge structure. The inner restraining cylinder divides the charge into two coaxial columns: inner and outer, which changes the flow mode of the material in the liner and improves the utilization rate of explosive charge. For the first time, W-particle/Zr-based amorphous alloy (W/Zr amorphous) was used to replace the traditional copper, enhancing the penetration depth and increasing the aftereffect. Theoretical analysis and numerical simulation show that the new type of liner is feasible with great advantages. The static explosion test shows that the penetration depth of W/Zr amorphous liner is 66.35% higher than that of the copper liner, and the overpressure behind the target is 0.24 MPa. Moreover, the jet is more stable without pestle. This is a new type of composite liner with wide application prospect.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and penetration of a new W-particle/Zr-based amorphous alloy composite liner

Han

Chen

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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“…Wykazano, że efekt hiperkumulacji pozwala zwiększyć zarówno prędkość, jak i masę skumulowanych strumieni znacznie bardziej niż teoria klasyczna, opisana między innymi przez Lavrentyev i Birkhoffa. Istnieje możliwość zastosowania nowych rozwiązań do opracowania ładunków hybrydowych z efektem hiperkumulacji [10].…”

Section: Zagadnienie Hiperkumulacjiunclassified

“…Jak przedstawiono w patentach i pracach Minina [10,[13][14][15], w modelach, gdzie kąt zapadania (kolizji) przekracza 180°, układy takie charakteryzują się pojawieniem się nowej klasy strumieni: masa strug kumulacyjnych staje się większa niż masa zbitki (do niemal całkowitego zaniku zbitki). Przy zderzaniu strumienia o kącie większym niż 180°, strumień i zbitek mają tendencję do zamiany miejscami.…”

Section: Zagadnienie Hiperkumulacjiunclassified

Analiza numeryczna ładunków kumulacyjnych do inicjowania propelantów modyfikowanych

Frodyma

2016

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Analiza numeryczna ładunków kumulacyjnych do inicjowania propelantów modyfikowanych W artykule przedstawiono wyniki modelowania numerycznego procesu detonacji trzech ładunków kierunkowych, w różnych trybach pracy: hybrydowym, hybrydowym z przesłoną, hiperkumulacyjnym, przeprowadzonego w celu sprawdzenia, czy energia dostarczana przez strumień kumulacyjny może pewnie pobudzać zapłon paliwa stałego (propelantu) w układzie pracy kompleksowego urządzenia perforująco-szczelinującego. Oszacowanie energii z symulacji numerycznych porównano z energiami uzyskanymi w eksperymentach strzałowych poligonowych przeprowadzonych wcześniej na rzeczywistych układach perfogeneratora, uzyskując potwierdzenie możliwości inicjowania paliwa stałego strumieniem kumulacyjnym pochodzącym ze wszystkich trzech wersji ładunku kierunkowego. Słowa kluczowe: ładunki kierunkowe, symulacja numeryczna, inicjowanie propelantów. Numerical analysis of shaped charges for igniting modified propellants The article presents results of numerical modeling of a detonation process for three shaped charges in various operation modes: the hybrid one, the hybrid with a diaphragm and hypercumulation, performed in order to verify whether the energy delivered by a cumulative stream can surely ignite a propellant within the working arrangement of a complex perforating-fracturing device. Estimation of the energy obtained by numerical method was compared with energies obtained earlier in fire ground experiments with real perforating-fracturing device models, giving confirmation of the possibility of propellant ignition with a cumulative jet derived from all three versions of the considered shaped charges.

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“…Minin V. F. et al [15][16] designed an axisymmetric πtype liner to optimize the liner structure by means of truncating a conical liner called as primary liner, then capping the primary liner with a disc called as additional liner whose material is different from the primary liner. The numerical simulation results indicated that the velocity and effective mass of the optimized jet increased dramatically, which was defined as hypercumulation.…”

Section: Introductionmentioning

confidence: 99%

Linear Hypercumulation Formation Mechanism for π‐Type Shaped Charge

Shu

Shao

et al. 2021

Propellants Explo Pyrotec

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To investigate the formation mechanism of linear hypercumulation (LH) for plane-symmetric π-type linear shaped charges (π-LSC), the formation process of LH was studied by using classical steady jet theory and explosive dynamics. Three associated stages during LH formation were analysed theoretically, including the action of detonation wave and stress wave on primary and additional liners, and two collapse processes of the primary liner. Considering the effect of transmitted stress wave in the additional liner, we proposed a new calculation method for the peak velocity of LH. To verify the theoretical results, a plane-symmetric π-LSC along with a classical linear shaped charge (CLSC) known as V-type structure was simulated by AUTO-DYN. Results demonstrate that the variation characteristics of the pressure and velocity of LH correspond well to the above three-stage analysis. The pressure acting on the primary liner is enhanced due to the additional liner, and the truncated structure of the primary liner brings a more reasonable velocity gradient to the spiculate head of LH, evidently improving the peak velocity of LH compared with the CLSC jet by about 70 %. Finally, the penetration experimental results show that the penetration depth by the LH of π-LSC is greatly improved,73.7 % higher than that of CLSC jet.

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Physics hypercumulation and comdined shaped charges

Cited by 5 publications

References 0 publications

Design and penetration of a new W-particle/Zr-based amorphous alloy composite liner

Design and penetration of a new W-particle/Zr-based amorphous alloy composite liner

Analiza numeryczna ładunków kumulacyjnych do inicjowania propelantów modyfikowanych

Linear Hypercumulation Formation Mechanism for π‐Type Shaped Charge

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