Damage of Two Concrete Materials due to Enhanced Shaped Charges

Resnyansky, A. D.; Weckert, S. A.

doi:10.1007/978-3-319-06995-1_39

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…Huerta et al [14] designed a 0.7 m diameter liner and conducted field tests on the penetration of tuff with shaped charges. Resnyansky and Weckert [15] conducted tests of shaped charges penetrating/perforating concrete target slabs, in which the shaped charges were divided into three structures with no, simple, or complex waveform adjusters, and the targets were divided into normal strength concrete (NSC, 40 MPa) and ultra-highperformance concrete (UHPC, 200 MPa). The results show that an effective waveform adjuster can significantly improve the performance of the shaped-charge jet; without a waveform adjuster, the depths of shaped charges penetrating into the two targets were 177 and 138 cm, respectively, with a reduction in depth of about 22%, which indicates that high-performance concrete has better performance compared with ordinary concrete.…”

Section: Introductionmentioning

confidence: 99%

Similarity Law Study of Shaped Charges Penetrating a Concrete Target

Zhang¹,

Zhang

Zhao

et al. 2022

Buildings

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In order to study the similarity law of penetration of concrete targets by shaped charges, penetration tests of concrete targets with different sizes of shaped-charge jets were carried out, and the prototype and the model projectiles met the similarity law with a simulation ratio of 1:1.5. LS-DYNA finite element software was used to simulate the tests, and the accuracy of the ALE algorithm, fluid–solid coupling algorithm, material model, equation of state, and corresponding material parameters was verified. Numerical simulations were further conducted for the different types of shaped-charge jets (jets, rod jets, and explosively formed projectiles) formed by different liner angles penetrating into the concrete target, and the results show that the shaped-charge jets basically meet the similarity law when penetrating concrete targets.

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Section: Introductionmentioning

confidence: 99%

Similarity Law Study of Shaped Charges Penetrating a Concrete Target

Zhang¹,

Zhang

Zhao

et al. 2022

Buildings

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“…High-speed framing camera recording provided one of the first insights into the mechanism of jet formation [20]. Interrupt gauge screens are being widely used for both projectiles and jets [21,22]. Electromagnetic coils have been tested as an alternative to the electrical screens in the jet velocity measurements [23].…”

Section: Introductionmentioning

confidence: 99%

Simple flash screens for shaped charge jet and flyer velocity measurements

Künzel¹,

Kučera²,

Kvapil³

et al. 2020

Meas. Sci. Technol.

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The paper describes a novel technique for measuring the velocity of fast flying objects. The technique utilises a series of simple single-use screens which are placed along the expected flight path. The projectile interaction with the screen generates a flash of light which is captured by an optical fibre connected to the light detecting device. The velocities are calculated from the signal arrival times and screen positions. The flash screens were tested using copper shaped charge jets and flyer discs accelerated by explosive charges made of sensitised nitromethane. In addition to the simple time of arrival measurement with VOD-815, the light signals were recorded using an OPTIMEX-64 light analyser which enabled checking their intensity and reproducibility. Some of the experiments were also carried out using a UHSi 12/24 high-speed camera. The flyer plate velocities measured were compared with empirical calculations from a Gurney model.

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“…Wang et al presented a calculation formula by modifying the hole enlargement pressure of Szendrei model [8]. In recent years, both numerical and experimental techniques have been utilized extensively to investigate concrete penetration [9][10][11]. Pincosy et al studied the multiple shaped charge penetrating into concrete targets by numerical simulations and experiments [12].…”

Section: Introductionmentioning

confidence: 99%