Blast performance of layered charges enveloped by aluminum powder/rubber composites in confined spaces

Li, Junbao; Li, Weibing; Yu, Jiaxin; Xiao, Wensheng; Xu, Heyang

doi:10.1016/j.dt.2021.03.014

Cited by 8 publications

(3 citation statements)

References 21 publications

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“…After that, the rubber was evenly kneaded at the minimum roller distance and thinned by passing it through the roller 4–5 times. Finally, the refined rubber was vulcanized and molded by a 200 T vulcanizer [ 4 ]. The density, ρ shell , and flow stress, σ 0.2 , as well as the Hugoniot parameter, c 0 and λ , of the composite are provided in Table 2 .…”

Section: Experimental Verificationmentioning

confidence: 99%

“…Recently, many studies have applied non-metallic and particle-filled non-metallic materials to blasting warhead projectiles to improve the damage efficiency of the warhead or enhance the designability of ammunition power [ 1 , 2 , 3 , 4 ]. For example, ammunition for low collateral damage is often fabricated using polymer matrix composites and a certain amount of explosives, then filled with heavy metal powders to produce different killing mechanisms [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

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Prediction of Peak Overpressure of Charge Enveloped by Polymer Matrix Composite: Theoretical Modeling and Experimental Verification

Wang

et al. 2022

Polymers

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This study aimed at elucidating some characteristics of the shock wave overpressure generated by a non-traditional layered charge comprising an inner high-energy explosive and an outer polymer matrix composite. Two models for predicting the peak overpressure (Δpm) of the charge were established, namely, a model based on the initial parameters of the blast wave, and a model considering the weakening of the explosion energy through the introduction of polymer matrix cladding. The overpressure of a typical layered charge was experimentally measured for model validation. It was found that the difference between the Δpm predicted by the two models and the experimental data is less than 15.12% and 14.17%, respectively. The model that was established based on the conservation of energy law, is in best agreement with the experimental data under different cladding/charge mass ratios (αm). The model that was based on the initial parameters of the blast wave obtained a low predicted value when αm was 0.4–0.8, which is attributed to the non-uniformity of the gas-solid mixture during the explosive dispersion stage.

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Section: Experimental Verificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Prediction of Peak Overpressure of Charge Enveloped by Polymer Matrix Composite: Theoretical Modeling and Experimental Verification

Wang

et al. 2022

Polymers

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“…The multi-layer annular nested composite charge has attracted more attention in recent years as a structure for controlling damage [1][2][3][4]. This structure generally consists of an explosive layer with varying detonation velocity or detonation heat and a non-detonating layer that weakens or enhances detonation energy.…”

Section: Introductionmentioning

confidence: 99%

Influence of combination of coaxial cylindrical explosives on fragmentation and shock waves of a shelled composite charge

Xiao-ming

et al. 2023

Propellants Explo Pyrotec

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This paper investigates fragmentation and shock waves generated by a novel coaxial cylindrical composite charge composed of an inner explosive, an intermediate inert material and an outer explosive widely used in tunable ammunition. Charges containing two types of explosive combinations were designed, and explosion experiments were conducted in two initiation modes: detonating only an inner explosive and detonating inner and outer explosives simultaneously. Results suggest the composite charge with higher inner-detonation velocity and lower outer-detonation velocity achieves more differentiated power output under different initiations. The differences in the average fragment mass and peak overpressure are as high as 34.5 % and 39.9 %, respectively, which are larger than 4.4 % and 8.4 % under the contrary explosive combination. On the basis of this observation, corresponding 2-D and 3-D models were simulated using AUTODYN code to investigate the evolution of the detonation waveform and detonation energy release. The numerically simulated initial shell expansion and later shock wave propagation of the composite charge agreed well with the experimental data. The errors in expansion radius and shock wave parameters (peak overpressure and specific impulse) are less than 6.6 % and 16.9 %, respectively, between the simulations and experiments. It was found that the particle velocity profile in the charge with lower outer-detonation velocity lagged behind that of the charge with higher inner-detonation velocity under inner initiation, while a wave front collision zone close to the outer charge appeared in the non-detonation layer under simultaneous initiation.

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Al/Hf ratio-dependent mechanisms of microstructure and mechanical property of nearly fully dense Al–Hf reactive material

Li,

Wang

2024

Defence Technology

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Blast performance of layered charges enveloped by aluminum powder/rubber composites in confined spaces

Cited by 8 publications

References 21 publications

Prediction of Peak Overpressure of Charge Enveloped by Polymer Matrix Composite: Theoretical Modeling and Experimental Verification

Prediction of Peak Overpressure of Charge Enveloped by Polymer Matrix Composite: Theoretical Modeling and Experimental Verification

Influence of combination of coaxial cylindrical explosives on fragmentation and shock waves of a shelled composite charge

Al/Hf ratio-dependent mechanisms of microstructure and mechanical property of nearly fully dense Al–Hf reactive material

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