Shock response and prediction model of equation of state for aluminum powder/rubber matrix composites

Li, Junbao; Li, Weibing; Wang, Xiaoming; Li, Wenbin

doi:10.1016/j.matdes.2020.108632

Cited by 6 publications

(4 citation statements)

References 25 publications

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“…The p-u relationship of the reflected wave of the detonation products can be calculated from Equations (21) and (23). Figure 6 shows the calculated p-u curve of the detonation products of the JH-2 explosive, and three formulations of the lithium fluoride-filled rubber [ 9 ]. The explosive’s C-J point can be considered as the dividing point; the upper part indicates that the reflected wave is a shock wave, while the lower part indicates that the reflected wave is a rarefaction wave.…”

Section: Prediction Of Peak Overpressure Based On the Conservation Of...mentioning

confidence: 99%

“…detonation products of the JH-2 explosive, and three formulations of th filled rubber [9]. The explosive's C-J point can be considered as the upper part indicates that the reflected wave is a shock wave, while the l that the reflected wave is a rarefaction wave.…”

Section: Energy Of the Claddingmentioning

confidence: 99%

“…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 ]. The use of non-metallic materials, such as rubber and plastic matrix shells, is also considered based on certain performance requirements, including corrosion resistance and fatigue resistance [ 7 , 8 , 9 ]. A layered charge comprising an inner high-energy explosive and outer non-detonating material has gradually attracted research attention, owing to its different explosive energy output characteristics compared with a single charge.…”

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: Prediction Of Peak Overpressure Based On the Conservation Of...mentioning

confidence: 99%

Section: Energy Of the Claddingmentioning

confidence: 99%

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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“…However, reactive materials [8][9] may participate in the reaction, offsetting the energy loss by occupying the charge space. Li et al [10] investigated the shock wave overpressure generated by a multi-layer composite charge for different contrast distances and azimuthal angles. They combined dimensional analysis and the explosion mechanism to establish a predictive model for peak overpressure under inner initiation and simultaneous initiation.…”

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

et al. 2022

Defence Technology

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Shock response and prediction model of equation of state for aluminum powder/rubber matrix composites

Cited by 6 publications

References 25 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

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

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