Effects of the aluminum content on the shock wave pressure and the acceleration ability of RDX-based aluminized explosives

Zhou, Zhiqiang; Nie, Jianxin; Ou, Zhuo-Cheng; Qin, Jianhua; Jiao, Qingze

doi:10.1063/1.4897658

Cited by 25 publications

(9 citation statements)

References 34 publications

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“…The shock wave pressure P on the lower surface of the 1# plexiglas partition is measured using manganin pressure sensor, and the pressure on the upper surface of the 1# plexiglas partition is equal to the detonation pressure P DP of the test sample, so the detonation pressure P DP can be obtained according to attenuation law of shock wave pressure in plexiglass partition. The attenuation of the shock wave pressure versus distance is fit with a power-law function, as described in Equation (2) [24,25]. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55…”

Section: Experimental Principles and Methodsmentioning

confidence: 99%

Effects of Aluminum Particle Size on the Detonation Pressure of TNT/Al

Zhou

Chen

Yuan

et al. 2017

Propellants Explo Pyrotec

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To better understand the influence of the aluminum particle size on the detonation pressure of TNT/Al, electrical conductivity experiment and detonation pressure experiment were performed in this study. Four types of TNT/Al were considered, in which the particle size of aluminum was 50 nm, 100 nm, 1.50 μm, and 9.79 μm, respectively. The combustion process of Al in TNT/Al was detected by electrical conductivity experiment, and the detonation pressures of TNT/Al were measured by using the manganin pressure sensors. According to the experimental results, the Chapman Jouguet (CJ) pressure of the explosive containing nano‐sized aluminum is higher than the explosive containing micron‐sized aluminum powder because of the combustion of nano‐sized aluminum in the detonation reaction zone. In addition, a smaller aluminum particle size in TNT/Al is associated with a slower detonation pressure attenuation. This study gives a clearer picture of how aluminum particle size contributes to detonation pressure on timescales from 0 to 0.82 μs.

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Section: Experimental Principles and Methodsmentioning

confidence: 99%

Effects of Aluminum Particle Size on the Detonation Pressure of TNT/Al

Zhou

Chen

Yuan

et al. 2017

Propellants Explo Pyrotec

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“…Explosive charges were buried in concrete targets. The radius of the blasthole is 0.02 m. The concrete mixture used consists of cement, sand, crushed basalt and other components, as specified in Zhou et al [14]. The physical properties of the concrete are listed in Table 2.…”

Section: Aluminized Explosive Experiments In Concretementioning

confidence: 99%

“…In the concrete, Pei et al [13] performed explosion experiments with 70 g RDX-based aluminized explosive, the experimental results show that the damage area of RDX/Al/wax (80 %/15 %/5 %) is 10 % larger than pure RDX. Zhou et al [14] measured the shock wave pressures in the affected concrete bodies by using manganin pressure sensor, the results indicated that the pressure impulse of RDX/Al/wax (80 %/15 %/5 %) is 42 % higher than pure RDX. Aluminized explosives perform well in the concrete, but the role of aluminum reaction in the performance of RDX-based aluminized explosives in concrete has rarely been investigated.…”

Section: Introductionmentioning

confidence: 99%

The Role of Al Reaction Rate in the Damage Effect and Energy Output of RDX‐Based Aluminized Explosives in Concrete

Zhou

Chen

Yuan

et al. 2019

Propellants Explo Pyrotec

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This paper aims to improve the understanding of how the aluminum reaction rate affects the damage effect and energy output of RDX‐based aluminized explosives in concrete. A calculation method for the dynamic response of concrete and energy output of RDX‐based aluminized explosive is proposed based on the time‐dependent Jones‐Wilkins‐Lee equation of state (JWL‐EOS), cavity expansion model and energy partition theory, which is in turn verified through experiments with 70 g RDX/Al/wax (65 %/30 %/5 %) charge embedded in concrete. Based on the proposed method, the dynamic response of concrete and energy output of RDX/Al/wax with four different aluminum reaction rates were calculated. The results indicate a positive correlation between the crushed region radius and the aluminum reaction rate, and that the cracked region radius is inversely proportional to the aluminum reaction rate. For the energy output of RDX/Al/wax, the shock wave energy grows with increasing aluminum reaction rate, while the detonation products expansion energy increases and then drops with rising aluminum reaction rate, peaking at 2.37 MJ/kg when the Al reaction rate constant M=0.02. The calculation method presented in this paper are of great significance for investigating and improving the performance of RDX‐based aluminized explosives in concrete.

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“…It is assumed that none of the aluminum particles reacted during the detonation, and the Al oxidation occurs in the products behind the detonation front. 15,16 For detonation of aluminized explosives, the duration for energy release of the reaction of explosive components is generally less than 0.1 ms, while the energy release for Al oxidation is in the order of microseconds to several milliseconds. 17 Therefore, the reaction rate of explosive components is much quicker than the rate of Al oxidation.…”

Section: The Reaction Mechanism Of Aluminized Explosivementioning

confidence: 99%

A quasi-analytical model of aluminized explosive products under strong constraint

Jian-nan

Wan

et al. 2017

Advances in Mechanical Engineering

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In this article, a simple model of aluminized explosive products under strong constraint is established. The analytical model incorporates the minimum details necessary to capture the contribution of the Al oxidation in the detonation products. In order to solve the flow field of aluminized explosive products analytically, some assumptions are necessary. It is assumed that Al particles are inert during the detonation reaction and do not affect the flow before oxidation of Al particles. To solve the flow field behind the detonation front analytically, the expansion process of detonation products is divided into several time ranges. In each short time range, it is assumed that the process is approximately isentropic. The metal plate test was conducted, and the motion of the metal plate was obtained. The comparison of calculation and test results was conducted. The quasi-analytic model can describe the contribution of Al reaction in the detonation products correctly, and the calculation results are in good agreement with test results. KeywordsQuasi-analytic model, aluminized explosive products, local isentropic process, local sound speed, reaction degree of aluminum powder Date

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Effects of the aluminum content on the shock wave pressure and the acceleration ability of RDX-based aluminized explosives

Cited by 25 publications

References 34 publications

Effects of Aluminum Particle Size on the Detonation Pressure of TNT/Al

Effects of Aluminum Particle Size on the Detonation Pressure of TNT/Al

The Role of Al Reaction Rate in the Damage Effect and Energy Output of RDX‐Based Aluminized Explosives in Concrete

A quasi-analytical model of aluminized explosive products under strong constraint

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