Effects of HMX Particle Size on the Shock Initiation of PBXC03 Explosive

Luo, Wen; Duan, Zhuo-Ping; Zhang, Liansheng; Zhang, Zhenyu; Ou, Zhuo-Cheng; Huang, Fenglei

doi:10.1515/ijnsns-2011-0129

Cited by 8 publications

(11 citation statements)

References 5 publications

(8 reference statements)

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“…Up to now, the DZK model is generally accepted due to the advantage that, compared with the most commonly used Ignition and Growth model developed by Lee and Tarver , fewer parameters in the DZK model need to be determined. However, further studies show that the typical pressure increasing rate calculated using the DZK model is usually faster than the experimental data . Moreover, this model fails to estimate the influence of the explosive density (or porosity) on the shock initiation characteristics, which is just the motivation of modifying the DZK model in this study.…”

Section: Introductionmentioning

confidence: 84%

“…, in which a low‐pressure slow reaction and high‐pressure fast reaction terms are introduced to describe the detonation growth process. The DZK model is used to describe the influence of the initial temperature, the shock loading and the mesostructure characteristics (e. g., the particle size, porosity, binder's content and strength) on the ignition and the detonation growth processes of PBXs . Up to now, the DZK model is generally accepted due to the advantage that, compared with the most commonly used Ignition and Growth model developed by Lee and Tarver , fewer parameters in the DZK model need to be determined.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Embedded Manganin Gauge Measurements and Modeling of Shock Initiation in HMX‐Based PBX Explosives with Different Particle Sizes and Porosities

Bai

Duan

Luo

et al. 2020

Propellants Explo Pyrotec

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A series of shock initiation experiments on the explosive PBXC03 (87 % HMX, 7 % TATB, and 6 % Viton by weight) with different particle sizes and porosities under various shock loadings have been performed, and it is found that the particle size and the porosity of the explosives have much influence on the shock initiation characteristics. That is, the smaller the particle size, the more difficult the explosive to be ignited but the faster the detonation grows once the explosive is ignited. It is also found that the detonation grows the fastest in the explosive with moderate porosity. Moreover, a modified mesoscopic reaction rate model based on the experimental results and the pore collapse hot-spot ignition mechanism is developed, which allows for a separate reaction mechanism evaluation at different reaction stages for the shock initiation and detonation growth processes in the explosives. The calculated pressure-time histories and Pop-Plots for PBXC03 are founded to be all in good agreement with the experimental data. The modified mesoscopic reaction rate model shows its potentiality for quantitatively predicting the effects of the mesostructure of PBXs on the shock initiation and detonation growth processes with a high degree of confidence.Keywords: Shock initiation · Lagrangian experimental system · Modified mesoscopic reaction rate model · Particle size · Porosity · PBX explosive Embedded Manganin Gauge Measurements and Modeling of Shock Initiation in HMX-Based PBX Explosives Propellants Explos. Pyrotech. 2020, 45, 908-920 www.pep.wiley-vch.de

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Section: Introductionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Embedded Manganin Gauge Measurements and Modeling of Shock Initiation in HMX‐Based PBX Explosives with Different Particle Sizes and Porosities

Bai

Duan

Luo

et al. 2020

Propellants Explo Pyrotec

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“…Additional validation work is in progress. The mesoscale simulations model thermomechanical wall shocks in an inert medium containing voids, and have application in the prediction of 'hot spots' which may lead to explosive ignition [6]. The macroscale simulations model first thermomechanical and second reacting themomechanical wall shocks, and have application in the prediction of shock induced detonation in energetic materials [7].…”

Section: Example Simulationsmentioning

confidence: 99%

Nonholonomic Hamiltonian method for meso-macroscale simulations of reacting shocks

Lee¹,

Fahrenthold²

2017

AIP Conference Proceedings

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Abstract. The seamless integration of macroscale, mesoscale, and molecular scale models of reacting shock physics has been hindered by dramatic differences in the model formulation techniques normally used at different scales. In recent research the authors have developed the first unified discrete Hamiltonian approach to multiscale simulation of reacting shock physics. Unlike previous work, the formulation employs reacting themomechanical Hamiltonian formulations at all scales, including the continuum. Unlike previous work, the formulation employs a nonholonomic modeling approach. Example applications of the method include mesoscale simulations of hot spot formation and macroscale simulations of shock to detonation.

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“…TATB (1,3,5-triamino-2,4,6-trinitrobenzene) belongs to the high thermal stabilized and insensitive high explosives, but it exhibits lower released energy [4][5][6]. Therefore, to satisfy the requirements of high performance and low sensitivity, mixing HMX and TATB at a certain ratio to prepare a HMX/TATB-based polymer bonded explosive (PBX), such as the commonly used PBXC03 (87 % HMX, 7 % TATB, and 6 % Viton by weight) [7,8] and the insensitive PBXC10 (25 % HMX, 70 % TATB, and 5 % Kel-F800 by weight) [7,9], is an effective method to balance the contradiction between energy release and sensitivity [10,11] and a direction for the formulation design of multi-component explosives. Moreover, it is well known that the detonation growth behaviors and the energy release characteristics of the HMX component is very much different from that of the TATB component, depending on each of their own reaction mechanism.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Detonation Growth Characteristics between HMX‐ and TATB‐based PBXs

Bai

Duan

Luo

et al. 2019

Propellants Explo Pyrotec

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This paper offers a new method for calculating the reaction rate based on the pore collapse “hot‐spot” ignition mechanism in multi‐component polymer bonded explosives (PBXs), and proposes a mesoscopic reaction rate model that allows us to predict the shock initiation and detonation behaviors of multi‐component PBXs with any explosive component proportion and explosive particle size. The pressure‐time histories in PBXC03 (87 % HMX, 7 % TATB, and 6 % Viton by weight) and PBXC10 (25 % HMX, 70 % TATB, and 5 % Kel‐F800 by weight) are calculated by using the new mesoscopic reaction rate model, and the numerical results are found to be in good agreement with the experimental data. It is found that the shock initiation and detonation behaviors of PBXC03 with the dominant component of HMX is mainly controlled by the hot‐spot ignition. The subsequent combustion reacts fast once the hot‐spot is ignited and shows an accelerated reaction characteristic. While, with the dominant component of insensitive TATB, the critical initiation pressure of PBXC10 is high enough to make almost saturated reactive hot spots just behind the precursory shock‐wave front, and the shock initiation behavior is basically determined by the combustion reaction, which is characterized by a stable reaction due to the slow combustion‐wave velocity.

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Effects of HMX Particle Size on the Shock Initiation of PBXC03 Explosive

Cited by 8 publications

References 5 publications

Embedded Manganin Gauge Measurements and Modeling of Shock Initiation in HMX‐Based PBX Explosives with Different Particle Sizes and Porosities

Embedded Manganin Gauge Measurements and Modeling of Shock Initiation in HMX‐Based PBX Explosives with Different Particle Sizes and Porosities

Nonholonomic Hamiltonian method for meso-macroscale simulations of reacting shocks

Comparative Analysis of Detonation Growth Characteristics between HMX‐ and TATB‐based PBXs

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