PBX 9502 Products Equation of State

Tang, P.K.

doi:10.1002/prep.19970220110

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…25) is used to represent the reaction model of PBX-9502. Parameters of PBX-9502 used in this numerical example come from reference [25] and [26] . The results of 13 mm and 50 mm PBX-9502 pushing Al plate are showed in Fig.…”

Section: Modeling Plate Push Experiments Of Pbx-9502mentioning

confidence: 99%

Simulation of one dimension shock initiation of condensed explosive by SPH method

Yang

Liu

et al. 2016

Engineering Computations

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Purpose This paper aims to study the ability of SPH method in simulating shock initiation process. The initiation and subsequent explosion processes of condensed explosive involve high pressure propagation and material large deformation, which increase the simulation difficulty in using traditional mesh-based method. The study aims to take the SPH method as an alternative method to shock initiation simulation. Design/methodology/approach The SPH method combined with some correct aspects is applied to simulate the shock initiation process. The condensed explosive is ignited by the impact of high speed flyer. In order to avoid the non-physical penetration between particles of high velocity flyer and condensed explosive, a particle-to-particle contact algorithm is employed. After the ignition, the detonation process of condensed explosive is represented by the ignition and growth model. A modified SPH method based on Riemann-solver is applied to smooth the numerical oscillation at shock front. Two numerical examples are implemented to illustrate the capability of SPH method in shock initiation simulation. One is the interface velocity experiment of PBX-9501. Another is the plate push experiment of PBX-9502. Both of the examples include the shock initiation process of condensed explosive. Findings Numerical results show that the shock initiation process of condensed explosive can be well predicted by SPH method. The characteristics of detonation are captured in the simulation. The measured data in numerical examples are also in good agreement with the experimental data. Research limitations/implications Because of the research purpose is to study the ability of SPH for shock initiation simulation, only one-dimension numerical examples are discussed in the paper. Therefore, researchers are encouraged to extend and test the proposed method to two or three dimension shock initiation problems simulation. Originality/value This paper provides an alternative method for shock initiation simulation. The implemented method can overcome the weaknesses of traditional mesh based method in simulation of shock initiation problems.

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Section: Modeling Plate Push Experiments Of Pbx-9502mentioning

confidence: 99%

Simulation of one dimension shock initiation of condensed explosive by SPH method

Yang

Liu

et al. 2016

Engineering Computations

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Characterization of Surface Properties of 1,3,5-Triamino-2,4,6-Trinitrobenzene by Inverse Gas Chromatography

Nie

Fan

et al. 2007

Chinese Journal of Chromatography

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The surface properties of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) with various particle sizes were characterized by inverse gas chromatography (IGC). The disperse component gamma s(d) of surface free energy of TATB samples increased as temperature increased. The larger the particle size is, the quicker the increasing rate of the disperse component will be as the temperature increases. The gamma s(d) of the coarse TATB is the highest (193.2 mJ/m2) and that of the submicron TATB is the smallest (64.0 mJ/m2) at 353 K. Due to the different preparation processes and particle sizes, the samples show obviously different Lewis acid-base properties. Fine TATB can provide positive Lewis acid-base active sites and has higher acidity. The specific components of the adsorption of polar probes on the surface of the other three types of TATB were found to be endothermic owing to the strong hydrogen bond of inter- and intra-TATB molecules. Their surface acidity and basicity constants, K(a) and K(b) are negative.

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Hugoniot measurements of the 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) formulation T2 up to 70 GPa

Sollier,

Hébert,

Lescoute

et al. 2024

Journal of Applied Physics

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We present shock Hugoniot measurements of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) T2 formulation up to 70 GPa. Despite the use of very thin samples, strong reactivity is evidenced above 30 GPa, indicating that our high pressure points are rather overdriven reaction product measurements than inert Hugoniot measurements. However, the comparison of these new high pressure Hugoniot data obtained on a TATB formulation with those previously obtained in a similar pressure range on single-crystal (SC) TATB samples allows us to decouple kinetics effects from the crystalline nature. Additional classical molecular dynamics simulations are performed to help understand the influence of imperfect hydrostatic conditions on SC TATB behavior at moderate and high pressures. The present data can be used to further improve existing models at very high pressures and to perform more conclusive high pressure Hugoniot experiments on both SC and formulated TATB samples.

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PBX 9502 Products Equation of State

Cited by 3 publications

References 5 publications

Simulation of one dimension shock initiation of condensed explosive by SPH method

Simulation of one dimension shock initiation of condensed explosive by SPH method

Characterization of Surface Properties of 1,3,5-Triamino-2,4,6-Trinitrobenzene by Inverse Gas Chromatography

Hugoniot measurements of the 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) formulation T2 up to 70 GPa

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