A Pore Collapse Model for Hot-spot Ignition in Shocked Multi-component Explosives

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

doi:10.1515/ijnsns.2010.11.s1.19

Cited by 31 publications

(44 citation statements)

References 2 publications

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“…Although some physics-based shock initiation models [15][16][17] have been reported to account for the desensitization phenomena, these models require huge computation resources. On the other hand, most of the phenomenological reactive flow models are incapable of simulating the desensitization induced by pre-shocking.…”

Section: Modelling Effortsmentioning

confidence: 99%

Desensitization by Pre-shocking in Heterogeneous Explosives and its Numerical Modelling

Hussain¹,

Liu²,

Huang³

et al. 2016

Cent. Eur. J. Energ. Mater.

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Abstract:Desensitization caused by pre-shocking in heterogeneous explosives is discussed. The aim of this study was to find a simple numerical model that could reproduce the important features of previously reported shock desensitization experiments. After reviewing the previous experimental results and modelling efforts, an extension of the Lee-Tarver reactive flow model is proposed. The proposed desensitization model is based upon the experimentally determined desensitization criteria for explosives. The additional parameters required for this extension can be calibrated by experiment for a typical explosive. The new model has been implemented in the hydrodynamic code LS-DYNA as a user defined equation of state, and is now available to simulate various kinds of situations involving explosives up to the limits and capabilities of LS-DYNA. Desensitization by pre-shocking in double shock experiments, reflected shock and detonation quenching experiments have been studied using the new model, and the results were found to be in qualitative agreement with the experimental results reported in the literature.

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Section: Modelling Effortsmentioning

confidence: 99%

Desensitization by Pre-shocking in Heterogeneous Explosives and its Numerical Modelling

Hussain¹,

Liu²,

Huang³

et al. 2016

Cent. Eur. J. Energ. Mater.

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“…The three terms in this model are in turn the hot-spot ignition [12], the lowpressure slow burning [13] and the high-pressure fast reaction terms [14], respectively. In general, the mesostructure of a PBX explosive can be sketched as shown in Figure 1.…”

Section: Dzk Hot-spot Model and Dzk Reaction Rate Modelmentioning

confidence: 99%

“…For example, Hamate and Horie [10] developed a physics-based reactive burn (PBRB) model which describes the initial temperature effects by introducing an Arrhenius-type reaction rate, but the calculated numerical result shows that the Chapman-Jouguet detonation velocity of the explosive is not affected by the initial temperature, although the transition time to the steady detonation increases as the initial temperature decreases. Recently, based on Kim's hot-spot ignition model [11], Duan et al [12] develop an elastic/viscoplastic pore collapse model of a doublelayered hollow sphere (or the DZK hot-spot model), in which the mesostructure and the initial temperature of a plastic bonded explosive (PBX) are taken into account for the description of the hot spot evolution in the PBX explosives. The DZK hot-spot model is further complemented into a mesoscopic reaction rate model, by which the DZK reaction rate model is developed [12].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, based on Kim's hot-spot ignition model [11], Duan et al [12] develop an elastic/viscoplastic pore collapse model of a doublelayered hollow sphere (or the DZK hot-spot model), in which the mesostructure and the initial temperature of a plastic bonded explosive (PBX) are taken into account for the description of the hot spot evolution in the PBX explosives. The DZK hot-spot model is further complemented into a mesoscopic reaction rate model, by which the DZK reaction rate model is developed [12]. The DZK reaction rate model contains three terms: the hot-spot ignition term, the low-pressure slow burning term put forward by Kim [13] and the high-pressure fast reaction term proposed by Zhang et al [14] Previous work [12,15,16] shows that the DZK reaction rate model can indeed predict well the effects of the particle size, the porosity and both the strength and the content of the binder in a PBX explosive on the shock initiation.…”

Section: Introductionmentioning

confidence: 99%

“…The DZK hot-spot model is further complemented into a mesoscopic reaction rate model, by which the DZK reaction rate model is developed [12]. The DZK reaction rate model contains three terms: the hot-spot ignition term, the low-pressure slow burning term put forward by Kim [13] and the high-pressure fast reaction term proposed by Zhang et al [14] Previous work [12,15,16] shows that the DZK reaction rate model can indeed predict well the effects of the particle size, the porosity and both the strength and the content of the binder in a PBX explosive on the shock initiation. However, the initial temperature effects have not been involved.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Prediction of Initial Temperature Effects on Shock Initiation of Solid Explosives by Using Mesoscopic Reaction Rate Model

Duan

Liu

Zhang

et al. 2014

International Journal of Nonlinear Sciences and Numerical Simulation

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A kind of mesoscopic reaction rate model is reexamined in this paper with the aim of getting rid of the temperature dependence of its experiential parameters and making it available to predict the shock initiation of solid explosives under different initial temperatures. It is found that the initial temperature effect is induced mainly by the temperature dependence of the local chemical reaction rate and the initial density of the explosives, and, via the introduction of such temperature dependence, the reaction rate model can predict well the shock initiation processes under different initial temperatures, in which just the experiential parameters under a certain temperature (e.g. the normal temperature) are needed. Moreover, for verification, the shock initiation processes of PBX-9501 under different initial temperatures were simulated numerically by using the DYNA2D software. The numerical results on the run distance to detonation are found to be in good agreement with previous experimental data.

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Numerical Research on Initiation of PBXC03 Explosives under Quasi‐Isentropic Loadings

Liu

Duan

et al. 2018

Propellants Explo Pyrotec

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To study the influence of different quasi‐isentropic loading modes on the ignition and the detonation growth processes of PBXs, a one‐dimensional numerical model based on the DZK reaction rate model is presented, and then the parameters of DZK reaction rate model of PBXC03 can be experimental calibrated under the quasi‐isentropic loadings. Moreover, the ignition and detonation growth processes of PBXC03 under different quasi‐isentropic loading modes are simulated by using DYNA2D. It is found from the numerical results that both the increase of the peak pressure of shock front and the shock wave speed increase but the time to detonation decreases with the peak loading pressure, loading slope and curvature. It is also found that the explosive initiation process under the quasi‐isentropic loadings can be divided into two stages: one is the initial stage that manifests mainly as the catch‐up and convergence of the quasi‐isentropic waves and the formation of shock waves; the other is the stage of shock initiation, in which a shock wave with a certain intensity is formed and grows gradually into a stable detonation wave. In addition, a necessary condition is proposed to discriminate the feasibility of an quasi‐isentropic loading experimental calibration of the EOS parameters of a unreacted explosive, i. e., the sample's thickness must be smaller than the thickness of initial reaction.

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A Pore Collapse Model for Hot-spot Ignition in Shocked Multi-component Explosives

Cited by 31 publications

References 2 publications

Desensitization by Pre-shocking in Heterogeneous Explosives and its Numerical Modelling

Desensitization by Pre-shocking in Heterogeneous Explosives and its Numerical Modelling

Prediction of Initial Temperature Effects on Shock Initiation of Solid Explosives by Using Mesoscopic Reaction Rate Model

Numerical Research on Initiation of PBXC03 Explosives under Quasi‐Isentropic Loadings

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