Desensitization of pressed explosive compositions based on TNT, RDX, and HMX under double shock-wave loading

Bat'kov, Yu. V.; Glushak, B. L.; Novikov, S. A.

doi:10.1007/bf00789372

Cited by 7 publications

(3 citation statements)

References 1 publication

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“…It was found that the run distance to detonation in the pre-shocked explosive was simply the sum of the distance at which the two shocks coalesced and the run to detonation distance expected for the second shock wave from Pop-plot data. The experimental work by Bat'kov et al [10] also reveals the decrease in shock-wave sensitivity of pressed TNT and TNT/RDX compositions (50/50 and 30/70) caused by pre-shocking.…”

Section: Experimental Evidencementioning

confidence: 91%

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: Experimental Evidencementioning

confidence: 91%

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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“…Much experimental research carried out to study various aspects of the desensitization phenomena has been reported. 3–11…”

Section: Introductionmentioning

confidence: 99%

Modeling and simulation of preshock desensitization in heterogeneous explosives using a mesoscopic reaction rate model

et al. 2015

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To understand and predict the response of explosive materials, numerical models are utilized to simulate various scenarios. Various hazard and vulnerability scenarios for explosives involve multiple shock compression. In the present study, a kind of mesoscopic model for shock ignition of solid heterogeneous explosives is examined in order to demonstrate its availability to account for the desensitization caused by multiple shocks in explosives. Since the mesoscopic model is based on the assumption of the elastic viscoplastic pore collapse mechanism, and on the other hand the desensitization mechanism is also usually described in connection with the closure of pores, the ability of the mesoscopic model to predict the desensitization effects must be analyzed. For this purpose, the mesoscopic model has been implemented in a hydrodynamic code (LS-DYNA) as a user-defined equation of state. For verification, the double shock, reflected shock and detonation-quenching experiments have been modeled and simulated. The data show that the model can reproduce various features of some of the previously reported experiments involving the preshock desensitization of solid explosives.

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“…Along with these original experiments, many shock desensitization studies have been done using various explosives using weak shocks plus detonation waves, two shocks, or reflected shocks. – Only three studies of TATB-based PBX’s are known to have been published. Ferm and Hull studied shock initiation of PBX 9502 (95% TATB/5% KelF) experimentally and numerically using shocks reflected off high impedance boundaries at various angles.…”

Section: Introductionmentioning

confidence: 99%

Corner Turning and Shock Desensitization Experiments plus Numerical Modeling of Detonation Waves in the Triaminotrinitrobenzene Based Explosive LX-17

Tarver

2010

J. Phys. Chem. A

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Five new experiments are reported that tested both detonation wave corner turning and shock desensitization properties of the triaminotrinitrobenzene (TATB) based plastic bonded explosive (PBX) LX-17. These experiments used small pentaerythritol tetranitrate (PETN) charges to initiate hemispherical ultrafine TATB (UF TATB) boosters, which then initiated LX-17 hemispherical detonations. The UF TATB boosters were placed under steel shadow plates embedded in the LX-17 cylindrical charges, which were covered by thin aluminum plates. The LX-17 detonation waves propagated outward until they reached the aluminum plates, which were instrumented with photonic Doppler velocimetry probes to measure their axial free surface velocities. X-ray radiographs and framing camera images were taken at various times. The LX-17 detonations propagated around the two corners of the steel shadow plates and into thin LX-17 layers placed between the steel and the top aluminum plates. The detonation waves were met there by weak diverging shocks that propagated through the steel plates and imparted 1-2 GPa pressures to these unreacted LX-17 layers. These weak shock waves compressed and desensitized the unreacted LX-17, resulting in failures of the LX-17 detonation waves. The hydrodynamics of double corner turning and shock desensitization in the five experiments were modeled in two dimensions using the Ignition and Growth LX-17 detonation reactive flow model. The calculated arrival times and axial free surface velocity histories of the top aluminum plates were in excellent agreement with the experimental measurements.

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Desensitization of pressed explosive compositions based on TNT, RDX, and HMX under double shock-wave loading

Cited by 7 publications

References 1 publication

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

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

Modeling and simulation of preshock desensitization in heterogeneous explosives using a mesoscopic reaction rate model

Corner Turning and Shock Desensitization Experiments plus Numerical Modeling of Detonation Waves in the Triaminotrinitrobenzene Based Explosive LX-17

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