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

• Autorzy: Hussain T. , Yan L. , Fenglei H. , Yi L.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

shock desensitization; desensitization criterion; ignition and growth; Lee-Tarver model; detonation quenching; reflected shock ignition; EDC

• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2016
• Tom: Vol. 13, no. 2
• Strony: 357--379
• Opis fizyczny: Bibliogr. 40 poz., rys., tab.

Twórcy

autor

Hussain T.

• State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, P. R. China

autor

Yan L.

• State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, P. R. China

autor

Fenglei H.

• State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, P. R. China

autor

Yi L.

• State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, P. R. China

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.