Abstract
A numerical simulation of the ignition of organic explosives (PETN, HMX, RDX, TATB) with an electron beam was performed. A criterion for the ignition of energetic materials with a melting point below the temperature of ignition is obtained. The results of numerical calculations of the critical energy density of the electron beam are consistent with the criterion of ignition. Calculations of the critical energy density of PETN ignition in good agreement with the experiment. The most sensitive is PETN and the most heat-resistant is TATB.
Highlights
There has been a considerable increase in the number of papers on both experimental studies and numerical simulation of the conditions of explosive initiation by electron pulse [1,2,3,4,5,6]
The majority of the experiments on organic explosive initiation are done with PETN
The critical energy density of an electron beam W ∗, which leads to the initiation of PETN in the area of the absorption of the electron beam, is ∼ 15 J/cm2 at the initial energy of electrons E0 = 250 keV and the time of delay ∼ 3.45 s [1]
Summary
There has been a considerable increase in the number of papers on both experimental studies and numerical simulation of the conditions of explosive initiation by electron pulse [1,2,3,4,5,6]. In case of free surface, the detonation of the PETN compressed tablets takes place while the absorption of the electrons which energy density is WD ∼ 60 J/cm and initial energy is E0 = 450 keV. The objective of the current paper is to find out if the thermal model qualitatively describes the experimental data on PETN initiation by a broad electron beam ignoring thermoelastic stress and autocatalisys reaction. It would be quite interesting to carry out calculations and predict the threshold density of electron beam energy for initiation of RDX, HMX and TATB
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