Experimental and numerical study of shock-to-detonation transition in tri-amino-tri-nitro-benzene explosive with temperature effects

The present work completed a series of one-dimensional plate impact experiments combined with an temperature control system, which could study the temperature effects on shock initiation characteristics of the tri-amino-tri-nitro-benzene (TATB)-based explosives. Buildup to detonation was measured with aluminum-based electromagnetic particle velocity (EMV) gauge technique, and the shock tracker gauges recorded the change in position of shock wave in the explosive sample over time. As temperature cooling to −20°C, the fitting line of Hugoniot had an obvious inflection point, and the run distance to detonation became longer than ambient temperature under the same initiation pressure, indicating that the explosives became less sensitive. Finally, the numerical simulation of the shock initiation process for explosives was performed by the Arrhenius, Wescott, Stewart, and Davis (AWSD) reaction rate model. The results indicated that the AWSD reaction rate model based on the impact temperature and pressure can better simulate the shock-to-detonation transition at different temperatures by only one set of model parameters.