An improved correlation for reliable assessment of the detonation performance of non‐ideal explosives containing metals and the other solid particulates

Abstract

Explosives containing metals and the other solid particulates have wide applications in air-blast and underwater explosives. Due to the non-ideal behavior of these explosives, available complex computer codes and empirical methods cannot usually provide a reliable estimation of their detonation velocity. Large experimental data of detonation velocity (392 experimental data) corresponding various types of ideal and non-ideal explosives were collected from different sources to derive a general correlation. The new model assumes partial secondary reactions of metal and active particulates with gaseous products. Optimum values of different products are obtained by maximizing the coefficient of determination (R 2) of the correlation and minimizing the mean absolute percentage error (MAPE) of the calculated results from experimental values of detonation velocities. The MAPE values of the new model and one of the best available methods are 3.55 and 11.16 respectively, for 90 non-ideal explosives, which confirm much high reliability of the new method.

Experimental and numerical studies of fragmentation shells filled with advanced HMX-plastic explosive compared to various explosive charges

“…The values of these constants for the explosive materials have been determined either from dynamic test experiments or the cylinder expansion test (Lee et al 1968;Tarver et al 1996). Jafari et al have presented different improved methods to determine the detonation performance of ideal and non-ideal explosive compositions (Jafari et al 2021;Jafari and Keshavarz 2017;Keshavarz et al 2020). In this study, the values of the above mentioned constants are available in the Autodyn material library of and listed in Table 2 for the studied explosive materials.…”

Metastable aluminum boride: density functional theory study of prerequisites of formation

“…Aluminum borides and aluminum–boron composite powders have significant practical interest as energetic additives to fuels, explosives and propellants due to their high heat of combustion and satisfactory combustion kinetics [1]. In particular, a preliminary assessment of energy parameters of explosives with a composition of 10%Al–90%HMX and 10%“Al2B”–90%HMX, performed according to the methods described in [2–4], indicates a considerable advantage of the latter to provide a higher detonation pressure. Besides, aluminum borides are used in wear‐resistant coatings [5, 6], composite materials [7, 8], and abrasive compounds [9] due to their specific advantageous physical and mechanical properties.…”