A study of detonation processes in heterogeneous high explosives

Abstract

A model of multiple processes is used to simulate the behavior of reaction in detonation of heterogeneous high explosives. The features of the model are (1) the partition of the explosive medium into hot spots and the region exclusive of hot spots and (2) the separation ofthe mechanical-thermal process and chemical process. For each process, a characteristic time is assigned and is defined by a phenomenological relation. With assumptions, some fast processes are ignored in the governing equations. This investigation indicates the necessity of including a slow process near the end of the reaction. Comparisons with experiments using a Fabry-Perot velocimeter are presented for triaminotrinitrobenzene.[This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to ] IP: 130.216.

The Measurement of Electrical Conductivity in Detonating Condensed Explosives

“…Typical voltage and current data are shown in (2-7) and (2)(3)(4)(5)(6)(7)(8). By correcting for L. di/dt the true voltage can be plotted versus the current, so that the resistance may be obtained.…”

“…Many other researchers have observed, or suggested, that the detonation process in even ideal explosives requires relatively long distances (many charge diameters) to stabilize. Notable references to these effects include Ramsay, 14 Jones, 16 Mader, 8 and Bdzil. 19 Clearly nonideal explosives, such as Leiper's, are likely to take even longer to stabihize.…”

Pressure-sensitive dissipation in elastomers and its implications for the detonation of plastic explosives

“…Clearly, the same mechanism cannot be invoked in the absence of pressure influence on the shear response of a rubbery binder. Further investigations need to focus on the development of typical constitutive laws of evolution and growth of hot spots in high explosives with the ultimate aim of developing experimentally supported engineering models of detonation [37][38][39] for use in large-scale computational codes.…”