Science and Technology of Energetic Materials

Vol.66, No.5 (2005)Special Issue for ISEM 2005


Studies of XDT phenomena under fragment impact conditions
P. J. Haskins, M. D. Cook, and P. J. Cheese


In this paper we present the results of our experimental studies aimed at understanding the conditions under which XDT may occur as the result of fragment impact, and elucidating the mechanism(s) responsible. We have used a 30mm powder gun to launch a variety of projectiles at velocities up to ca. 2100 m s-1 at a range of explosive targets. In particular, we have studied the necessary conditions for XDT to occur when energetic material is free to expand across a void before subsequent re-compression / re-shock against a surface. We have shown that under certain conditions XDT can occur with cast-cured and pressed PBX's as well as traditional melt-cast materials. We discuss the implications of these results with respect to the mechanism responsible for XDT, and also the relevance to weapon safety.

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