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Science and Technology of Energetic Materials

Vol.66, No.4 (2005)Special Issue for ISEM 2005

Research paper

Influence of shock wave propagating in case on the detonation characteristics
Fumihiko Sumiya, Hideki Hamashima, Yukio KATO, and Shigeru Itoh
p.327-333

Abstract

The detonation characteristics of non-ideal explosives, especially the emulsion explosives, are critically affected by the confinement of case. In this study, we focused the shock wave propagating in case as confinement effect factor. Therefore, the objective of this study was to obtain a better understanding of the influence of shock wave propagating in case on the detonation characteristics of explosives.

The propagation of shock wave in case material and in material filled into case was investigated. Polymethylmethacrylate (PMMA), copper and aluminum were chosen as a case material. Water and the emulsion explosives were used as sample material confined in case. Good relationship between the acoustic impedance density, which is derived from the product of density and sound velocity, and detonation velocity was observed.

In addition, the detonation characteristics of emulsion explosives precompressed by shock waves induced by precursor shock wave propagating in PMMA case were investigated by another experiments. It was confirmed that the detonation characteristics of emulsion explosive was affected by the precursor shock wave propagating in PMMA case.

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Keywords

Shock wave, Emulsion explosive, Case material, Propagation speed, Visualization

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