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Science and Technology of Energetic Materials

Vol.66, No.2 (2005)

Article

Influence of pressure wave propagating in compressed emulsion explosives on detonator
Fumihiko Sumiya , Yoshikazu Hirosaki, and Yukio Kato
p.266-273

Abstract

To clarify the dead-pressing phenomena of explosives, the pressure profiles inside emulsion explosives were measured under the laboratory conditions. Two types of glass microballoons, one type of resin microballoon and micro bubbles of chemical gas were used as sensitizer for sample emulsion explosives. The underwater explosion technique was used for loading dynamic pressure into the sample emulsion explosives. Measured pressure profiles were remarkably different depending on the type of microballoons or micro bubbles. The impulse of pressure wave was independent of the type of microballoons or micro bubbles. To elucidate the influence of pressure wave on the detonator in sample explosives, a study on squeezing of the detonator shell was conducted using the similar technique. While the impulse of pressure wave was almost same, a remarkable difference in the degree of deformation was observed depending on the type of microballoons or micro bubbles. Good relationship between the scaled distance and squeeze ratio was observed.

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