Science and Technology of Energetic Materials

Vol.63, No.6 (2002)

Research paper

Fragment impact of cased explosive
Wing Cheng, Scott Langlie, Shan Lin, and Shigeru Itoh


Fragment impact of cased explosives was studied by experimental testing and numerical modeling. The objective was to obtain a better understanding of detonation phenomenon and to determine if case explosive of a specific warhead configuration will detonate when subjected to impact of an 80 - gram Fragment Simulated Projectile (FSP) at various impact velocities. The stress was measured on the backside of the steel plate in a ballistic test uslng an experimental technique. Relationship between impact velocity against a warhead casing and presure induced between the warhead casing and the explosive was determined. Numerical modeling of this experiment was performed using a hydrodynamic code, to validate the results of the experiment in predicting the impact pressure on the backside of the steel plate. At the end, numerical modeling of a 80 FSP impacting a steel plate, which was backed by unconfined cased H6 explosive was used to predict detonation of the explosive. Of the impact velocities studied, ranging from 235 m / s to 2,225 m / s, only impact velocity of 2,225 m / s resulted in severe detonation.

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