Deformation, Fragmentation and Acceleration of a Controlled Fragmentation Charge Casing

Abstract

This paper presents a study on the ability of two finite element software to predict the deformation, fragmentation and acceleration of a controlled fragmentation charge casing. In order to acquire data for the evaluation, a series of instrumented experiments have been performed using a laboratory charge with an internal grooved casing. Comparisons to experiments show that both software can predict the change in deformation behaviour when the groove depth increases, from tangential necking for shallow grooves to radial punching for deep groves. Both software could also reasonable well predict the acceleration of the fragments, though both overestimates the terminal velocity for the charge with the deepest grooves. This is an extended abstract of a full paper published in Defence Technology, 2019.