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A Model for the Collapse of Explosively Driven Liners in spinning warheads

✍ Scribed by Joseph Carleone; Ryan Stefan

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
621 KB
Volume
18
Category
Article
ISSN
0721-3115

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✦ Synopsis

Abstract

An analytical model has been developed for the rapid collapse of explosively driven metal shells that includes the effects of material strength and shell spin. The model can be used to approximate the collapse process of shaped charges and EFPs. A closed form solution for shell velocity as a function of shell position is developed and compared to several two‐dimensional and three‐dimensional continuum mechanic numerical simulations. Comparisons with the simulations include a parametric evaluation of shell geometry, initial conditions, and material strengths.

The analytical model compares well with the numerical simulations for very thin shells. It shows that spin can significantly affect the final collapse velocity, and may even result in hollow penetrators. The model also shows that strength has a similar effect, and can greatly reduce the final collapse velocity.

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