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A Model for the Collapse of Explosively Driven Liners in spinning warheads
Author(s) -
Carleone Joseph,
Stefan Ryan
Publication year - 1993
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.19930180512
Subject(s) - warhead , mechanics , shell (structure) , parametric statistics , spinning , structural engineering , physics , engineering , mechanical engineering , mathematics , aerospace engineering , statistics
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.