On the Break‐Up of Shaped Charge Jets | Zendy

Haugstad B. | Zendy

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On the Break‐Up of Shaped Charge Jets

Author(s) -

Haugstad B.

Publication year - 1983

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.19830080407

Subject(s) - shaped charge , jet (fluid) , radius , perturbation (astronomy) , mechanics , wavelength , physics , plasticity , constant (computer programming) , classical mechanics , mathematics , thermodynamics , optics , chemistry , quantum mechanics , programming language , computer security , organic chemistry , computer science , explosive material

It is shown from dimensional arguments that the semi‐empirical jet break‐up formula of Hirsch (1) is consistent with physical models characterized by ideal plasticity (yield stress σ 0 ), the material initial density (ϱ 0 ), strain rate (η 0 ), and jet radius (r 0 ). Similar arguments applied to a one‐dimensional jet stretching model yields the existence of a maximum unstable perturbation wavelength, and fixes its value to within a numerical constant. Within the class of physical models considered the plastic velocity appearing in the Hirsch formula, the incremental velocity between successive fragments of a particulated jet, and the velocity (σ 0 /ϱ 0 ) 1/2 are all related, as originally conjectured by Hirsch.

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