Preformed Fragment Velocity Distribution of Elliptical Cross-section Projectile

Abstract

In the field of warhead design, non-cylindrical warhead, especially elliptical cross-section warhead, has received considerable attention. In this study, the initial velocity and distribution characteristics of the preformed fragments of a columnar projectile with an elliptical cross-section were examined. To obtain the velocity distribution of the fragments in this kind of projectile, three elliptical cross-section projectiles with different geometric sizes were test based on the static detonation tests. Then, the numerical models of the elliptical cross-section projectile have been established and validated according to the experiment results. Besides, two kinds of initiation types were studied by the simulation model, and the results indicate that not only the geometric size but the initiation type do great influences on the fragment velocity distribution in the direction of the axis. An empirical model was proposed based on the fragment two-step acceleration progress, and it was in good accordance with numerical results.

Dispersion Properties of Fragments of Square Metal Shells Driven by Explosive Loading

“…D-shaped charge refers to the charge structure whose cross section has the shape of the letter 'D', which can achieve a higher gain of damage energy in the aim direction through the optimisation of the structural design and initiation mode [3]. Deng et al found that an oval charge structure had a fragment focusing effect in the direction of the minor axis of the oval [4]. As indicated by these studies, the occurrence scenes of the explosion damage and fragment dispersion property of non-axisymmetric shells have gradually become common.…”