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Simulation Study on EFP with Stable Tail Fins Formed by Polygonal Shaped Charge Liner
Abstract
To ensure the flight stability of a modern explosively formed projectile (EFP) with a high standoff distance, the feasibility of forming an EFP with a high length-to-diameter ratio (L/D) by a polygonal charge liner was investigated by using a three-dimensional simulation. The results revealed that an optimal EFP structure with a large L/D and stable tail fins could be achieved when using 0.8De (diameter of liner circumcircle) as the outer curvature of the thickness-varying hexagonal hemispherical liner, 0.0325De as the top thickness, and 0.2 as the bottom-to-top thickness ratio. However, when the number of edges was more than 12, the tail fins would start to transition to pleated fins and become more prone to fracturing.
Keywords
Explosion Mechanics, Tail Fins EFP, Numerical SimulationText
DOI
10.12783/ballistics2019/33226
10.12783/ballistics2019/33226
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