Study on the Formation of Reactive Material Shaped Charge Jet by Trans-Scale Discretization Method

Abstract

The formation process of reactive materials shaped charge is investigated by X-ray photographs and numerical simulation. In order to study the formation process, a trans-scale discretization method is proposed. A two-dimensional finite element model of shaped charge and reactive material liner is established and the jet formation process, granule size difference induced particle dispersion and granule distribution induced jet particle distribution are analyzed based on Autodyn-2D platform and Euler solver. The result shows that, under shock loading of shaped charge, the Al particle content decreases from the end to the tip of the jet, and increases as the particle size decreases. Besides, the quantity of Al particles at the bottom part of the liner has more prominent influence on the jet head density than that in the other parts, and the Al particle content in the high-speed section of jet shows inversely proportional relationship to the ratio of the particle quantity in the top area to that in the bottom area of liner.

Theoretical Model for the Impact-Initiated Chemical Reaction of Al/PTFE Reactive Material

“…After calculation based on the simulation model, the pressure-time history data of RM for each selected time were obtained from the Autodyn program using the print function [ 35 ]. These data were input into Equations (3)–(5) as loading conditions to calculate the hotspot formation induced temperature rise.…”

Study on formation characteristics of the shaped charge with an untypical reactive material composite liner

“…Byun Gyeongjun investigated the deposition state and self-propagating high-temperature synthesis reaction behavior of the Al-Ni deposit [3]. Domestic scholars have also done a lot of work for it, including, the corresponding penetration performance of PTFE high-density RM-liner [4], the enhanced lethality of RM-jet penetrating concrete target [5], the formation process of RM-liner shaped charge adopted cross-scale discretization method [6], etc.…”