Study On Penetration Performance Of Cyclic Cell Structure Composite Armor

Cycle cell structure composite armor has excellent performance to disturb the shaped charge jet stability and absorb shock waves. Cycle cell structure composite armor will be widely used on the armored vehicles. Cycle cell structure composite armor configuration comprised the following layers:high strength steel as the cover plate and metal confined space with liquid as the "sandwich" layer. The research of the anti-jet penetration property of cycle cell structure composite armor is an important research content in the research of shaped charge jet with the targets. This study can prove the armor design.The process of shaped charge jet vertically penetrating diesel-filled airtight structure and shaped charge jet penetrating cycle cell structure composite armor were studied by using method of combining theoretical analysis, numerical simulation and experimental research.(1) Based on virtual origin method and basic hypotheses, a theoretical model for a diesel-filled airtight structure disturbing the jet was established, and the expression of the disturbance velocity range of the jet was derived. The penetration resistance of different dimensions with diesel-filled airtight structure was studied by using simulation. According to the kinematic characteristics of diesel in the airtight space, the effects of dimensions of airtight container on the shaped charge jet stability and the residual penetration ability when the jet penetrates structure were analyzed. The reliability of the theoretical results and simulated results were validated by X-ray and residual depth of penetration experiments of the jet vertically penetrating a 30mm lumen diameter,30mm lumen height and 5mm wall thickness diesel-filled airtight structure. The results showed that radial converging diesel will seriously disturb the stability of the jet. The vessel lumen diameter and height have an influence on length and position of the jet that is disturbed by diesel fuel. The vessel wall thickness affects the intensity of radial converging diesel.(2) The process of the jet penetrating cycle cell structure composite armor contents three stages. The position of the initial interaction between a moving plate and a shaped charge jet when the jet penetrates cycle cell structure composite armor was studied. Based on virtual origin method and basic hypotheses, and the expression of maximum speeds of the disturbance velocity range of the jet were derived. The effects of honeycomb wall thickness and impact angle on the anti-jet penetration property of cycle cell structure composite armor were analyzed by using simulation. The reliability of the theoretical results and simulated results were validated by residual depth of penetration experiments. The results showed that increasing the wall thickness of the honeycomb can only improve the overall strength of the cycle cell structure composite armor, and cannot effectively improve the anti-jet penetration property. The impact angle affects position of the jet that is disturbed by cycle cell structure composite armor. Increasing impact angle can effectively improve the anti-jet penetration property.