Theoretical and Experimental Study on the Performance of Steel and Concrete Multi-layer Composite Targets Against Shaped Charge Jet

Abstract

To investigate the ballistic performance of a five-layer composite target plate (steelconcrete-steel-concrete-steel) under the penetration effects of a shaped charge jet, a combined approach of static explosion tests and numerical simulations was employed.The study analyzed the ability of the steel target to enhance the penetration resistance of the composite target plate and explored the reasons behind this enhancement. The research results indicate that due to the influence of reflected and transmitted waves, the steel target effectively reduces the jet's ability to create holes and penetrate the subsequent concrete target; when facing the penetration of a 200-type standard projectile, a combination of three layers of 8mm steel targets is the optimal antipenetration structure, which can enhance the protective performance of the internal concrete protective structure by 65%; After adjusting the thickness ratios of the steel target plates in the composite target plate, it was found that when only increasing the thickness of a single layer of the target plate, the first layer must be increased to 24mm or the third layer to 22mm to fully resist the penetration of the shaped charge jet;Increasing the thickness of the third layer significantly impacts the composite target plate's penetration resistance, but thickening the first layer effectively reduces the diameter of holes in subsequent concrete target plates, thereby enhancing the stability of the composite protective structure. In the overall design of composite protection, adjusting the thickness ratios between different layers can be used to address various scenarios.