Study On Penetration Performance Of Multi - Layer Composite Composite Structures

A multilayer dielectric composite structure capable of shot-proof to great mass fragments with high velocity was presented in this paper. Firstly, the minimum defense standard of the multilayer dielectric composite structure is determined and a scheme of protection structure is proposed based on the analysis of the motion rule of fragments generated after the typical anti-ship missile warhead explosion;Secondly, through the ballistic test of the composite structure, the ballistic limit velocity of fragment penetrating the designed protective structure is obtained;While the AutoDyn simulation model is established, and the variation law of shot-proof properties of the composite structure under different conditions is discussed by the simulation results, finally, the composite structure has made the corresponding optimized and proposed design principles.For initial velocity and velocity attenuation law of fragments generated after the anti-ship missile explosion made correlation analysis calculations to determine the multilayer dielectric composite structure required to achieve a minimum standard of defense: 1532.57m/s; Through the research of failure mecha nism of composite structure puts forward a preliminary scheme of structure design, namely: low carbon steel panel + ceramic plate + ceramic plate + UHMWPE fiber board + spacer layer + low carbon steel backboard.Using rifled ballistic gun loading massive fragment penetrating multilayer dielectric composite structure of the ballistic test to give the corresponding ballistic limit speed: 1628.5m/s, explained composite structure to meet the minimum standards of defense, as well as analyzed and summarized the d estruction of the multilayer dielectric composite structure in each layer of the target.It was simulated on the basis of verified by the test results to obtain the optimal structure of multilayer dielectric composite structure is as follows: 5mm low carbon steel panel + 20 mm spacer layer + 20 mm ceramic plate +20mm ceramic plate + 20 mm UHMWPE fiber board +10mm low carbon steel backboard; Comparison of shot-proof properties of the multilayer dielectric composite structure, kevlar sandwich composite structure and glass fiber sandwich composite structure, the results show that when the thickness of the three structures is the same, the shot-proof properties of the multilayer dielectric composite structure is the best, When the shot-proof performance of three structures are the same, the multilayer dielectric composite structure of the thinnest thickness, and its surface density is higher than Kevlar sandwich composite structure. Last, the principle of multilayer dielectric composite structure design should follow based on simulation results was made.