Study On The Penetration Performance Of The Warhead Of The Electroplated Bimetal Liner

Shaped charge warhead,as the main means of anti-armor target,contribute greatly in the research of ammunition damage.With the improvement of modern armor protection capability,the damage power of shaped charge warhead faces new challenges.As the core of shaped charge,the material and structure of liner have direct influence on damage power.Therefore,this paper proposes a shaped charge structure of electroplated bimetal liner.Through digital simulation and validation,the study shows that the shaped charge structure of electroplated bimetal liner can form a jet with good performance and give consideration to both the penetration depth and the aperture of reamer,and has a good damage effect.This article through to a shaped charge warhead analysis of domestic and foreign research status,based on the principle of detonation shock wave propagation under load impedance matching,puts forward electroplating bimetallic liner shaped charge structure.under detonation loading,bimetallic interface supercharging effect,makes the liner is larger than single metal type liner down speed,and high jet velocity,sunder armor excellent performance.Based on the principle of impedance matching,this paper select sunder armor warhead commonly used copper,molybdenum,nickel,titanium,tantalum,tungsten metal six as double metal liner material for research,analyzes the deformation of metal material under compressive load behavior characteristics,according to the metal material under static and dynamic mechanical behaviour of stress-strain connection,obtained the basic mechanical properties of the material parameters,The Johnson-Cook constitutive equations of six metal materials are fitted.The nonlinear dynamics simulation software AUTODYN-2D was used to conduct numerical simulation of shaped charge jet forming of bimetal liner.The influence of inner and outer layer materials on shaped charge jet forming of bimetal liner was studied,and the shaped charge structure of bimetal liner was designed and optimized.The influences of liner angle,thickness,ratio of upper liner to lower liner height,explosive density and baffle diameter on jet forming are analyzed.Choose the optimized structure of jet destroying steel aim to carry on the numerical simulation,and analyses the influence of structural parameters of diaphragm and fry high jet penetrating steel target power,and adopts finally come to a shaped charge structure,the preparation of copper plating nickel type liner,the shaped charge warhead static sunder armor test,analysis of the copper plating nickel type liner shaped charge warhead penetration power.Through this study,the following conclusions are drawn:（1）Through the quiescent and kinetic mechanical capacity experiments of six metal materials,the stress-strain relationships of different materials under compressive loads were obtained,the material parameters of basic mechanical properties were obtained,and the Johnson-Cook constitutive equation of materials was fitted.（2）Through the numerical simulation of shaped charge jet forming of electroplated bimetal liner,the influences of liner angle,thickness,height ratio of upper and lower liner,charge density and baffle diameter on jet forming are analyzed,and the improved shaped charge structure is contained.（3）The influence of blast height on jet penetration performance was analyzed through digital simulation of shaped charge destroy into steel goal of electroplated bimetal liner.The shaped charge warhead of copper and nickel plated liner was prepared by using the optimized shaped charge structure.The static armour breaking test verified the reliability of numerical simulation results.