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Application of two numerical methods in penetration of layered plate impacted by spherical projectile


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Application of two numerical methods in penetration of layered plate impacted by spherical projectile
Zhou NanWang JinxiangXie JunPeng Chucai
National Key Laboratory of Transient Physics,NUST,Nanjing 210094,China
impact dynamics explosive welded plates finite element and smoothed particle hydrodynamics method ballistic performance damage model
The finite element method(FEM)and the coupling algorithm of finite element and smoothed particle hydrodynamics(FE/SPH)method are applied to simulate the penetration process of spherical projectile into layered plates,and the ballistic experiment is carried out to verify the effectiveness of numerical simulation.In experiment,a 14.5 mm slip chamber gun is used to launch the spherical steel projectile with 6 mm diameter to penetrate the various steel-aluminum explosive welding plates vertically.The feasibility of the numerical simulations in describing the results of experiment is discussed,and the effects of layer numbers,areal densities and layer combinations on the ballistic performance and the damage model are analyzed.The results show that,compared with the FE/SPH coupling algorithm,the FEM can not only reappear the tensile fracture morphology of layers more clearly,but have the better accordance with experiment for quantitative analysis.The Tie-Break model can reflect the influence of interface bonding strength well.The damage model of the front plate and the middle plate is shearing and plugging,the steel rear plate is petalling deformation and the aluminum rear plate is ductile deformation impacted by spherical projectiles vertically.The anti-penetration performance of steel-aluminum-steel three-layer plates is the best when the areal density is the same.


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Last Update: 2014-04-30