Penetration Effect of Tungsten Alloy Spherical Projectile on CFRP-coated B4C Ceramics
The failure mechanism and protective properties of carbon fiber reinforced composite(CFRP)-coated boron carbide(B4 C)ceramic target plates under the penetration of tungsten alloy spherical projectile are investigated,the protective properties of the composite structure under different D/T,where D represents the projectile diameter,and T represents the ceramic thickness,are experimentally studied and numerically simulated.The residual velocity of projectile after penetrating the target and the damage morphology of target plate are obtained through ballistic impact tests,and the failure characteristics of B4C ceramics and CFRP at different penetration speeds are analyzed.The numerical simulation model of tungsten alloy spherical projectile penetrating the target plate is established,and the accuracy of the model is verified by reproducing the experiment results.The influence of CFRP on the penetrating effect of tungsten projectile is compared and analyzed.Based on the numerically simulated results,a residual velocity calculation model of tungsten projectile penetrating the target plate is established,and the accuracy of calculation model is verified by the experimental results.The findings indicate that,under the vertical penetration of projectile into the target plate,the CFRP exhibits a circular fracture on the impact surface and a cross-shaped fracture on the back surface.The damage area of CFRP on the back surface is larger than that on the impact surface.With the increases in penetration speed and target thickness,the change amplitude of the damage area of CFRP on the back surface is larger than that on the impact surface.It is found that the anti-penetration performance of CFRP-coated B4C ceramic target plate is 4.8％higher than that of B4C ceramic target plate.Compared with the experimental results,the absolute value of relative error computed by the proposed calculation model is less than 15％.
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