首页|Penetration resistance of Al2O3 ceramic-ultra-high molecular weight polyethylene(UHMWPE)composite armor:Experimental and numerical investigations
Penetration resistance of Al2O3 ceramic-ultra-high molecular weight polyethylene(UHMWPE)composite armor:Experimental and numerical investigations
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To enhance the protective performance of ceramic composite armor,ballistic penetration experiments were con-ducted on Al2O3 ceramic-ultra-high molecular weight polyethylene(UHMWPE)composite armor with different thickness configurations.The damage and failure modes of hard projectiles and ceramic-fiber composite targets were analyzed.The recovered projectiles and ceramic fragments were sieved and weighed at multiple stages,re-vealing a positive correlation between the degree of fragmentation of the projectiles and ceramics and the overall ballistic resistance of the composite targets.Numerical simulations were performed using the LS-DYNA finite ele-ment software,and the simulation results showed high consistency with the experimental results,confirming the validity of the material parameters.The results indicate that the projectile heads primarily exhibited crushing and abrasive fragmentation.Larger projectile fragments mainly resulted from tensile and shear stress-induced failure.The failure modes of the composite targets included the formation of ceramic cones and radial cracks under high-velocity impacts.The UHMWPE laminated plates exhibited interlayer separation caused by tensile waves,permanent plastic deformation of the rear surface bulging,and perforation failure primarily due to shear forces.Through extended numerical simulations,while maintaining the same areal density and configuration of 9 mm Al2O3 ceramic+12 mm UHMWPE laminated composite armor,the thickness configurations of the Al2O3 ceramic and UHMWPE laminated backplates were varied,and various thicknesses of UHMWPE laminates were simulated as the cover layer for the ceramic panels.The simulation results indicated that the composite armor configuration of 10 mm Al2O3 ceramic+8 mm UHMWPE composite armor increased energy absorption by 13.48%.When altering the cover layer thickness,a 4 mm UHMWPE+9 mm Al2O3+8 mm UHMWPE composite armor demonstrated a 27.11%improvement in energy absorption,showing a relatively significant enhancement.
Composite armorAl2O3 ceramicUHMWPE laminatesDamage and failure modesBallistic performanceNumerical simulation
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