Research on penetration resistance of different structured B4C/Al composites
B4C/Al composite plates with a volume fraction of 50%were prepared using a pressure infiltration meth-od.Six types of composite structural plates were fabricated based on the design concept of"high-hardness impact surface+composite transition layer+tough backing plate,"and penetration tests were conducted to study the pen-etration resistance and damage modes of the materials under different impact surfaces,thicknesses,and backing plate conditions.The entire process of bullet penetration into the target plate was numerically simulated using LS-DYNA,and the reliability of the calculations was validated based on the experimental results.Furthermore,the ener-gy absorption mechanism of the composite material under failure was analyzed.The results indicate that while the composite material serves as an impact surface,its protective effect is not significant;however,it acts as an excel-lent penetration-resistant transition layer.Polyethylene(PE)demonstrated superior deformation capability as the backing material compared to Kevlar and carbon fiber materials.The three-layer structure of"B4C ceramic+com-posite material+PE"exhibited better protective performance than the two-layer structures of"ceramic+PE"or"composite material+PE/Kevlar."Both the damage morphology of the impact surface and the backing plate's bul-ging failure showed low discrepancies between the numerical simulation results and the experimental data.
metal matrix compositesballistic penetration testnumerical simulationdamage mode
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