For the purpose of protecting a cylindrical aluminum alloy projectile impacting with higher projectile velocity about 1.8～2.0 km/s,combined shields containing two aluminum alloy plates and a protecting shield are applied.High velocity impact tests are developed by two stage light gas gun,which alumina(Al2O3)/ultra-high molecular weight polyethylene(UHMWPE)plate,boron carbide(B4C)/UHMWPE plate and simplex UHMWPE plate with equal areal density 20 kg/m2 are separately used for the protecting shield.In AUTODYN software,an arbitrary sub-laminates model of UHMWPE plate is established and numerical simulation of the combined shields with simplex UHMWPE plate is developed,which the impact velocity is 1.92 km/s.As a result,with the equal areal density in the combined shields,the protection capability of the simplex UHMWPE plate is better than Al2O3/UHMWPE plate and the multiple-impact protection capability of the simplex UHMWPE plate is better than B4C/UHMWPE plate.With the application of the sub-laminates model of UHMWPE plate,the simulation results are consistent with test results.
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