STUDY ON ENERGY ABSORPTION CHARACTERISTICS OF ALUMINUM HONEYCOMB/UHMWPE COMPOSITE LAMINATE STRUCTURE AGAINST BALLISTIC IMPACT

Abstract

In this paper, the effects of pore density and thickness of honeycomb on the compressive deformation and buffer energy absorption characteristics of aluminum honeycomb/UHMWPE (Ultra-high molecular weight polyethylene) composite laminate structure were analyzed by quasi-static compression test and 9mm caliber gun ballistic impact test. According to the test results, the specific energy absorption of the aluminum honeycomb structure reaches 26~34J • cm/g. The maximum deformation depth of gelatin on the back of the aluminum honeycomb/UHMWPE composite laminate structure against ballistic impact decreases by 20% compared with UHMWPE fiber under the same surface density. The increase of the honeycomb thickness can improve the impact resistance of the composite layered structure. The honeycomb pore density and cell wall thickness are proportional to the anti-buffer energy absorption effect and it is inversely proportional to the crack diameter when the bullet impact the honeycomb structure. The aluminum honeycomb/UHMWPE composite laminate structure can absorb the impact kinetic energy of the bullet in a certain extent.