Experimental investigation on the low velocity impact responses of san filled aluminum honeycomb composite sandwich structures
LUO Weimin1 SHI Shaoqing1 SUN Jianhu1 LIU Yingfeng2
1. Department of Military Installations, Army University of PLA, Chongqing, 401331, China;
2. Chongqing International Construction Corporation, Chongqing 401121, China
Abstract:With the background of a protective structure designing, a kind of sandfilled aluminum honeycomb composite sandwich structures was put forward. The simplified sandfilled honeycomb model was analyzed from the standpoint of mechanics. By drop weight impact tests, the specimens with different core specifications were compared with the emptycore specimens under gradient impact. By comparing the changing of the impact load, the displacement of impactor, the deflection and the damage mode of specimens, some conclusions were drawn as follows: under lowenergy impact, the effect of filling sand on the strength promoting of the honeycomb structure with softer core and on the reducing of its deflection was relatively better; on the premise of the same mass, the honeycomb with smaller size and smaller height should be given priority to be adopted as the core of sandfilled composite sandwich structures for improving the specific strength or stiffness; under highenergy impact, as the core layer height reaches a certain value, the deflection of specimen decreases, and the damage scope is narrowed down to a local area with fully penetration. Filling sand in the honeycomb is beneficial to the improvement of impact resistance. The research provides a basis for the practical application of sandfilled aluminum honeycomb composite sandwich structures in protection.
罗伟铭1,石少卿1,孙建虎1, 刘盈丰2. 铝蜂窝填砂复合夹芯结构的低速冲击响应试验研究[J]. 振动与冲击, 2018, 37(10): 50-56.
LUO Weimin1 SHI Shaoqing1 SUN Jianhu1 LIU Yingfeng2. Experimental investigation on the low velocity impact responses of san filled aluminum honeycomb composite sandwich structures. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(10): 50-56.
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