Abstract: Two major geometric approaches of anti-impact property optimization in sandwich plates with aluminum folded core were studied by FEM. Impact resistance of the sandwich panels was enhanced by increasing of panel thickness and core wall thickness, while increasing core wall thickness gave the structure better energy absorption characteristics and efficiency. In real case, sandwich products were subjected to random impact load in service life, damages in sandwich plates caused by different impact angles were compared. The results show that with the increase of impact angle, damages of sandwich plates decrease, the damages of folded core gradually decrease than that of upper panel, and energy absorptions of the sandwich panel decrease. 

Key words: sandwich plate, low-velocity impact, energy absorption, finite element method(FEM)

摘要： 通过有限元方法对比研究了两种常见提高铝褶皱夹层板抗冲击特性的方法。增大面板厚度和芯层壁厚均可提高夹层板的抗冲击性能，而增大芯层壁厚可使结构的吸能特性和吸能效率更优。在实际应用中，夹层板受到的外来冲击是随机的，因此对夹层板不同角度冲击的损伤进行了仿真分析。发现随着冲击角度的增大，夹层板损伤减轻，褶皱芯层的损伤程度逐渐小于上面板，夹层板总体吸能降低。

关键词: 夹层板, 低速冲击, 吸能, 有限元方法