夹层结构剥离强度下降原因分析

针对J-116胶膜粘接的铝板和铝蜂窝夹层结构,采用两种固化工艺,两种浸水条件、喷淋盐雾和两种刀具加工试样,对夹层结构的板板和板芯90°剥离强度进行了测试,分析了剥离强度下降的规律.研究结果表明:水的长期作用,会使胶接强度降低,温度会加速水的作用；盐雾和大气曝晒的影响较小,旧刀具对蜂窝芯子造成二次破坏,直接导致板芯剥离强...

Analysis of the Peel Strength Decrease of Sandwich Structure

The aluminum sheet and almninum honeycomb sandwich structure panel bonded with J-116 adhesive films was used as sample in this experiment. The samples were treated by two curing technologies, two kinds of water immersion conditions, salt spray test and two kinds of cutters. The peel strength at 90°direction of panel to panel and panel to core was tested, and the law of peel strength decrease was analyzed. The study indicated that the bonding strength would decrease because of the long term of water action; and the temperature would accelerate this action. The salt spray and exposure in air had little effect on the peel strength; the old cutter would induce secondary damages to the honeycomb core, as a result, the peel strength of sheet core structure would decrease significantly. The following conclusions were drawn from all of the experiments： manufacture process and introduetion of water or humidity of sandwich structure were the main factors which caused the decrease of peel strength.