GFRP粘接修复损伤铝板,粘接前对损伤铝合金表面采用不同浓度的硅烷偶联剂KH550、KH560进行处理,以未经偶联剂处理的铝板为对照组,通过拉伸试验与湿热试验研究偶联剂处理对修复效果的影响.试验结果表明:两种偶联剂KH550、KH560处理铝合金效果相当,铝板表面经1％～2％浓度的偶联剂溶液处理不仅有较高的初始强度,而且耐湿热性能也得到提高;湿热处理使不同表面处理的修理试样力学性能发生明显下降,同时,湿热环境对铝板-胶层之间粘接界面的渗透破坏要强于其对胶层-GFRP之间的界面破坏,铝板-胶层界面粘接强度的下降是引起试样性能下降的主要原因.
GFRP adhesive repaired damage aluminum,aluminum alloy surface was treated with different concentrations of the silane coupling agent KH550,KH560,and compared with non-treated aluminum sample.The repair effect was studied by tensile and humidity test.The results showed that two kinds of coupling agent KH550,KH560 have simular effect on repair sample.After treated with coupling agent of 1％ ～ 2％ concentration,the repaired samples have a high initial strength and the heat-resistant properties are also improved.Humidity treatment has significant adverse effects on the mechanical properties,and the damage of hygrothermal environment for aluminum-layer interface is stronger than layer-GFRP interface.The decrease of adhesive strength between aluminumlayer interface is the main reason of sample performance degradation.
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