玻璃纤维-铝合金层合板氙灯老化性能研究

目的研究氙灯环境对玻璃纤维-铝合金层合板性能的影响。方法通过研究玻璃纤维-铝合金层合板在氙灯老化后的力学性能、基体红外光谱、铝合金表面形貌及元素变化,分析层合板的氙灯老化机理。结果随氙灯老化时间的延长,树脂基体老化降解程度越高,树脂与纤维、铝合金的界面强度下降,使材料拉伸及弯曲性能降低,拉伸强度受老化影响最为显著的是正交结构层合板,老化84 d后强度降低13.7%,正交结构0°方向层合板的弯曲强度受氙灯老化影响降低4.6%,其他试样的弯曲强度降幅均低于5%,氙灯老化后的铝合金层表面的微凹坑数量及尺寸无明显变化,但凹坑氧元素随老化周期延长略微增加。结论氙灯环境主要影响玻璃纤维-铝合金层合板中的复合材料层及各界面,树脂基体的降解导致力学性能的衰退,而对于铝合金的影响并不明显。

Xenon Lamp Aging Characteristics of Glass Fiber-aluminum Laminates

Objective To research xenon lamp aging characteristics of glass fiber-aluminum laminates. Methods The xenon lamp aging mechanism of glass fiber-aluminum laminates was researched by analyzing their mechanical properties, IR spectrums, morphology, and elemental changes of aluminum alloy. Results Under the condition of accelerating the xenon lamp aging, the inner matrix of the composite material would be hygroscopic and plasticized, and the interface of resin-fiber and resin-aluminum would be destroyed, which affected the internal stress transmission and the mechanical properties. After aging for 84d, the tensile strength of orthogonal structure laminates was reduced by 13.7%, which affected most by the xenon lamp aging, and the bending strength of laminate in the 0° direction of orthogonal structure was reduced by 4.6%; while that of other samples was decreased by less than 5%. There was no significant change in the number and size of micro-pits on the surface of the aluminum alloy layer, where oxygen content slightly increased with the aging cycle. Conclusion The xenon lamp environment mainly affects the composite layers and the interfaces in the glass fiber-aluminum alloy laminate. The degradation of the resin matrix leads to the deterioration of the mechanical properties, but the effect on the aluminum alloy is not obvious.