玻璃纤维-铝合金层合板湿热老化性能研究

通过研究玻璃纤维-铝合金层板在70℃、RH85%湿热环境下不同老化周期后的力学性能、基体红外光谱、铝合金表面形貌及元素变化,分析了层板的湿热老化机理。结果表明:在加速湿热老化条件下,复合材料层内部基体会发生吸湿塑化,并破坏树脂与纤维以及铝合金层的界面,影响了材料内部应力的传递,使与界面及桥接应力相关的性能发生明显退化;表层铝合金层随湿热老化时间的延长,表面氧化加剧,使铝合金塑性降低,主要影响依靠铝合金承载的力学性能。

INVESTIGATION OF HYDROTHERMAL AGING MECHANICAL PROPERTIES OF GLASS FIBER-ALUMINUM LAMINATE

The mechanism of hydrothermal aging of glass fiber-aluminum laminate was studied by analyzing their mechanical properties,IR spectra,morphology and elemental changes of aluminum alloy,as well as the hydrothermal aging include different aging cycles at 70 ℃C and 85％.The results show that under the condition of accelerating the hydrothermal aging,the inner matrix of the composite material will be hygroscopic and plasticized,and destroy the interface of resin-fiber and resin-aluminum,which will affect the internal stress transmission and the mechanical properties related to the interface and bridge stress.The aluminum alloys are oxidized with hydrothermal aging time,so that the plasticity of aluminum decreased,and the mechanical properties of the laminate are affected.