采用时温等效法预测风轮叶片用EP结构胶的长期蠕变性能

Long-term creep property of EP structural adhesive for wind turbine blade predictedby time-temperature equivalence method

应用时温等效原理预测了两种风轮叶片用玻纤增强EP(环氧树脂)结构胶的长期蠕变性能,通过对比时温叠加主曲线与为期2 d的实际蠕变曲线,验证了时温等效原理在风轮叶片用EP结构胶中使用的有效性。研究结果表明:利用时温等效原理推导得到的主曲线,可大概预测EP结构胶的长期蠕变性能;对比了改性EP结构胶A和普通市售EP结构胶B的蠕变性能,发现改性产品具有相对更好的长期抗蠕变性能(尤其是在高温和高应力环境中时)。

The long-term creep properties of two types glass fiber reinforced EP （epoxy resin） structural adhesives for wind turbine blade were predicted by time-temperature equivalence principle, and the effectiveness of time-temperature equivalence principle, which was used in EP structural adhesive for wind turbine blade, was verified by contrast between the time-temperature superposition principal curve and 2 d actual creep curve. The research results showed that the long-term creep property of EP structural adhesive could be roughly predicted by principal curve, which was derived by time-temperature equivalence principle. The modified product had the relatively better long-term creep resistance （especially in a high-temperature and high stress environment） by comparing creep properties between the modified EP structural adhesive A and ordinary commercial EP structure adhesive B.