玻璃纤维/环氧乙烯基酯树脂复合材料环境综合因素下的冲蚀行为及机制

对风电工程中采用的玻璃纤维/环氧乙烯基酯树脂（GF/EVE）复合材料进行碱-紫外循环加速老化试验，通过分析不同循环老化周期下GF/EVE复合材料吸湿率、微观形貌、表面元素含量、树脂初始分解温度及冲蚀失重率的变化，探讨了GF/EVE复合材料碱-紫外循环老化机制和不同循环老化周期下抗冲蚀性能的变化。结果表明:在水分子的扩散、水解反应和光氧老化的共同作用下，GF/EVE复合材料表层树脂发生老化降解、纤维与树脂基体界面出现脱黏、纤维发生腐蚀分解；同时循环老化造成树脂分子链断裂，树脂交联密度下降，导致树脂初始分解温度下降；在第1个老化周期内GF/EVE复合材料冲蚀失重率下降了2.06%，老化结束时冲蚀失重率增加了32.8%。 

Erosion behavior and mechanism of glass fiber/epoxy vinlester composites under multiple environmental factors

The accelerated aging tests of alkali-ultraviolet circulation of glass fiber/epoxy vinlester (GF/EVE) composites used in wind power project were carried out. The change of moisture absorption rate, micro morphology, surface element content, initial decomposition temperature and erosion mass loss rate of the CF/EVE composite samples were investigated to reveal the aging mechanism of GF/EVE composites in alkali-ultraviolet circulation aging and the change of erosion resistance of GF/EVE composites under different cyclic aging cycles. The results show that the coaction of photo-oxidative, hydrolysis reaction and water diffusion causes the surface resin of the GF/EVE composites aging degradation and fiber decomposition and also causes fiber and resin matrix to debond. The breakdown of resin molecular chain and the decrease of resin crosslinking density cause the decline of initial decomposition temperature of resin under circulation aging. The erosion mass loss rate decreases by 2.06% at the first aging cycle and the erosion mass loss rate increases by 32.8% at the end of aging.