采用中性盐雾条件模拟海洋大气环境进行加速老化试验,评价玻璃纤维增强环氧改性酚醛树脂基复合材料(GFRP)在海洋气候中的耐久性.通过该复合材料经盐雾老化后的质量变化和纵向拉伸强度、横向拉伸强度、压缩强度、层间剪切强度的变化,结合湿热老化机理,研究其老化规律.结果表明,随着老化时间的增加,复合材料的吸湿量增加,力学强度下降,压缩和层间剪切曲线表现出塑性特征.吸湿最初阶段对力学性能影响最大,纵向拉伸强度、横向拉伸强度、压缩强度、层间剪切强度分别下降到56.1%、54.7%、54.0%、61.0%.其中拉伸强度变化趋势最稳定,更适用于评价该复合材料的老化程度.
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