为评估先进复合材料在湿热环境下长期服役性能,根据Fick第二定律和C.Grave研究结果,建立了树脂基复合材料热水老化扩散控制阶段的吸水率-时间-温度三者间的理论模型(1);在56、66、76、96℃热水中,测定了单束玻璃纤维增强环氧树脂基复合材料的吸水率,确定了理论模型中的参数,建立一个可预测吸水率的计算式(2);在实验结果的基础上,对式(1)进行了修正,提出了一个真正意义上的吸水率-时间t-温度三者关系模型(3),并对单束玻璃纤维增强环氧树脂基复合材料的吸水率进行了拟合评估。 In order to evaluate the long-term serviceability of advanced composites under hot and humid conditions, the theoretical model of the water absorption-time-temperature relationship of the resin-based composites during hot water aging diffusion control was established according to the second law of Fick and the result of C. Grave (1); in 56, 66, 76, 96 ℃ hot water, the water absorption of single glass fiber reinforced epoxy resin matrix composites was measured, the parameters in the theoretical model were determined, and a predictable water absorption calculation On the basis of the experimental results, the formula (1) is modified and a real water absorption-time t-temperature relationship model (3) is proposed. The single fiber glass fiber reinforced The water absorption of epoxy matrix composites was evaluated by fitting.