对碳纤维复合材料（CFRP）层合板进行了25，50 ℃加速水浴吸湿试验，以及吸湿后的单向拉伸和三点弯曲试验，研究了吸湿率、拉伸强度和弯曲强度随吸湿时间、水浴温度的变化规律，讨论了CFRP层合板的失效机理；拟合试验数据建立了CFRP层合板的剩余强度模型，并基于环境当量系数对层合板的湿热老化寿命进行预测。结果表明：CFRP层合板在50 ℃水浴温度下的平均饱和吸湿率为0.77%，高于在25 ℃下的（0.33%），在相同吸湿时间下，50 ℃水浴温度下的吸湿率大于25 ℃下的；CFRP层合板在50 ℃吸湿饱和后的拉伸强度和弯曲强度相比吸湿前的分别下降了7.4%和17.2%，下降幅度均大于25 ℃下吸湿饱和后的；水浴温度越高，CFRP层合板碳纤维与树脂间界面损伤越严重，裂缝越明显；基于剩余强度和环境当量系数的真实老化寿命预测方法可为湿热环境下CFRP层合板的服役可靠性评估提供依据。

Accelerated water bath moisture absorption tests at 25 ℃ and 50 ℃ were carried out on carbon fiber reinforced polymers (CFRP) laminates, and the uniaxial tension and three-point bending tests were performed. The rule of the moisture absorption, tensile strength and bending strength varying with the moisture absorption time and the bath temperature was studied. The failure mechanism of the CFRP laminates was discussed. A residual strength model of CFRP laminates was established by fitting the experimental data. On the basis of the environmental equivalent coefficient, the hygrothermal aging life of the laminates was predicted. The results show that the average saturation moisture absorption rate of CFRP laminates at 50 ℃ was 0.77%, and was larger than 0.33% at 25 ℃. At the same moisture absorption time, the moisture absorption rate at 50 ℃ was higher than that at 25 ℃. The tensile strength and bending strength decreased by 7.4% and 17.2% after moisture absorption saturation at 50 ℃ compared with that before moisture absorption, respectively, and the decrease degree was higher than those after moisture absorption saturation at 25 ℃. The higher the bath temperature, the more serious the interface damage between CFRP laminate carbon fiber and resin, and the more obvious the cracks. The real aging life prediction method on the basis of residual strength and environmental equivalent coefficient could provide evidence for the service reliability evaluation of CFRP laminates in hygrothermal environment.