分析了复合材料湿热和热氧老化机理,对层合板复合材料及夹芯复合材料进行交变湿热和高低温加速环境试验,研究了材料的质量、弯曲性能等随老化环境、老化时间的变化情况。结果表明,复合材料具有良好的耐湿热和高低温环境稳定性,夹芯复合材料较层合板复合材料表现为更佳的性能稳定性。 The aging and damp-heat mechanisms of composites were analyzed. The experiments of alternating hot and humid and high-low temperature accelerated tests on laminated composites and sandwich composites were carried out. The changes of the quality and the flexural properties of composites with aging and aging time were studied . The results show that the composites have good resistance to moist heat and high and low temperature environmental stability, and the sandwich composites show better performance stability than the laminate composites.