【作者】 熊婕； 郭盼盼； 王波； 张宇； 黄峰；

【Author】 Xiong Jie;Guo Panpan;Wang Bo;Zhang Yu;Huang Feng;School of Aeronautics, Northwestern Polytechnical University;AVIC Manufacturing Technology Institute Composite Technology Centre;

【机构】 西北工业大学航空学院； 中国航空制造技术研究院复合材料技术中心；

【摘要】 复合材料在使用过程中不可避免地受到湿热的作用,湿与热是引起复合材料老化的最重要因素。本文通过高低温交变湿热试验,研究复合材料层合板的吸湿特性,对比分析单向板和织物板经不同湿热时间处理后的质量增重率和弯曲性能变化情况。结果表明,单向板和织物板的质量变化率随时间的增加而增加,其中织物板由于纤维结构不同导致的树脂含量与缺陷的增加使得织物板在相同的吸湿时间下质量增重率略高于单向板。单向板和织物板的弯曲性能随着吸湿时间的增加未呈现出稳定增长或下降的趋势,这是由于吸湿塑化和高温后固化的作用使其存在不同程度的波动。织物板在吸湿周期中,弯曲强度和模量的变化率均在0.2%以内,吸湿对其弯曲性能的影响较小。织物板在湿热环境中的弯曲性能比单向板更稳定。更多还原

【Abstract】 Composites are inevitably subjected to moisture and heat in the process of use, and hygrothermal condition are the most important factors causing aging of composites. In this paper, the moisture absorption characteristics of composite laminates are studied by high and low temperature alternating heat and humidity tests,and the changes of mass weight gain rate and flexural properties of uni-weave and woven composites are compared and analyzed after different heat and humidity time treatments. The results show that the mass change rate of uni-weave and woven composites increases with time. The increase of resin content and defects of woven due to different fiber structure makes the mass gain rate of woven slightly higher than that of uni-weave at the same moisture absorption time. The flexural properties of uni-weave and woven composites do not show a stable growth or decline trend with the increase of moisture absorption time, due to the role of moisture absorption plasticization and high temperature post-curing so that there are different degrees of fluctuations. During the moisture absorption period, the change rate of the flexural strength and modulus of the woven composites is within 0.2%, and the moisture absorption has little effect on its flexural performance. The flexural properties of woven composites are more stable than those of uni-weave composites in hygrothermal condition.更多还原