This paper mainly focus on the moisture absorption property of 2 different layers UD[0]8 and QI[90/0/45]S CFRP at 80 ℃ and 90%RH moisture environment by using the experimental and numerical simulation methods, the test results show that the moisture diffusion of CFRP composites following the Fick's law, and through the analysis model can simply identify the moisture diffusion coefficient D and the moisture saturation M ∞, by using these parameters and specimen geometry datas, establishing a FEM model and run-ning the numerical simulations, the numerical simulations results show clearly the moisture distributions in the specimen and the diffusion process of moisture, and this research can probably provide some engineering application supports and the experimental data basis for designing of civil aircraft composites structures.%采取实验结合数值仿真的方法,对两种不同铺层的碳纤维复合材料(CFRP)UD[0]8和QI[90/0/45]S在80℃中温和90%相对湿度(RH)环境下的吸湿特性进行了分析研究.结果表明,CFRP的吸湿特性服从水分扩散的Fick定律,利用Fick定律可以有效地确定CFRP的水分扩散系数D和饱和质量分数M∞,通过实验测定的参数,建立有限元仿真模型并进行数值仿真,仿真结果可以很好的模拟水份在试件内部的扩散过程和分布规律.这一研究结果可以为飞机结构设计和工程应用提供理论基础和实验数据支持.
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