| Citation: | YU Jian, HE Yuting, FENG Yu, et al. Moisture absorption behavior of epoxy resin matrix composite stiffened panel[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(9): 1908-1917. doi: 10.13700/j.bh.1001-5965.2020.0532(in Chinese)
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The properties of epoxy resin matrix composites are sensitive to hygrothermal environment, and it is of great significance to investigate the moisture absorption behavior of epoxy resin matrix composite structures for its practical application. Based on the non-Fickian moisture absorption model of carbon fiber epoxy resin matrix laminates, the non-Fickian moisture absorption model for the epoxy resin matrix stiffened panel was established, the moisture absorption experiments of stiffened panel were conducted under the condition of 70℃/85% RH, and the established model was verified. The proposed model was compared with the existing moisture absorption model further. Finally, the moisture absorption distribution of the typical stiffened panel along the thickness direction was given through the established model. The results show that the calculated results of the established non-Fickian moisture absorption model of the stiffened panel are in good agreement with the experimental results. The relative error of the moisture absorption through the entire moisture absorption stage is less than 5%, and the predictive accuracy of the model is higher than that of the traditional Fick model. The established non-Fickian moisture absorption model of stiffened panel can be used to accurately predict the absorbed moisture content of epoxy resin matrix composite stiffened panels.
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