BA9916-Ⅱ/CCF300 Composite Stiffened Plate Hygroscopic Characteristics

Abstract

In order to study the moisture absorption characteristics of BA9916-Ⅱ/CCF300 composite stiffeners, Carrying out the moisture absorption experiment in 70℃/85%RH hot and humid environment. Fick moisture absorption model Mt=???63???vi[GiM∞i+M0i(1-Gi)] based on thethickness partition is put forward.The mass diffusion model is used for moisture absorption behavior of the finite element simulation.The result show that: Moisture absorption model is put forward based on the thickness of fick moisture absorption model can better describe the moisture absorption behavior of the structure of the type,the analysis is of the high precision; But as a result of composite stiffened plate's staging phenomenon of moisture absorption. There is a certain deviation of Fick moisture absorption model on the structure hygroscopic behavior later described;The Hygroscopic power curve and water concentration distribution results of the finite element simulation is verified the rationality of the hygroscopic model based on thickness division,better expressing the real process of moisture absorption and moisture distribution.

Keywords

• carbon fiber resin-based composite stiffened panel
• improved Fick's law
• hygrothermal behavior
• water concentration analysis
• moisture rate