Abstract
In this study, a numerical method to analyze the mechanical behaviors of woven fabric composite under off-axis loading is proposed. As the analysis is difficult with the conventional method, the relative displacement vectors are employed to load to off-axis direction of unit cell of woven fabric composite under periodic boundary conditions. The length of vectors can be calculated by the size of unit cell and loading angle. The mechanical behaviors of arbitrary in-plane off-axis loading directions can be estimated by the proposed method. FE analysis based on damage mechanics was carried out and the damage behaviors of woven fabric composites of under several loading directions were characterized. As the results, when the angle between loading direction and principal axis is larger, initial damage stress decreased. The initial damage spots and the propagations of damage development are different. The proposed method will also contribute to analyze off-axis direction of other FRP with periodic boundary conditions such as braded composites or non crimp fabric composites.
