Shear Buckling Characteristics of Aviation Fiber-reinforced Resin Matrix Composite

Shear experiments were performed on fiber-reinforced resin matrix composite stiffened panels, and the failure pattern and buckling characteristics of stiffened panel were studied via strain-shear stress curves. The results show that the failure modes of stiffened panels mainly were the debonding and cracking of stiffener and tearing of skin. After skin was local buckling, the stiffened panel still had larger post-buckling carrying capacity, and the failure load of the stiffened panel was about 4.5 times higher than that of the buckling load.