航空用纤维增强树脂基复合材料加筋板的剪切屈曲特性

Shear Buckling Characteristics of Aviation Fiber-reinforced Resin Matrix Composite

摘要: 对纤维增强树脂基复合材料加筋板进行了剪切试验, 结合应变-剪切力曲线对加筋板的破坏形式以及屈曲特性进行了研究。结果表明: 加筋板的破坏形式主要表现为筋条脱胶、断裂和蒙皮撕裂; 蒙皮达到局部屈曲后, 加筋板仍具有较大的后屈曲承载能力, 其破坏载荷约为屈曲载荷的4.5倍。

Abstract: 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.