复合材料与金属胶接结构的次弯曲效应研究

复合材料与金属胶接单搭接的次弯曲效应引起的剥离应力，会大大降低接头的强度。采用有限元方法分析复合材料铺向角、铺层顺序及斜削对次弯曲的影响，并进一步研究分析次弯曲和胶层剥离应力、板的弯曲刚度之间的关系。结果表明：次弯曲影响剥离应力的大小；弯曲刚度越大，次弯曲越小；斜削有助于减小次弯曲。

The Secondary Bending of Composite-Metal Adhesively Bonded Joints

Peel stress causing by secondary bending in composite-metal adhesively single lap joints will decrease strength of the joints. In this article it analyzes the effect of different ply orientation angle, different ply stacking sequence and chamfering to secondary bending of bonded single lap joints with finite element method. It also analyzes the relation between secondary bending and peel stress, bending stiffness. It discovers that the bending stiffness affects the peel stress; the bigger bending stiffness is, the smaller secondary bending is; the chamfering helps to reduce secondary bending.