摘要
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。
Peel stress causing by secondary bending in composite-metal adhesively single lap joints will decrease strength of the joints. The effect of different ply orientation angle, different ply stacking sequence and chamfe- ring to secondary bending of bonded single lap joints is analyzed by using finite element method. The relations between secondary bending and peel stress, bending stiffness are also analyzed. It is found that the bending stiffness affects the peel stress, the bigger the bending stiffness is, the smaller the secondary bending will be, and the chamfering helps to reduce secondary bending.
出处
《航空工程进展》
2013年第2期170-174,共5页
Advances in Aeronautical Science and Engineering
关键词
复合材料
金属
单搭接
胶接
次弯曲
composite
metal
single lap joints
adhesive joints
secondary bending
