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该文采用有限元软件ANSYS,建立了复合材料单螺栓双剪搭接干涉配合的三维有限元模型,研究了当连接模型中施加了预紧力时,预紧力对干涉配合的影响。首先分析了无载荷作用下复合材料板在干涉配合孔边切向应力分布特点;之后比较了双剪搭接在10kN和15kN两种远程纵向载荷作用下,孔边切向应力的分布情况。结果表明:远程纵向循环载荷作用下,预紧力能有效均匀各板所受载荷,并可消除在无预紧力时中板上的局部应力集中点,而且适当增大预紧力能提高干涉配合连接的效率;此外研究显示双剪搭接连接在不同的载荷下,疲劳危险点也不同;最后研究了复合材料干涉配合连接时,各板的交叉区域孔边切向应力分布,因此得出各板在高低不同的载荷下疲劳危险点的分布。
In this paper, the finite element software ANSYS is used to establish the three-dimensional finite element model of interference fit of single-bolt and double-shear lap joint. The influence of pre-tightening force on the interference fit is investigated when the pre-tightening force is applied in the connection model. Firstly, the stress distribution characteristics of the composite plate under the no load were analyzed. The distribution of the tangential stress at the hole edge under the two kinds of longitudinal longitudinal loads of 10kN and 15kN was compared. The results show that under long-range longitudinal cyclic loading, the pre-tightening force can effectively uniform the load on each plate and eliminate the local stress concentration point on the middle plate without pre-tightening force, and the pre-tightening force can increase the interference In addition, the study shows that the double shear lap joint under different loads, the risk of fatigue at different points; Finally, the composite material interference fit connection, the intersection of the plate hole cross-section tangential stress distribution, draw The distribution of the dangerous points of fatigue of the boards under different loads.