针对承受剥离载荷的L形碳纤维增强复合材料(Carbon fiber reinforced plastic/polymer,CFRP)/铝合金胶接复合构件,以微元受力平衡方程为基础,建立胶层平均剥离应力的二维分布方程。在方程中引入基材的弯曲刚度系数,描述背材与基材均为刚性材料的情况下胶层剥离应力的分布规律。其应力分布曲线为拉压应力交替作用的阻尼调和函数,周期与峰值由胶接件构型尺寸与材料性能参数决定。通过CFRP/铝合金剥离试验及三维有限元模拟对理论模型进行对比验证,结果的总体趋势与数值吻合程度较好,并分析不同方法获得的剥离应力分布状态之间的差异及其产生的原因。基于胶接复合构件的理论模型与三维有限元模型,研究基材厚度改变对剥离应力分布的影响,发现伴随着CFRP板厚度的增加,剥离应力的峰值明显下降,在剥离前沿的应力集中现象得到改善。 Aiming at the composite member with L-shaped carbon fiber reinforced polymer (CFRP) / aluminum alloy subjected to peel load, a two-dimensional distribution equation of average peeling stress . In the equation, the bending stiffness coefficient of the substrate is introduced to describe the distribution law of the layer peeling stress in the case that the back and the substrate are both rigid materials. The stress distribution curve is the damping harmonic function of the alternate action of tension and compression stress. The period and peak are determined by the configuration size and material performance parameters of the adhesive. The theoretical model is validated by the CFRP / Al alloy peel test and the three-dimensional finite element simulation. The overall trend of the results is in good agreement with the numerical values. The differences between the peel stress distributions obtained by different methods and the causes are also analyzed. Based on the theoretical model and three-dimensional finite element model of the bonded composite component, the influence of the change of the substrate thickness on the peel stress distribution was studied. It was found that with the increase of the thickness of the CFRP board, the peel stress peak decreased significantly, improve.