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建立了复合材料加筋板在轴压载荷作用下的屈曲和后屈曲分析有限元模型,模型中复合材料采用壳单元结合Hashin失效准则进行分析,筋条与蒙皮之间的胶层采用ABAQUS软件中的粘接元结合二次名义应力失效准则进行模拟,采用risk算法进行后屈曲承载能力分析。同时,文中加筋板的轴压后屈曲分析考虑了筋条和蒙皮之间存在脱胶缺陷的影响,并结合载荷——位移曲线的试验数据验证了本文模型的有效性。该模型可用于复合材料加筋板后屈曲承载能力分析,为结构优化和减轻结构重量提供理论参考。
The finite element model of buckling and post-buckling of composite stiffened plate subjected to axial compressive load is established. The composite material is analyzed by shell element combined with Hashin failure criterion. The glue layer between ribs and skins is simulated by ABAQUS software In the bond element combined with the second nominal stress failure criterion for simulation, using the risk algorithm for post-buckling bearing capacity analysis. At the same time, the buckling analysis of the stiffened plate considering the influence of the degumming defects between the rib and the skins, and the test data of the load-displacement curve verify the validity of the model. The model can be used to analyze the post-buckling bearing capacity of composite stiffened plates and provide a theoretical reference for structural optimization and structural weight reduction.