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建立了考虑脱粘的复合材料整体加筋板渐进损伤有限元分析模型。该模型采用界面单元模拟筋条与壁板之间的连接界面,连接界面和复合材料层板分别采用Quads准则和Hashin准则作为失效判据,基于ABAQUS软件,建立了含连续损伤状态变量的材料刚度退化方案。基于该模型,采用非线性有限元方法研究了压缩载荷下复合材料整体加筋壁板在考虑初始几何缺陷时的破坏过程,分析了结构相应失效模式的细观损伤机制;详细讨论了轴向刚度比对结构承载能力及破坏模式的影响。结果表明:考虑脱粘损伤的有限元模型能有效模拟加筋板的破坏过程;在加筋板铺层设计合理的情况下,增加筋条与壁板刚度比能有效提高加筋板截面单位面积的承载能力。
A finite element analysis model of asymptotic damage of composite stiffened plates considering debonding was established. In this model, interface elements are used to simulate the connection interface between ribs and wall panels. Quads criterion and Hashin criterion are used as failure criteria respectively for the interface and the composite laminate. Based on the ABAQUS software, the material stiffness with continuous damage state variables is established Degradation program. Based on this model, the failure process of composite reinforced stiffened panels under initial compressive loads was investigated by using the nonlinear finite element method. The meso-damage mechanism of corresponding failure modes was analyzed. The effects of axial stiffness Comparison of structural load carrying capacity and failure modes. The results show that the finite element model considering the debonding damage can effectively simulate the failure process of stiffened plate. When the stiffened plate design is reasonable, increasing the stiffener ratio of stiffener to the wall can effectively increase the unit area of the stiffened plate Carrying capacity.