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本文提出了基于连续损伤力学的复合材料层合加筋壁板渐进损伤分析模型。该模型采用界面单元模拟筋条和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,基于内嵌连续损伤状态变量的材料刚度退化方案,采用非线性有限元方法,研究了复合材料加筋壁板在压缩载荷下的破坏过程,分析了结构相应失效模式的细观失效机理。数值分析结果与实验数据吻合较好,证明该方法的合理性和有效性,并详细探讨了界面单元关键参数和层板铺设角度对加筋壁板结构力学响应的影响规律,得到了一些富有价值的结论。
In this paper, a progressive damage analysis model of composite laminated stiffened panels based on continuous damage mechanics is proposed. In this model, interface elements are used to simulate the connection interface between ribs and siding. The interface and composite laminate are respectively subjected to Quads criterion and Hashin criterion as failure criteria. Based on the material stiffness degradation scheme with continuous damage state variables, The nonlinear finite element method is used to study the failure process of composite stiffened wall under compressive load. The mechanism of meso-failure of corresponding failure modes is analyzed. The results of numerical analysis are in good agreement with the experimental data, and the rationality and validity of the method are proved. The influence of the key parameters of interface unit and the angle of laying of laminates on the mechanics response of stiffened panel is discussed in detail. Some valuable Conclusion.