复合材料加筋结构界面层间应力分析建模

Modeling and Analysis of Interlaminar Stress of Stiffened Structures of Composites

通过采用将复合材料加筋结构在界面附近按照单层、在界面附近以外的区域处理为均质各向异性材料,建立了一种复合材料加筋结构界面层间应力分析的新模型。采用该模型大大减少了加筋结构分析时需要的单元数目,同时又能得出界面上的层间应力。算例表明这种建模方法是切实可行的。算例揭示出了界面上层间应力的分布规律,得出了一些重要结论。

A new 3-D finite element model is established for interlaminar stress of stiffened structures of composites,through the interface region of the composite is treated as a lamina and outside of this region is treated as a homogeneous orthotropic material.It not only obtains interlaminar stress,but also can enormously reduce the number of finite elements and nodes.The example indicates the mode is correct and convenient for analysis.Also several important rules and conclusions are revealed for interlaminar stress of stiffened structures of composites.