基于多尺度方法的蜂窝夹层复合材料结构轴向压缩稳定性

Stability of honeycomb sandwich composite structure under axial compression based on multi-scale method

为有效预测蜂窝夹层复合材料结构压缩失稳载荷和破坏模式,本文基于层压板宏细观多尺度数值分析模型,研究蜂窝夹层复合材料结构在轴向压缩载荷下的屈曲稳定性。基于改进的通用单胞理论模型,并结合ABAQUS用户自定义子程序接口,建立蜂窝夹层复合材料结构宏细观数值模型,预报蜂窝夹层复合材料结构失效载荷和破坏模式,并与试验结果对照,验证了模型的有效性。结果表明:通过本文建立的数值模型可以有效预测蜂窝夹层复合材料结构在压缩载荷下的失稳载荷和破坏模式,其一阶失稳载荷为128.12 kN,与试验结果误差为4.58%,蜂窝夹层复合材料结构破坏模式为先发生屈曲失稳,然后迅速破坏。

To effectively predict the compressive instability load and failure mode of honeycomb sandwich composite structure,the buckling stability of the honeycomb sandwich composite structure under axial compressive loads based on the multi-scale numerical analysis model was studied.The macro-micro multiscale model of the honeycomb sandwich composite structure was established using the improved general cell model and the ABAQUS user-defined subroutine interface.The compressive instability load of the honeycomb sandwich composite structure was predicted and compared with the experimental results.The results show that the numerical model established in this paper can effectively predict the buckling load and failure mode of the honeycomb sandwich composite structure under compression load.The predicted first-order buckling load of the structure is 128.12 kN,which have an error of 4.58%compared with the experimental result.The failure modes of the sandwich structure are first buckling instability and then rapid failure.