关键词: 蜂窝夹芯结构, 芳纶纸蜂窝, 有限元分析, 固化过程, 蜂窝边缘塌陷, 复合材料

Abstract: To investigate the issue of lateral deformation and sliding of large thickness Nomex honeycomb in curing process, a fine-structure honeycomb finite element model was established and calculated, and the calculation results were compared with technological test results. The flatwise compression specimens of honeycomb were modeled first, and the calculation results indicated that the loading response is consistent with the experiment with a small error. It can prove the great accuracy of using 2D shell element to model the honeycomb cells. On this basis, a finite element model of the honeycomb forming technological specimens was established. After calculation, the local mechanical response of the honeycomb core in curing process was obtained and the transition from buckling of cells to sliding of specimens’ edges can be simulated. Compared with the technological test results, the deformation trend of honeycomb is basically consistent. Therefore, the fine-structure simulation model can provide a reference for technological test and the selection of honeycomb stabilization methods.

Key words: honeycomb sandwich, Nomex honeycomb, finite element analysis (FEA), curing process, honeycomb edge depression, composites