蜂巢
材料科学
声发射
弯曲
壳体(结构)
复合材料
失效模式及影响分析
蜂窝结构
夹层结构复合材料
结构工程
三点弯曲试验
芯(光纤)
工程类
作者
Zhibin Li,Ying Gao,Yan Wang,Pengcheng Xue,Cheng Gong,Wenyu Wang,Xingyu Wei,Jian Xiong
标识
DOI:10.1016/j.compscitech.2023.110003
摘要
The winding-based method is used for fabricating all carbon fiber reinforced plastic (CFRP) cylindrical honeycomb sandwich shell. The theoretical model of multi-failure modes of the cylindrical honeycomb sandwich shell is established under three-point bending. The multiple failure mechanisms of the honeycomb sandwich shell under three-point bending are revealed by the established three-dimensional failure mechanism map. The theoretical prediction of multi-failure modes is verified by experiments and finite element method. The acoustic emission (AE) technology is implemented to detect the evolution rule of internal damage of honeycomb sandwich shell. The damage patterns of the acoustic emission signals with different failure modes are identified by the unsupervised k-means clustering algorithm. The meso-damage mechanisms are also disclosed by the digital microscope. It was found that high peak frequency of the AE signals represents the face-core debonding failure. Finally, the optimal geometric design of the honeycomb sandwich shell under the bending load was carried out. The damage characteristics from mesoscale damage to macroscale failure provide a crucial foundation for discriminating multiple damage failure modes of structures.
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