Abstract: In this paper, the multi-cell structure of the regular hexagonal glass fiber reinforced composite material was used as the research object. The quasi-static compression test was carried out on the regular hexagonal glass fiber multi-cell structure tube with two wall thicknesses, and the failure mode and energy absorption of the multi-cell structure tube were analyzed. The results show that during the quasi-static compression process, both the multi-cell structure and thesingle cell tube show a progressive failure mode. The single cell tube produces interlayer cracks in the middle of the wall thickness. The outer layer curls and expands outward, and the inner layer curls and expands inward and squeezes each other to form blocky debris that accumulates in the tube hole. The non-adhesive surface of the multicellular structure tube is layered in the middle of the cell wall thickness, and the bonding surface has different degrees of debonding, and curling to both sides of the bonding surface. After the adjacent surfaces of the bonding surface are layered, the outer layer curls and expands outwards and squeezes each other to twist at a certain angle; the number of cells in the multicellular structure and the cell wall thickness have a significant effect on the compression performance and energy absorption characteristics of the specimen. During the compression process of multi-cell structures with different thicknesses, the actual average load of several multi-cell structures increases by 35.7% to 77.5% compared with the relative average load; the specific energy absorption of the multicellular structure is positively correlated with the cell wall thickness, and has no obvious correlation with the number of cells. In this experiment, the minimum specific energy absorption is 42.5 J/g, and the maximum specific energy absorption is 70.9 J/g.
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2021, Vol. 35 
