Out-of-plane Quasi-static Compression Test of a Regular Hexagonal Glass Fiber Multi-cell Structure
ZHANG Qi1, ZHANG Zhendong1,*, REN Jie1, YAO Lin2, WU Linhua1
1 School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China 2 Nanjing Institute of Analog Technology, Nanjing 210094, China
Abstract: In this work, several regular hexagonal glass fiber multi-cell structures were proposed. The multi-cell structure specimens were prepared by hot pressing mold technology, and the universal testing machine was used to conduct an out-of-plane quasi-static compression test to analyze the failure mode and energy absorption characteristics of multi-cell structures with different wall thicknesses. The test results show that in the process of quasi-static compression, when the wall thickness of the multi-cell structure is small, it appears as a local buckling failure mode, and when the wall thickness is ≥ 0.8 mm, it appears as a progressive failure mode; compared with the relative average compressive load, the actual average compressive load of the multi-cell structure specimens with five wall thicknesses is significantly improved, and the actual average compressive load increases with the increase of the number of cells and the cell wall thickness; the specific energy absorption increases with the increase of the cell wall thickness, and when the cell wall thickness increases from 0.6 mm to 0.8 mm, the multicellular structure changes from a local buckling failure mode to a progressive failure mode, and the specific energy absorption is significantly increased, which can increase 5.62—9.74 J/g.
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2023, Vol. 37 
