Materials Reports 2021, Vol. 35 Issue (z2): 573-578 |
POLYMERS AND POLYMER MATRIX COMPOSITES |
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Experimental Study on Quasi-static Compression of Multi-cell Structure of Hexagon Glass Fiber Reinforced Composites |
ZHANG Qi, ZHANG Zhendong, REN Jie
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Department of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China |
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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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Published: 09 December 2021
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Fund:This work was financially supported by the National Natural Science Foundation of China(1190020051). |
About author:: Qi Zhang, master student of Nanjing University of Scie-nce and Technology, enrolled in Nanjing University of Science and Technology in 2019. Jie Ren, associate professor of Nanjing University of Science and Technology, presides over the National Natural Science Foundation of China, National Defense 973 Project Special Research, Rocket Force Preliminary Research, Jiangsu Natural Science Foundation, Joint Innovation Fund of Aerospace Universities and other vertical scientific research projects, as well as several horizontal scientific research projects. Since the “Ele-venth Five-Year Plan”, as the main researcher, he has participated in more than 10 major national security basic research, national defense basic research, weapon pre-research and second artillery pre-research projects. Participated in the research and development of many weapons and aerospace systems. |
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