| 摘要: |
| 为简化制作工艺，将碳纤维增强环氧树脂复合材料（CFRP）六边形管采用环氧树脂胶粘接在一起形成碳纤维增强环氧树脂复合材料六边形管多胞结构（Multicellular structure of CFRP hexagonal tubes，MSCHT）。通过对多胞结构进行准静态压缩试验，分析了其压缩破坏模式和耗能特性，并获取了各影响因素对压缩响应的贡献率。研究结果表明：多胞结构均呈现出渐进压缩破坏模式，沿着六边形管自由面形成带状纤维束；相邻碳管间的相互作用和粘接面的存在导致多胞结构的实际平均载荷高于其比测值，进而使得实际耗能量高于耗能量比测值；与单根六边形碳管相比，MSCHT的比吸能更高，并且存在最优壁厚使得结构比吸能最大，本次试验试件的最大比吸能达到114.4 kJ/kg；多胞结构的胞元数量和壁厚对平均压缩载荷、峰值载荷、耗能量的线性贡献率均为正且胞元数量贡献率高于壁厚，而壁厚对比吸能的线性贡献率为负，胞元数量对比吸能的贡献率为正。 |
| 关键词: 碳纤维六边形管 多胞结构 准静态压缩试验 破坏模式 吸能特性 贡献率分析 |
| DOI：10.13675/j.cnki.tjjs.2203006 |
| 分类号:V46;TB332 |
| 基金项目:国家自然科学基金（11902160）。 |
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| Experimental Research on Quasi-Static Compression Response of Multi-Cellular Structures with Carbon Fiber Reinforced Epoxy Composite Hexagonal Tubes |
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ZHANG Zhen-dong1, REN Jie1, MA Da-wei1, GAO Yuan2, ZHU Zhong-ling1, WANG Xi3
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1.School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;2.Rocket Army Academy,Beijing 100089,China;3.Beijing Institute of Space Launching Technology,Beijing 100076,China
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| Abstract: |
| In order to simplify the manufacturing process， carbon fiber reinforced epoxy resin composite （CFRP） hexagonal tubes were bonded together with epoxy resin adhesive to form multicellular structures with CFRP hexagonal tubes （MSCHT）. Quasi static compression tests were carried out to analyze compression failure mode and energy dissipation characteristics of MSCHT， then contribution rate of each influencing factors to the compression response are obtained. The results show that： the MSCHT in this paper presents progressive compression failure， and the ribbon fiber bundles are formed along the free surface of hexagonal tubes. Due to the interaction between adjacent carbon tubes and the existence of bonding surface， the actual average load of MSCHT is higher than the comparative measuring value and causes the actual energy absorption （EA） higher than the comparative measuring energy absorption. Therefore， compared with a single CFRP tube， the specific energy absorption （SEA） of MSCHT is higher and existing an optimum wall thickness caused the maximum SEA. The maximum SEA of the test specimen is 114.4kJ/kg. The linear contribution rate of cell number and tube thickness to average compressive load， peak load and EA is positive， and the cell number contribution rate of MSCHT is higher than tube thickness， while the linear contribution rate of tube thickness to EA is negative and the contribution rate of cell number is positive. |
| Key words: CFRP hexagonal tube Multi-cell structure Quasi-static compression test Failure mode Energy absorption characteristics Analysis of contribution rate |
