| 碳纤维增强环氧树脂复合材料圆管多胞填充结构吸能特性的准静态压缩试验 |
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| 引用本文： | 王雪琴,张震东,马大为,高原,王玺,王尚龙,米莹娟. 碳纤维增强环氧树脂复合材料圆管多胞填充结构吸能特性的准静态压缩试验[J]. 复合材料学报, 2021, 38(9): 2894-2903. DOI: 10.13801/j.cnki.fhclxb.20201201.003 |
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| 作者姓名： | 王雪琴 张震东 马大为 高原 王玺 王尚龙 米莹娟 |
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| 作者单位： | 南京理工大学 机械工程学院,南京210094;火箭军研究院,北京100089;北京航天发射技术研究所,北京100076;陆军研究院工程设计研究所,南京210016;南京昌理机电科技有限公司,南京210016 |
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| 基金项目： | 国家自然科学基金(11902160) |
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| 摘 要： | 针对现有研究对复合材料多胞结构吸能特性研究的不足，提出了一种由多根小尺寸的单根碳纤维增强环氧树脂复合材料圆管(Single CFRP tube，SCT)填充进大尺寸碳管组成的多胞填充结构(Multicellular filling structure，MFS)，并分别对SCT和MFS进行了单次全行程加载和多次分段加载的准静态压缩，分析了其压缩破坏模式和吸能特性。研究结果表明:MFS最外侧碳管破坏模式与SCT破坏形式相似，且单次全行程压缩与多次分段压缩的破坏模式没有明显区别，但MFS最外侧碳管由于内部碳管及碎屑的挤压呈现出明显的径向变形；相对于单次全行程压缩过程，SCT及MFS多次分段压缩时的总耗能量更多；本次研究的SCT试件最大比吸能为86.0 J/g，最小比吸能为59.3 J/g，然而由于MFS最外侧管件的比吸能低，导致其比吸能在69.8~75.9 J/g之间，小于单管根碳管的最大比吸能，但进一步研究可知，合适的外部约束形式和内部碳管数量可使MFS比吸能高于SCT的最大比吸能。
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| 关 键 词： | CFRP 轴向压缩 复合材料 能量吸收 破坏模式 |
| 收稿时间： | 2020-09-30 |
Quasi-static compression experimental study on energy absorption characteristics of multicellular structures filled with carbon fiber reinforced epoxy composite tubes |
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| Affiliation: | 1.School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China2.Rocket Army Academy, Beijing 100089, China3.Beijing Institute of Space Launching Technology, Beijing 100076, China4.Engineering Design Institute of the Army Research Institute, Nanjing 210016, China5.Nanjing Changli Electromechanical Technology Co. Ltd., Nanjing 210016, China |
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| Abstract: | In view of the deficiency of the existing research on the energy absorption characteristics of composite multi-cell structures, a kind of multicellular filling structure (MFS) was proposed, which was filled by some single small-size CFRP tubes (SCT) into large-size CFRP tubes. The quasi-static compression tests of SCT and MFS were carried out, which included full stroke compression and multi-staged compression, then the failure mode and energy absorption characteristics were analyzed. The results show that the failure mode of the outermost CFRP tube of MFS is similar to SCTs, and there is no obvious difference between full stroke compression and multi-staged compression, but the radial deformation of the outermost tube is obvious due to the compression of the inner tube and debris. Compared with the full stroke compression process, the total energy absorption of SCT and MFS is more when they are multi-staged compressed. In this study, the maximum specific energy absorption (SEA) of SCT is 86.0 J/g and the minimum SEA is 59.3 J/g. While, due to the low SEA of the outermost tube of filled structures, the SEA of the MFS is between 69.8 J/g and 75.9 J/g, which is less than the maximum SEA of SCT. The SEA of the MFS is higher than that of SCT with appropriate external constraint and internal carbon tube number by further research. |
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