碳纳米管树脂复合薄膜的抗横向高速冲击行为  

Transverse high-speed impact resistance of carbon nanotube resin composite films

作　　者：李周仪 刘浩然 任腾飞 刘骁骁 王弘起 LI Zhouyi;LIU Haoran;REN Tengfei;LIU Xiaoxiao;WANG Hongqi(School of Civil Engineering,Xi'an University of Technology,Xi'an 710048,China;School of Aeronautics,Northwestern Polytechnical University,Xi'an 710072,China;Shaaxi Jiangong(Yan'an)New Building Materials CO.,LTD.Yan'an 716000,China)

机构地区：[1]西安理工大学土木建筑工程学院,西安710048 [2]西北工业大学航空学院,西安710072 [3]陕西建工(延安)新型建材有限公司,延安716000

出　　处：《航空学报》2024年第22期296-310,共15页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(12302485);陕西省教育厅一般专项科研计划项目(自然科学项目)(23JK0569)。

摘　　要：本文利用一级轻气炮实验,研究了碳纳米管(CNT)薄膜抵抗横向高速冲击的性能以及树脂含量对冲击性能的影响规律;结合数值仿真手段,获得了在直径为3mm的钢球的冲击作用下纯CNT薄膜以及浸渍了20%、50%、80%浓度的环氧树脂溶液的CNT薄膜的临界穿透速度,分别为26.2m/s、27.1m/s、27.96m/s和35.3m/s。结果表明环氧树脂可以提升CNT薄膜的抗冲击力学性能,且随着环氧树脂浓度的提高,提升效果逐渐明显。通过微观形貌观测发现,CNT树脂复合薄膜在高速冲击下,其增强机制主要以微裂纹吸能为主。本研究通过研究CNT树脂复合薄膜在高速冲击下的力学行为,揭示CNT在横向冲击载荷下的增强机制,旨在对层间增韧复合材料的设计、制备及其力学性能研究提供帮助和指导。This study investigates the performance of Carbon NanoTube(CNT)films against transverse high-speed impacts and the effect of resin content on the impact performance using a one-stage light air gun experiment.Combining numerical simulations,we obtain the critical penetration velocities of pure CNT films and those impregnated with 20%,50%and 80%epoxy resin solution under the impact of a steel ball with a diameter of 3 mm,which are 26.2 m/s,27.1 m/s,27.96 m/s,and 35.3 m/s,respectively.The results show that the epoxy resin can enhance the mechanical properties of CNT films,and the enhancement effect gradually grows with the increase of epoxy resin concentration.Through the observation of microscopic morphology,we discover that the enhancement mechanism of the CNT resin composite film under high-speed impact is mainly based on the energy absorption of microcracks.By investigating into the mechanical behaviour of CNT resin composite films under high-speed impact to reveal the enhancement mechanism of CNT under transverse impact load,this study aims to provide help and guidance for the design and prepara-tion of interlayer toughened composites and their mechanical property research.

关 键 词：碳纳米管薄膜 复合材料 高速冲击 数值仿真 抗冲击性能 

分 类 号：V258[一般工业技术—材料科学与工程]