Drilling delamination and thermal damage of carbon nanotube/carbon fiber reinforced epoxy composites processed by microwave curing
Drilling delamination and thermal damage of carbon nanotube/carbon fiber reinforced epoxy composites processed by microwave curing
复制标题
微波固化碳纳米管/碳纤维增强环氧复合材料的钻孔分层与热损伤
DOI：
10.1016/j.ijmachtools.2015.06.005
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发表时间：
2015-10-01
影响因子：
14
通讯作者：
Hao, Xiaozhong
中科院分区：
文献类型：
--
作者：
Li, Nanya;Li, Yingguang;Hao, Xiaozhong
碳纤维增强环氧复合材料的钻孔剥离和热损伤是一个严重的问题，特别是对于航空工业的高价值部件。为了抑制分层和钻孔烧蚀，在这项研究中采用了一种创新的方法。将多壁碳纳米管（MWCNTs）引入到基体树脂中，以提高层间强度和导热性能。通过微波固化处理，提高了碳纤维与碳纳米管改性基体之间的界面强度。在钻孔过程中，光纤光栅传感器被用来精确测量钻孔温度。实验结果表明，层间断裂韧性提高了66%以上，相比传统的热固化样品没有多壁碳纳米管。根据计算机断层扫描结果，分层因子降低了16%。MWCNTs增强复合材料的最高钻孔温度低于基体树脂的玻璃化转变温度，与传统复合材料相比下降了23摄氏度。利用这种碳纳米管改性和微波固化的新方法，我们提供了同时减少碳纤维复合材料的钻孔分层和热损伤的能力，并探索了制造和加工一体化的可能性。(C)2015爱思唯尔有限公司版权所有。
The drilling-induced delamination and thermal damage of carbon fiber reinforced epoxy composite materials are serious problems especially for high value components of the aviation industry. To suppress the delamination and drilling ablation, an innovative approach was employed in this study. The multi-walled carbon nanotubes (MWCNTs) were introduced to the matrix resin to improve the interlaminar strength and thermal conductivity. The as-prepared composite was processed by microwave curing to enhance the interface strength between carbon fiber and the carbon nanotubes modified matrix. During the drilling processes, optical fiber Bragg grating sensors were utilized to precisely measure the drilling temperature. Experimental results indicated that the interlaminar fracture toughness was increased by more than 66% compared to that of the traditional thermal cured samples without MWCNTs. And the delamination factor was decreased by 16% according to the computerized tomography scanning results. The maximum drilling temperature of the MWCNTs reinforced composite was below the glass transition temperature of the matrix resin and declined by 23 degrees C compared to traditional composites. With this novel method of carbon nanotube modification and microwave curing, we provide the capability of reducing the drilling delamination and thermal damage of carbon fiber composites simultaneously, and explored the possibility of manufacturing and machining integration. (C) 2015 Elsevier Ltd. All rights reserved.