Damage monitoring of composite materials based on twist energy of carbon nanotube yarns

被引：0
|
作者：
Li P. [1 ]
Wan Z. [2 ]
Jia M. [1 ]
机构：
[1] School of Textile Science and Engineering, Tiangong University, Tianjin
[2] Engineering Teaching Center, Tiangong University, Tianjin
来源：
Wan, Zhenkai (wanzhenkai@tjpu.edu.cn) | 1600年 / China Textile Engineering Society卷 / 41期
关键词：
Carbon nanotube yarn; Damage index; Damage monitoring of composite material; Three-dimensional six-directional braiding; Twist electric energy;
D O I：
10.13475/j.fzxb.20190404506
中图分类号：
学科分类号：
摘要：
In order to achieve comprehensive monitoring of internal damage of aerospace structural specimens, a new real-time monitoring method was proposed based on the new discovery of the twisting energy feature of carbon nanotube yarns. This method uses three-dimensional six-directional braiding technology to embed carbon nanotube yarns into aerospace composite structural specimens to construct the new type of intelligent three-dimensional composite material. Studies have proved that when internal damage occurs in specimens, the twist of the carbon nanotube yarns embedded inside the specimens will change and generate twisting energy. The principal component analysis and damage index theory were used to analyze the twisting energy data of carbon nanotube yarns. The experimental results show that the resin fractures, holes and tiny cracks in the three-dimensional braiding composite specimens will cause changes in twist electric energy. The twist electric energy of carbon nanotube yarns has a high recognition accuracy of the internal damage of the specimens, which reaches 0.002 mm in this research. This finding has of practical significance for the advancement of intelligent monitoring of aerospace structures. Copyright No content may be reproduced or abridged without authorization.
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页码：58 / 63
页数：5
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