纺织学报 ›› 2016, Vol. 37 ›› Issue (01): 57-63.

• 纺织工程 • 上一篇    下一篇

三维编织复合材料弯曲承载下嵌入碳纳米线的特性分析

  

  • 收稿日期:2014-11-13 修回日期:2015-07-27 出版日期:2016-01-15 发布日期:2016-01-14

Bending load characteristic of carbon nano wires embedded into three-dimensional braided composite

  • Received:2014-11-13 Revised:2015-07-27 Online:2016-01-15 Published:2016-01-14

摘要:

为实现三维编织复合材料实时承载监测,基于碳纳米线嵌入三维编织复合材料预制件的方法,分析了嵌入碳纳米线的三维编织复合材料制件,在不同载荷下三点弯曲的碳纳米线应变传感特性,重点分析了制件拉伸和压缩承载下碳纳米线电阻的变化。实验表明:在三点弯曲过程中,制件加载至断裂应变和碳纳米线电阻变化具有单调一致性, 碳纳米线电阻变化符合一定指数函数关系;在大负荷加载后碳纳米线产生电阻滞后现象;制件卸载后,碳纳米线传感器产生残余电阻。研究证明:碳纳米线传感器在弯曲负载下能够实时感知并监测三维编织复合材料结构健康状况,为三维编织复合材料结构健康监测系统的构建提供了参考。

关键词: 三维编织复合材料, 三点弯曲测试, 碳纳米线传感器, 指数函数, 残余电阻

Abstract:

In order to achieve load monitoring of three-dimensional braided composites in real time, the strain characteristics of carbon nanot wires embedded into three-dimensional braided composites for three point bend test under different loads. The paper focuses on the analysis of resistance change of carbon nanotube thread for composites loading in tensile and compressive. Experimental results show that in the three point bending process, the relation of strain of specimen and change resistance of carbon nanotube thread is monotonic consistency loading to the fracture and resistance variation of carbon nanotube thread accord with exponential form. The hysteresis resistance of carbon nanotube thread is produced after the big load loading. The residual resistance of carbon nanotube thread is produced after unloading. The studies have shown that structure health status of three-dimensional braided composites may be sensed and monitored in real-time using carbon nanotube thread sensor l under bending. It will lay foundation for construction of structural health monitoring system for three-dimensional braided composite.

Key words: three-dimensional braided composite, three point bending test, carbon nano wires sensor, exponential function, residual resistance

中图分类号: 

  • TS101.2
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