In Situ Damage Detection for Fiber-Reinforced Composites Using Integrated Zinc Oxide Nanowires
In Situ Damage Detection for Fiber-Reinforced Composites Using Integrated Zinc Oxide Nanowires
复制标题
使用集成氧化锌纳米线对纤维增强复合材料进行原位损伤检测
DOI：
10.1002/adfm.201802846
复制
发表时间：
2018-08-29
影响因子：
19
通讯作者：
Sodano, Henry A.
中科院分区：
文献类型：
--
作者：
Groo, LoriAnne;Inman, Daniel J.;Sodano, Henry A.
介绍了一种多功能材料，它可以增加强度，能够从环境振动中获取能量，并充当结构健康监测系统。目前对纤维增强复合材料的现场损伤检测通常使用的方法需要外部传感器、被评估的每个组件的精确初始测量或向结构输入电流。为了克服这些限制，这项工作利用集成到纤维增强复合材料中的多功能压电氧化锌纳米线界面来提供原位检测损伤的能力。纳米线生长在夹在碳纤维电极之间的绝缘增强纤维上，从而将传感元件完全整合到纤维增强复合材料中。完全分布的纳米线界面被证明能够使用被动电压测量来检测多种损伤模式，如在多种加载配置中所展示的那样。这项工作还分析了对应于损伤的电压发射，以提供对应于试件损伤状态的信号特征，以指示损伤的进展和灾难性故障的途径。因此，这项工作的结果是具有损伤检测能力的多功能结构材料。这项工作中研究的原理也可以扩展到包含纳米颗粒、纳米线或薄膜形式的集成压电材料的替代结构复合材料。
A multifunction material that increases strength is capable of harvesting energy from ambient vibration and acts as a structural health monitoring system is presented. Current in situ damage detection of fiber-reinforced composites typically uses methods which require external sensors, precise initial measurements for each component under evaluation, or input current to the structure. To overcome these limitations, this work utilizes a multifunctional interphase of piezoelectric zinc oxide nanowires integrated into fiber-reinforced composites to provide an in situ ability to sense damage. The nanowires are grown onto insulating reinforcing fibers which are sandwiched between carbon fiber electrodes, thus fully integrating the sensing element into the fiber-reinforced composite. The fully distributed nanowire interphase proves capable of detecting multiple damage modes using passive voltage measurements as demonstrated during multiple loading configurations. This work also analyzes voltage emissions corresponding to damage to provide signal characteristics corresponding to the damage state of the specimen to indicate damage progression and the approach of catastrophic failure. The result of this work is thus a multifunctional structural material with damage detection capabilities. The principles investigated in this work can also be extended to alternative structural composites containing integrated piezoelectric materials in the form of nanoparticles, nanowires, or films.