Health monitoring of composite materials based on BP sensors under complex environments

Micro & nano letters

article

Xiaoqiang Wang¹  Hailong Tang¹  Shaowei Lu²  Junchi Ma²  Keming Ma²  Shuai Wang¹  Xiangdong Yang² 

[1] Faculty of Aeronautical and Astronautical Engineering, Shenyang Aerospace University (SAU);Faculty of Materials Science and Engineering, Shenyang Aerospace University (SAU)

关键词: laminates;    fatigue;    fatigue testing;    curing;    tensile strength;    humidity;    glass fibres;    glass fibre reinforced composites;    chemical sensors;    carbon nanotubes;    nanocomposites;    fatigue cycle number;    BP sensors;    health monitoring;    aerospace composites;    composite materials;    complex environment;    air thermal cycle test;    relative humidity cycle test;    glass fibre prepreg;    composite laminate;    tension–tension fatigue;    electrical–mechanical response;    tensile experiments;    gauge factor changes;    fatigue test;    resistance change rate varies;    bucky paper;    curing;   

DOI  :  10.1049/mnl.2019.0312

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

In this study, the air thermal cycle test and the relative humidity (RH) cycle test were carried out to buckypaper (BP) co-cured with glass fibre prepreg together in order to verify the practicality and stability of the sensor in complex environment. The BP bonded with composite laminate were subjected to tension and tension–tension fatigue up to 1000 cycles when the sensor is subjected to temperature changed from 20 to 120°C and different RH from 0 to 85%, respectively, and the electrical–mechanical response shows that the resistance of sensor increases as the humidity increases, and ultimately the change rate tends to be stable. Tensile experiments shows that gauge factor (GF) changes by 327 and 306%, respectively. The authors finished the fatigue experiment to specimen of the longest environmental treatment in order to further verify the practicality of the sensors, in the fatigue test, the resistance change rate varies with the number of cycles, and it tends to be stable after a period of time. The authors draw the curve of GF and fatigue cycle number so that the stability of the sensors are better reflected, the result is consistent with the fatigue result. Therefore, BP sensors can be applied to the health monitoring of aerospace composites.

【 授权许可】

CC BY|CC BY-ND|CC BY-NC|CC BY-NC-ND