Piezoresistive Sensing Approaches for Structural Health Monitoring of Polymer Composites-A Review

被引:54
作者
Nauman, Saad [1 ]
机构
[1] Inst Space Technol, Mat Sci & Engn Dept, Islamabad 44000, Pakistan
来源
ENG | 2021年 / 2卷 / 02期
关键词
structural health monitoring; piezoresistive sensors; smart composites; self-sensing composites; CARBON NANOTUBE THREAD; ENABLED FIBER SENSORS; STRAIN SENSOR; METAL COMPOSITES; NAFION/LAYERED SILICATE; CHARGE-TRANSPORT; DAMAGE; ACTUATORS; PERFORMANCE; SYSTEM;
D O I
10.3390/eng2020013
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Structural health monitoring (SHM) is an emerging paradigm of real-time in situ structural evaluation for the detection of damage and structural degradation. This is achieved while the structure is kept in-service as against traditional non-destructive evaluation (NDE) techniques which require scheduled interventions while the structure is kept offline. SHM offers great advantages over traditional regimens of condition monitoring (CM) by improving structural reliability and safety through timely detection of structural defects also known as "diagnosis". Polymeric composite materials offer the unique opportunity of integrating different phases for designing self-sensing smart systems capable of self-diagnosis. Polymers are unique in the sense that they can be designed in various configurations as they generally have facile manufacturing procedures. Among other properties, piezoresistance is the one that can be detected in composites in real-time as a function of strain. Conductive polymers including intrinsic and extrinsic conductive polymers can be used to induce piezoresistivity in composites. Careful design procedures can be adopted to maximize the sensitivity of these piezoresistive composites in order to fully exploit the potential of this property for SHM. Various manufacturing/integration strategies can be employed to effectively use piezoresistance in composites for structural health monitoring. These include self-sensing in carbon fiber-reinforced composites, use of surface deposited/mounted sensing films and patterns, integration of filaments and yarns during reinforcement manufacturing or lay-up and impregnation of reinforcements with piezoresistive matrices. A comprehensive review of these techniques is presented with the view of their utility in the SHM of composites. A selection criterion for these techniques is also presented based on sensitivity, manufacturing method and detection capability.
引用
收藏
页码:197 / 226
页数:30
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