Adhesive Defect Monitoring of Glass Fiber Epoxy Plate Using an Impedance-Based Non-Destructive Testing Method for Multiple Structures

Na, Wongi S.; Baek, Jongdae

doi:10.3390/s17061439

Cited by 6 publications

(2 citation statements)

References 29 publications

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“…Büyüköztürk and Yu developed an NDT radar with an airborne horn antenna for detecting near-surface debonding in GFRP-wrapped concrete columns [ 22 ]. Na and Baek took glass fiber composite plates as specimens and applied an EMI method to monitor adhesive debonding [ 23 ]. Azari et al tested several detective concrete slabs of varying thickness using IE and USW methods [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Real-Time Monitoring of Bond Slip between GFRP Bar and Concrete Structure Using Piezoceramic Transducer-Enabled Active Sensing

Ren

Deng

et al. 2018

Sensors

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Glass fiber-reinforced polymers (GFRPs) have received increasing attention in recent years due to their overall performance of light weight, low cost and corrosion resistance, and they are increasingly used as reinforcement in concrete structures. However, GFRP material has low elastic modulus and linear elastic properties compared with steel bars, which introduces different bonding characteristics between bars and concrete. Therefore, a reliable monitoring method is urgently needed to detect the bond slip in GFRP-reinforced concrete structures. In this paper, a piezoceramic-based active sensing approach is proposed and developed to find the debonding between a GFRP bar and the concrete structure. In the proposed method, we utilize PZT (lead zirconate titanate) as two transducers. One acts as an actuator which is buried in the concrete structure, and the other acts as a sensor which is attached to the GFRP bar by taking advantage of machinability of the GRRP material. Both transducers are strategically placed to face each other across from the interface between the GFRP bar and the concrete. The actuator provokes a stress wave that travels through the interface. Meanwhile, the PZT patch that is attached to the GFRP bar is used to detect the propagating stress wave. The bonding condition determines how difficult it is for the stress wave traveling through the interface. The occurrence of a bond slip leads to cracks between the bar and the concrete, which dramatically reduces the energy carried by the stress wave through the interface. In this research, two specimens equipped with the PZT transducers are fabricated, and pull-out tests are conducted. To analyze the active sensing data, we use wavelet packet analysis to compute the energy transferred to the sensing PZT patch throughout the process of debonding. Experimental results illustrate that the proposed method can accurately capture the bond slip between the GFRP bar and the concrete.

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Section: Introductionmentioning

confidence: 99%

Real-Time Monitoring of Bond Slip between GFRP Bar and Concrete Structure Using Piezoceramic Transducer-Enabled Active Sensing

Ren

Deng

et al. 2018

Sensors

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“…[ 25 , 38 , 39 , 41 , 43 , 45 , 77 , 80 , 81 ]. The performance of the piezoelectric impedance-based method has been validated by laboratory experiments such as damage detection for composite-reinforced concrete walls and the detection of a loosening bolt on an experimental three-story moment-resisting frame structure, adhesive defect monitoring of lass fiber epoxy [ 38 , 44 ]. Figure 2 b displays how the PZT sensors are installed to monitor a structure via measuring impedance variations.…”

Section: Piezoelectric Impedance Sensing Techniquementioning

confidence: 99%

Piezoelectric Sensing Techniques in Structural Health Monitoring: A State-of-the-Art Review

Jiao

Egbe

Xie

et al. 2020

Sensors

117

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Recently, there has been a growing interest in deploying smart materials as sensing components of structural health monitoring systems. In this arena, piezoelectric materials offer great promise for researchers to rapidly expand their many potential applications. The main goal of this study is to review the state-of-the-art piezoelectric-based sensing techniques that are currently used in the structural health monitoring area. These techniques range from piezoelectric electromechanical impedance and ultrasonic Lamb wave methods to a class of cutting-edge self-powered sensing systems. We present the principle of the piezoelectric effect and the underlying mechanisms used by the piezoelectric sensing methods to detect the structural response. Furthermore, the pros and cons of the current methodologies are discussed. In the end, we envision a role of the piezoelectric-based techniques in developing the next-generation self-monitoring and self-powering health monitoring systems.

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Low cost technique for detecting adhesive debonding damage of glass epoxy composite plate using an impedance based non-destructive testing method

2018

Composite Structures

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Adhesive Defect Monitoring of Glass Fiber Epoxy Plate Using an Impedance-Based Non-Destructive Testing Method for Multiple Structures

Cited by 6 publications

References 29 publications

Real-Time Monitoring of Bond Slip between GFRP Bar and Concrete Structure Using Piezoceramic Transducer-Enabled Active Sensing

Real-Time Monitoring of Bond Slip between GFRP Bar and Concrete Structure Using Piezoceramic Transducer-Enabled Active Sensing

Piezoelectric Sensing Techniques in Structural Health Monitoring: A State-of-the-Art Review

Low cost technique for detecting adhesive debonding damage of glass epoxy composite plate using an impedance based non-destructive testing method

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