Guided waves for debonding identification in CFRP-reinforced concrete beams

Li, Jiashen; Lu, Ye; Guan, Ruiqi; Qu, Wenzhong

doi:10.1016/j.conbuildmat.2016.11.058

Cited by 47 publications

(30 citation statements)

References 37 publications

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“…For composites, since bonding of two composite parts with adhesives is the preferred choice over the conventional mechanical fastening approach, detecting debonding is a crucial factor when maintaining a composite structure. Some of the recent studies in this area include effects of sensor debonding failure on mathematical representation of smart composite laminate [10], piezoelectric wafer guided wave-based debonding of carbon fiber reinforced polymer (CFRP) overlay in CFRP-reinforced concrete structures [11], and laser ultrasonic guided waves for detecting debonding of multilayered bonded composites [12]. Although various NDT methods are available for detecting damage, most of the methods require well-trained experts or heavy equipment to perform the procedure.…”

Section: Introductionmentioning

confidence: 99%

Toward Creating a Portable Impedance-Based Nondestructive Testing Method for Debonding Damage Detection of Composite Structures

Na¹,

Park²

2019

Applied Sciences

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Debonding detection of composite structures is a vital task as such damage weakens the structure leading to a failure. As adhesive bonding is a more preferable choice over the conventional mechanical fastening method, detecting debonding as early as possible could minimize the overall maintenance costs. For this reason, a vast amount of research in the nondestructive testing field is being conducted as we speak. However, most of the methods may require well-trained experts or heavy equipment. In this study, the piezoelectric (PZT) material-based method known as the electromechanical impedance technique is investigated to seek the possibility of making the technique very cheap and portable by temporarily attaching the sensor. Furthermore, ANSYS simulation studies using smaller PZT patches as small as 0.1 mm × 0.1 mm are simulated to investigate the impedance signatures acquired from the simulations. The results show the possibility of using smaller PZT patches compared to the conventional PZT sizes of 10 mm × 10 mm for a successful damage identification process.

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Section: Introductionmentioning

confidence: 99%

Toward Creating a Portable Impedance-Based Nondestructive Testing Method for Debonding Damage Detection of Composite Structures

Na¹,

Park²

2019

Applied Sciences

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“…To this day, based on different inspection equipment, several non-destructive evaluation methods have been proposed to detect the interfacial defects within the adhesive layer for EB-FRP systems. [3][4][5] These studies demonstrated the possibility to monitor the debonding of EB-FRP systems with adequate techniques. It should be noted that, since the bond strength is less predictable than the material strength, such debonding failure is considerably brittle and difficult to be predicted, which still limits the design and analysis of EB-FRP-strengthened structures in practice.…”

Section: Introductionmentioning

confidence: 99%

An approach of steel plate hybrid bonding technique to externally bonded fibre-reinforced polymer strengthening system

Zhang

Cheng

2018

International Journal of Distributed Sensor Networks

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The strengthening efficiency of externally bonded fibre-reinforced polymer to concrete structure is usually limited owing to the unexpected debonding of fibre-reinforced polymer laminates. In this study, a new steel plate hybrid bonding technique was developed to supply additional anchorage for traditional externally bonded fibre-reinforced polymer strengthening system. With this approach, the fibre-reinforced polymer debonding can be effectively prevented. Moreover, the stress concentration, which probably results in a premature fracture of fibre-reinforced polymer laminates as that performed for available hybrid bonding anchorage techniques, can be eliminated by introducing a steel plate between the mechanical fasteners and fibre-reinforced polymer strips. To verify the effect of this new method, 21 carbon fibrereinforced polymer-strengthened beams were studied on the flexural behaviours. Test results showed that, compared to available hybrid bonding anchorage techniques, steel plate hybrid bonding is more capable of making the full use of fibre-reinforced polymer laminates and further enhance the ultimate capacity and ductility of externally bonded fibrereinforced polymer-strengthened beams. Based on the experimental results, the effect of interfacial treatment, ply of carbon fibre-reinforced polymer and mechanical fastener spacing on the failure mode and ultimate load ratio were discussed. Eventually, a simplified analytical procedure was proposed and verified to estimate the flexural resistance of steel plate hybrid bonding -fibre-reinforced polymer-strengthened beam.

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“…As the tracked component ( ) can be written as (3), where the envelope ( ) needs to be computed. Generally, ( ) fulfills [29] ( ) = ( ) ,…”

Section: The Structural Equationmentioning

confidence: 99%

“…The method can estimate the location, severity, and type of defects. Successful applications of defect identification of carbon fibre composites have been done [3,6,7]. However, dispersion effects and noise make ultrasonic testing waves as multicomponent signals, which results in that it is difficult to do NDE/NDT with raw testing waves.…”

Section: Introductionmentioning

confidence: 99%

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A Signal Decomposition Method for Ultrasonic Guided Wave Generated from Debonding Combining Smoothed Pseudo Wigner-Ville Distribution and Vold–Kalman Filter Order Tracking

Chen

2017

Shock and Vibration

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Carbon fibre composites have a promising application future of the vehicle, due to its excellent physical properties. Debonding is a major defect of the material. Analyses of wave packets are critical for identification of the defect on ultrasonic nondestructive evaluation and testing. In order to isolate different components of ultrasonic guided waves (GWs), a signal decomposition algorithm combining Smoothed Pseudo Wigner-Ville distribution and Vold-Kalman filter order tracking is presented. In the algorithm, the time-frequency distribution of GW is first obtained by using Smoothed Pseudo Wigner-Ville distribution. The frequencies of different modes are computed based on summation of the time-frequency coefficients in the frequency direction. On the basis of these frequencies, isolation of different modes is done by Vold-Kalman filter order tracking. The results of the simulation signal and the experimental signal reveal that the presented algorithm succeeds in decomposing the multicomponent signal into monocomponents. Even though components overlap in corresponding Fourier spectrum, they can be isolated by using the presented algorithm. So the frequency resolution of the presented method is promising. Based on this, we can do research about defect identification, calculation of the defect size, and locating the position of the defect.

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Guided waves for debonding identification in CFRP-reinforced concrete beams

Cited by 47 publications

References 37 publications

Toward Creating a Portable Impedance-Based Nondestructive Testing Method for Debonding Damage Detection of Composite Structures

Toward Creating a Portable Impedance-Based Nondestructive Testing Method for Debonding Damage Detection of Composite Structures

An approach of steel plate hybrid bonding technique to externally bonded fibre-reinforced polymer strengthening system

A Signal Decomposition Method for Ultrasonic Guided Wave Generated from Debonding Combining Smoothed Pseudo Wigner-Ville Distribution and Vold–Kalman Filter Order Tracking

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