Experimental Investigation of Bonding Quality for CFRP Bonded Structures with Thick Adhesive Layers Based on Ultrasonic Transmission Coefficient Spectrums

Li, Yongkun; Lyu, Yan; Wu, Bin; Gao, Jie; Bian, Zeqi; He, Cunfu

doi:10.1007/s10921-023-01029-6

Cited by 1 publication

(3 citation statements)

References 38 publications

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“…When making a well-bonded specimen, according to the production process of reference [ 14 , 15 ], the surface of the CFRP is first polished with 600-grit sandpaper. The process is initiated by utilizing acetone to degrease the surface of the polished CFRP, and then glue is applied and molded after the surface is dried.…”

Section: Experimental Measurement and Results Analysismentioning

confidence: 99%

“…Simultaneously combining Equations ( 11)~( 14), the global matrix equation containing the reflection/transmission coefficients is obtained as shown in Equation (15). Among them, block matrices…”

Section: Theoretical Analysismentioning

confidence: 99%

“…He et al [ 14 ] established the ultrasonic theoretical analysis and finite element simulation model of the bonding structure composites based on the matrix method and the spring model method, studying the impact of the weakening of the bonding interface and the weakening of the cohesion of the adhesive layer on the reflection/transmission coefficient. And in terms of reflection/transmission coefficients detection, Li et al [ 15 ] conducted an experimental investigation into the ultrasonic characterization of bond strength degradation. They quantified the degree of bond strength weakening by tracking the shift in the extreme point of the ultrasonic reflection transmission coefficient.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Bonding Defects in Fiber-Reinforced Polymer-Bonded Structures Based on Ultrasonic Transmission Coefficient

Bian,

Wu,

Liu

et al. 2024

Materials

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This research delves into the characterization of the ultrasonic transmission coefficient pertaining to various types of bonding defects in Fiber-Reinforced Polymer (FRP)-bonded structures. Initially, an ultrasonic transmission coefficient calculation model for FRP-bonded structures in a water immersion environment is established. This model is used to analyze the variation in the ultrasonic transmission coefficient under different defect types, namely intact bonding, interfacial slip, and debonding defects. Subsequently, a frequency domain finite element analysis model of FRP-bonded structures with different defect types is constructed. The simulation validates the accuracy of the theoretical analysis results and concurrently analyzes the variation in the transmission signal when the defects alter. Lastly, an experimental platform for water immersion ultrasonic transmission measurement is set up. The transmission signals under different defect types are extracted through experiments and evaluated in conjunction with theoretical calculations to assess the types of bonding defects.

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Section: Experimental Measurement and Results Analysismentioning

confidence: 99%

Section: Theoretical Analysismentioning

confidence: 99%