Characterization on the Beam Profile for Defect Detection of Unidirectional CFRP Composites Using NDE Techniques

Hua Liang; Xiao-Long Shi; Peng Zhang; Gui-Lin Zhang; Young-Tae Cho; Yun-Taek Yeom; Yong-Deuck Woo; Kwang-Hee Im

doi:10.7735/ksmte.2023.32.6.326

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한국생산제조학회
한국생산제조학회지 학술저널
한국생산제조학회지 Vol.32 No.6
2023.12 326 - 339 (14page)
DOI : 10.7735/ksmte.2023.32.6.326

저자정보

Hua Liang (Woosuk University)
Xiao-Long Shi (Woosuk University)
Peng Zhang (Woosuk University)
Gui-Lin Zhang (Woosuk University)
Young-Tae Cho (Jeonju University)

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Nondestructive evaluation (NDE) technology has garnered interest as an inspection tool in various industries. In this study, ultrasonic technology was applied to the defect monitoring of carbon fiber reinforced plastic (CFRP) composite materials. By using ultrasonic technology, major ultrasonic reflection signals were observed in sequential order for defect evaluation in unidirectional composites. As ultrasonic waves propagate through the unidirectional CFRP composite, mode conversion, attenuation, and scattering results in a relative decrease in the peak-to-peak amplitude of the reflected ultrasonic signals, indicating the presence of defects. In the pitch-catch mode, three to four ultrasonic reflection signals were observed, and by implementing the beam profile of the reflected signals, we confirmed that the signal-to-noise ratio can be utilized as a key parameter for NDE by providing an effective scanning range of ultrasonic amplitudes.

#NDE techniques #Defect detection #Beam profile #CFRP composites #Wind turbine blades