Acousto-ultrasonic sensing for delaminated GFRP composites using an embedded FBG sensor
Article
Article Title | Acousto-ultrasonic sensing for delaminated GFRP composites using an embedded FBG sensor |
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ERA Journal ID | 1274 |
Article Category | Article |
Authors | Lam, Pou-Man (Author), Lau, Kin-Tak (Author), Ling, Hang-Yin (Author), Su, Zhong-Qing (Author) and Tam, Hwa-Yaw (Author) |
Journal Title | Optics and Lasers in Engineering |
Journal Citation | 47 (10), pp. 1049-1055 |
Number of Pages | 7 |
Year | 2009 |
Place of Publication | Oxford, UK |
ISSN | 0143-8166 |
1873-0302 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.optlaseng.2009.01.010 |
Abstract | In this paper, an active damage detection system for composite laminates is introduced. A fiber Bragg grating (FBG) was employed as an embedded sensor for detecting ultrasonic Lamb wave generated by a piezoelectric (PZT) actuator, inside the laminates. There were two different configurations for the system, making use of a broadband light source and a laser source, respectively. It was found that the use of a laser source could provide a higher sensitivity, so it was preferred in an ultrasonic signal acquisition unit for damage detection. When a delamination is developed in composite structures, the propagation characteristics of Lamb wave is then changed. According to altered signals, the types and natures of delamination inside the structures can be evaluated. In this experiment, glass fiber-reinforced epoxy (GFRP) composite beams were used to study the feasibility of our proposed detection technique. FBG sensors were embedded in different layers of the composite beams. The responses of FBG sensors from both intact and delaminated composite beams were then compared. Finally, the acquired Lamb wave signals corresponding to different delamination sizes and locations were examined. |
Keywords | lamb wave; composite structures; damage detection; delamination; broadband light sources; composite beam; composite laminate; delaminated composite beams; detection technique; embedded FBG; embedded sensors; FBG sensor; Fiber Bragg grating (FBG); GFRP composites; glass fiber-reinforced epoxy; laser sources; propagation characteristics; PZT; ultrasonic lamb waves; ultrasonic sensing; ultrasonic signals |
ANZSRC Field of Research 2020 | 400607. Signal processing |
400505. Construction materials | |
401602. Composite and hybrid materials | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Hong Kong Polytechnic University, China |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q0q60/acousto-ultrasonic-sensing-for-delaminated-gfrp-composites-using-an-embedded-fbg-sensor
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