Impact-Induced Delamination Detection of Composites Based on Laser Ultrasonic Zero-Lag Cross-Correlation Imaging
Author
Source
Advances in Materials Science and Engineering
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-10-25
Country of Publication
Egypt
No. of Pages
8
Abstract EN
This paper presents impact-induced delamination visualization by zero-lag cross-correlation (ZLCC) imaging computed using fully noncontact laser scanned ultrasonic wavefields.
The proposed technique enables instantaneous visualizing of invisible delamination of composite materials without any sensor installation.
Moreover, it provides robust damage diagnosis without comparing with baseline data obtained from the undamaged condition of a target structure, making it possible to minimize false alarms.
First, the existence of internal delamination-induced standing waves is proven by employing a finite element analysis.
Then, how ZLCC can physically isolate and visualize only the standing wave feature from the measured ultrasonic wavefields is shown.
To experimentally validate the proposed technique, a fully noncontact laser ultrasonic imaging system is introduced, and the internal delamination is visualized by laser scanning in a graphite fiber composite plate.
The experimental results reveal that hidden delamination is successfully and automatically visualized and quantified without any users’ intervention.
American Psychological Association (APA)
An, Yun-Kyu. 2016. Impact-Induced Delamination Detection of Composites Based on Laser Ultrasonic Zero-Lag Cross-Correlation Imaging. Advances in Materials Science and Engineering،Vol. 2016, no. 2016, pp.1-8.
https://search.emarefa.net/detail/BIM-1096289
Modern Language Association (MLA)
An, Yun-Kyu. Impact-Induced Delamination Detection of Composites Based on Laser Ultrasonic Zero-Lag Cross-Correlation Imaging. Advances in Materials Science and Engineering No. 2016 (2016), pp.1-8.
https://search.emarefa.net/detail/BIM-1096289
American Medical Association (AMA)
An, Yun-Kyu. Impact-Induced Delamination Detection of Composites Based on Laser Ultrasonic Zero-Lag Cross-Correlation Imaging. Advances in Materials Science and Engineering. 2016. Vol. 2016, no. 2016, pp.1-8.
https://search.emarefa.net/detail/BIM-1096289
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1096289