Share Email Print
cover

Proceedings Paper

Use of laser reflection technique for defect detection in CFRP-concrete systems
Author(s): Qiwen Qiu; Denvid Lau
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

This paper presents a new laser reflection technique which can identify the near-surface defects in concrete structures bonded with carbon fiber reinforced polymer (CFRP). In this study, a laser beam is used to illuminate the surface of CFRP-concrete panel, and the pattern of the laser reflection is recorded by a high resolution digital camera. Under the laser illumination, the surface of the tested object is heated and expanded. The surface expansion can be identified through observing the expanding reflection pattern. Based on our experimental observation, the defect region exhibits much greater expansion of laser reflection pattern than that in intact region. Results also indicate that both the defect area and the defect depth can influence the change of reflection pattern. In view of the measurement principle of the laser reflection technique, it is expected that the application can be further extended to the areas like CFRP-wood structures, CFRP-masonry structures and CFRP-steel structures.

Paper Details

Date Published: 22 April 2016
PDF: 9 pages
Proc. SPIE 9804, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2016, 98041C (22 April 2016); doi: 10.1117/12.2218751
Show Author Affiliations
Qiwen Qiu, City Univ. of Hong Kong (Hong Kong, China)
Denvid Lau, City Univ. of Hong Kong (Hong Kong, China)


Published in SPIE Proceedings Vol. 9804:
Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2016
Tzuyang Yu; Andrew L. Gyekenyesi; Peter J. Shull; H. Felix Wu, Editor(s)

© SPIE. Terms of Use
Back to Top