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Proceedings Paper

Optical NDT of delaminated plates under shear wave excitation
Author(s): S. I. Ishak; W. K. Chiu; Gui-Rong Liu; Siak-Piang Lim; Huai Min Shang
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Paper Abstract

Adhesive bonding has been accepted as an important process in the manufacturing and repair industries. However, the tendency of delamination at the bonded region due to improper bonding procedures, and unfavorable loading conditions and service environment has necessitated development of reliable inspection techniques for ensuring the structural integrity of these bonded structures. Optical inspection techniques have, over the last three decades since the invention of the laser, gained wide acceptance because they are non-destructive and non-contacting, and accurate measurements in the order of light-wavelengths may be obtained very rapidly. Optical flaw-detection generally requires the application of a load-increment on the structure, the response of the illuminated surface of the structure is then compared with that of a non-defective structure. The load-increments used are in various forms, such as vacuum stressing, heating, static mechanical loads, and steady-state mechanical excitations.

Paper Details

Date Published: 13 June 2001
PDF: 6 pages
Proc. SPIE 4317, Second International Conference on Experimental Mechanics, (13 June 2001); doi: 10.1117/12.429593
Show Author Affiliations
S. I. Ishak, National Univ. of Singapore (Singapore)
W. K. Chiu, Monash Univ. (Australia)
Gui-Rong Liu, National Univ. of Singapore (Singapore)
Siak-Piang Lim, National Univ. of Singapore (Singapore)
Huai Min Shang, National Univ. of Singapore (Singapore)

Published in SPIE Proceedings Vol. 4317:
Second International Conference on Experimental Mechanics
Fook Siong Chau; Chenggen Quan, Editor(s)

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