Defect detection in honeycomb sandwich structures using time-average digital holography
Binu P Thomas, S Annamalai Pillai and C S Narayanamurthy

Abstract

Honeycomb sandwich bonded constructions are extensively being used owing to their high bending stiffness and high specific strength in aerospace industries. However, the main problem lies in reduction of stiffness due to debond and delamination in such structures which may result in failure. Though, vibration-induced damage identification and health monitoring methods are widely used to ascertain proper bonding of face sheets to the honeycomb core, for accurate defect detection of such complex structures, noncontact, whole field, highly sensitive, fast and easy to use techniques are required. In this paper, we report a non-contact optical interferometry-based time-average digital holographic technique for accurate defect detection in honeycomb sandwich structures. © Anita Publications. All rights reserved.
Keywords: Time-average digital holography, Honeycomb structures, Optical interferometry.

Peer Review Information
Method: Single- anonymous; Screened for Plagiarism? Yes
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