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Lookup NU author(s): Junzhen Zhu, Professor Gui Yun TianORCiD
This is the authors' accepted manuscript of an article that has been published in its final definitive form by Elsevier Ltd, 2019.
For re-use rights please refer to the publisher's terms and conditions.
© 2019 Elsevier LtdEddy current pulsed thermography (ECPT) and long pulse thermography (LPT) are two emerging non-destructive evaluation techniques that have been recently used for sub-surface defect detection in both metallic and composite components. This paper provides a comparative analysis of these two methods by focussing on the detection of flat bottom holes (FBHs) in both aluminium and carbon fibre reinforced plastic samples. Principal component analysis was used for the post-processing of thermal data in order to enhance the detection of FBHs with various diameters and depths. Results showed that LPT had a better performance for detecting FBHs in low-thermally conductive materials such as carbon fibre-reinforced thermoplastic composites, whilst ECPT revealed a superior performance for detecting FBHs in materials with higher thermal and electrical conductivity such as aluminium.
Author(s): Wang Z, Zhu J, Tian G, Ciampa F
Publication type: Article
Publication status: Published
Journal: NDT & E International
Year: 2019
Volume: 107
Online publication date: 09/08/2019
Acceptance date: 08/08/2019
Date deposited: 23/10/2019
ISSN (print): 0963-8695
ISSN (electronic): 1879-1174
Publisher: Elsevier Ltd
URL: https://doi.org/10.1016/j.ndteint.2019.102155
DOI: 10.1016/j.ndteint.2019.102155
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