Issue |
Acta Acust.
Volume 7, 2023
|
|
---|---|---|
Article Number | 57 | |
Number of page(s) | 15 | |
Section | Ultrasonics | |
DOI | https://doi.org/10.1051/aacus/2023054 | |
Published online | 10 November 2023 |
Scientific Article
Delamination thickness measurement based on Stoneley wave in bilayered composite structure
1
State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, PR China
2
Xi’an Modern Control Technology Research Institute, Xi’an, Shaanxi 710065, PR China
* Corresponding author: bli@xjtu.edu.cn
Received:
25
April
2023
Accepted:
4
October
2023
Introduction: For composite structures, delamination usually occurs at the interface. Ultrasonic guided waves have been widely used to detect the delamination. However, most researches focus on the measurement of the delamination length along the interface, and the measurement of the delamination thickness is less studied. Method: In this paper, based on the characteristic that the Stoneley wave only propagates along the interface, the reflection coefficient of interaction between Stoneley wave and delamination is used to measure the delamination thickness. The effects of delamination thickness and frequency on the reflection coefficient are investigated via dividing integral region and reciprocity theorem. Some experimental validations are carried out on two aluminum-steel bilayered composite plates with different delamination thickness. Results: It is found the reflection coefficient increases linearly at first, then its rate of increase slows down gradually, and finally becomes stable, in theory. And the experimental results can verify the theoretical relationship between the reflection coefficients and the delamination thickness. Conclusion: The variation of reflection coefficient provides a reference for the measurement of delamination thickness in Stoneley-wave-based non-destructive testing.
Key words: Ultrasonic guided wave / Stoneley wave / Delamination / Reflection coefficient / Measurement
© The Author(s), Published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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