Acoustic emission-based methodology to evaluate delamination crack growth under quasi-static and fatigue loading conditions

Saeedifar, M., Ahmadi Najafabadi, M., Mohammadi, K., Fotouhi, M. , Hosseini Toudeshky, H. and Mohammadi, R. (2018) Acoustic emission-based methodology to evaluate delamination crack growth under quasi-static and fatigue loading conditions. Journal of Nondestructive Evaluation, 37(1), 1. (doi:10.1007/s10921-017-0454-0)

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Abstract

The aim of this study was to investigate the applicability of acoustic emission (AE) technique to evaluate delamination crack in glass/epoxy composite laminates under quasi-static and fatigue loading. To this aim, double cantilever beam specimens were subjected to mode I quasi-static and fatigue loading conditions and the generated AE signals were recorded during the tests. By analyzing the mechanical and AE results, an analytical correlation between the AE energy with the released strain energy and the crack growth was established. It was found that there is a 3rd degree polynomial correlation between the crack growth and the cumulative AE energy. Using this correlation the delamination crack growth was predicted under both the static and fatigue loading conditions. The predicted crack growth values was were in a good agreement with the visually recorded data during the tests. The results indicated that the proposed AE-based method has good applicability to evaluate the delamination crack growth under quasi-static and fatigue loading conditions, especially when the crack is embedded within the structure and could not be seen visually.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Fotouhi, Dr Mohammad
Authors: Saeedifar, M., Ahmadi Najafabadi, M., Mohammadi, K., Fotouhi, M., Hosseini Toudeshky, H., and Mohammadi, R.
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Journal Name:Journal of Nondestructive Evaluation
Publisher:Springer
ISSN:0195-9298
ISSN (Online):1573-4862
Published Online:16 November 2017
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Journal of Nondestructive Evaluation 37(1): 1
Publisher Policy:Reproduced under a Creative Commons License

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