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Investigation of the damage mechanisms for mode I delamination growth in foam core sandwich composites using acoustic emission

Fotouhi, Mohamad; Saeedifar, Milad; Sadeghi, Seyedali; Ahmadi Najafabadi, Mehdi; Minak, Giangiacomo

Authors

Milad Saeedifar

Seyedali Sadeghi

Mehdi Ahmadi Najafabadi

Giangiacomo Minak



Abstract

© The Author(s) 2015 In this article, acoustic emission monitoring was used to identify different types of damage mechanisms which occur during delamination of sandwich structures. Features of the obtained acoustic emission signals and wavelet-based signal processing technique were utilized to discriminate failure mechanisms during the delamination test. Dominant damage mechanisms were classified based on their power spectral density in distinct frequency ranges and the energy distribution criterion in each component. The scanning electron microscopy was also employed to verify the results which were obtained from the acoustic emission investigation. It was concluded that frequency domain analysis and wavelet analysis are efficient tools for identification and discrimination of different damage mechanisms in sandwich structures.

Citation

Fotouhi, M., Saeedifar, M., Sadeghi, S., Ahmadi Najafabadi, M., & Minak, G. (2015). Investigation of the damage mechanisms for mode I delamination growth in foam core sandwich composites using acoustic emission. Structural Health Monitoring, 14(3), 265-280. https://doi.org/10.1177/1475921714568403

Journal Article Type Article
Acceptance Date Jan 20, 2015
Online Publication Date Jan 20, 2015
Publication Date Jan 1, 2015
Deposit Date Oct 16, 2017
Journal Structural Health Monitoring
Print ISSN 1475-9217
Electronic ISSN 1741-3168
Publisher SAGE Publications
Peer Reviewed Peer Reviewed
Volume 14
Issue 3
Pages 265-280
DOI https://doi.org/10.1177/1475921714568403
Keywords sandwich composites, acoustic emission, delamination, wavelet-based signal processing techniques
Public URL https://uwe-repository.worktribe.com/output/834698
Publisher URL http://dx.doi.org/10.1177/1475921714568403