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Do high frequency acoustic emission events always represent fibre failure in CFRP laminates?

Oz, Fatih E.; Ersoy, Nuri; Lomov, Stepan V.

Authors

Fatih E. Oz

Nuri Ersoy Nuri3.Ersoy@uwe.ac.uk
Senior Lecturer in Mechanical Engineering

Stepan V. Lomov



Abstract

© 2017 Elsevier Ltd When damage in carbon fibre reinforced composites (CFRP) is monitored by acoustic emission (AE), it is a common belief that high frequency AE events originate from fibre failure. This shows that this statement may not correspond to the reality, and matrix cracks can emit high frequency AE signals. Quasi-static tension of [−45 2 /0 2 /+45 2 /90 2 ] s laminates was monitored by AE, Digital Image Correlation (DIC) on the surface of the sample and in-situ optical microscopy on the sample's polished edge. Unsupervised k-means clustering algorithm was applied to the AE results. By comparison with the direct DIC and microscopic observations, the AE cluster with high frequency and low amplitude was found to correspond to directly observed matrix cracks.

Citation

Oz, F. E., Ersoy, N., & Lomov, S. V. (2017). Do high frequency acoustic emission events always represent fibre failure in CFRP laminates?. Composites Part A: Applied Science and Manufacturing, 103, 230-235. https://doi.org/10.1016/j.compositesa.2017.10.013

Journal Article Type Article
Acceptance Date Oct 12, 2017
Online Publication Date Oct 13, 2017
Publication Date Dec 1, 2017
Deposit Date Jul 19, 2018
Journal Composites Part A: Applied Science and Manufacturing
Print ISSN 1359-835X
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 103
Pages 230-235
DOI https://doi.org/10.1016/j.compositesa.2017.10.013
Keywords damage mechanics, acoustic emission, digital image correlation (DIC), carbon fibre, polymer-matrix composites (PMC)
Public URL https://uwe-repository.worktribe.com/output/876915
Publisher URL http://dx.doi.org/10.1016/j.compositesa.2017.10.013
Additional Information Additional Information : This is the author's accepted manuscript. The final published version is available here: http://dx.doi.org/10.1016/j.compositesa.2017.10.013.

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