Characterization of composite materials damage under quasi-static three-point bending test using wavelet and fuzzy C-means clustering

Fotouhi, M. , Heidary, H., Ahmadi, M. and Pashmforoush, F. (2012) Characterization of composite materials damage under quasi-static three-point bending test using wavelet and fuzzy C-means clustering. Journal of Composite Materials, 46(15), pp. 1795-1808. (doi: 10.1177/0021998311425968)

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Abstract

In this study, two types of specimens, woven [0, 90]s and unidirectional [0]s glass/epoxy composites, were studied. Acoustic emission (AE) monitoring with wavelet-based signal processing technique and Fuzzy C-Means (FCM) clustering method was used to detect the different fracture mechanisms during delamination in quasi-static three-point bending test. The three-point bending test simulates thrust force, the most effective factor in delamination, throughout the process of drilling without backup plate. The obtained AE signals were decomposed into various wavelet levels and classified using FCM. Scanning Electron Microscopy (SEM) observation was used to determine the different fracture mechanisms. The results show that the energy of AE signals has been concentrated in two significant components for both types of specimens, and the dependency percentage of damages in the two specimens is different.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Fotouhi, Dr Mohammad
Authors: Fotouhi, M., Heidary, H., Ahmadi, M., and Pashmforoush, F.
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Journal Name:Journal of Composite Materials
Publisher:SAGE Publications
ISSN:0021-9983
ISSN (Online):1530-793X
Published Online:01 February 2012

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