Autonomous damage recognition in visual inspection of laminated composite structures using deep learning

Fotouhi, S. , Pashmforoush, F., Bodaghi, M. and Fotouhi, M. (2021) Autonomous damage recognition in visual inspection of laminated composite structures using deep learning. Composite Structures, 268, 113960. (doi: 10.1016/j.compstruct.2021.113960)

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This study proposes the exploitation of deep learning for quantitative assessment of visual detectability of different types of in-service damage in laminated composite structures such as aircraft and wind turbine blades. A comprehensive image-based data set is collected from the literature containing common microscale damage mechanisms (matrix cracking and fibre breakage) and macroscale damage mechanisms (impact and erosion). Then, automated classification of the damage type and severity was done by pre-trained version of AlexNet that is a stable convolutional neural network for image processing. Pre-trained ResNet-50 and 5 other user-defined convolutional neural networks were also used to evaluate the performance of AlexNet. The results demonstrated that employing AlexNet network, using the relatively small image dataset, provided the highest accuracy level (87%-96%) for identifying the damage severity and types in a reasonable computational time. The generated knowledge and the collected image data in this paper will facilitate further research and development in the field of autonomous visual inspection of composite structures with the potential to significantly reduce the costs, health and safety risks and downtime associated with integrity assessment.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Fotouhi, Dr Sakineh and Fotouhi, Dr Mohammad
Authors: Fotouhi, S., Pashmforoush, F., Bodaghi, M., and Fotouhi, M.
College/School:College of Science and Engineering > School of Engineering
College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Composite Structures
ISSN (Online):1879-1085
Published Online:13 April 2021
Copyright Holders:Copyright © 2021 The Authors
First Published:First published in Composite Structures 268:113960
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
310254Novel architectures for visibility and tolerance of impact damage in composites (VIDCOM)Mohammad FotouhiEngineering and Physical Sciences Research Council (EPSRC)EP/V009451/1ENG - Aerospace Sciences