Characterisation of impact damage of composite structures using wavelet-based fusion of ultrasonic and optical images

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

Abstract

This paper presents the novel approach for the impact damage characterisation of composite structures, which is based on fusion of ultrasonic scans and optical images. Both internal (inter-fibre failure, fibre failure, delaminations) and external (scratches and surface cracks) damages occurred in the composite structures during their operation need to be analysed due to their occurrence on both of these levels, especially in the case of impact damages. The presented approach allows for the improvement of the characterisation quality, i.e. the whole damaged area could be detected and localized. In order to assure the proper damage identification the wavelet-based fusion with application of appropriate wavelets and parameters of a fusion algorithm was used, which allows for distinction of different types of damages and overall improvement of the resulted image with respect to the human perception capability. The approach was validated experimentally on the glass-epoxy laminated plates after the low-velocity impacts. Representative cases of damaged structure were presented and analysed.

Details

Original languageEnglish
Pages (from-to)123-130
Number of pages8
JournalAdvanced Composites Letters
Volume23
Issue number5
Publication statusPublished - 1 Sept 2014
Peer-reviewedYes

Keywords

Keywords

  • Damage detection, Geometrical optics, Image enhancement, Image fusion, Structure (composition), Damage Identification, Damaged structures, Fusion algorithms, Representative case, Ultrasonic scan, Failure (mechanical), Low velocity impact, Laminated plate, Human perception