A fiber-guided motorized rotation laser scanning thermography technique for impact damage crack inspection in composites

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dc.contributor.authorLiu, Haochen
dc.contributor.authorTinsley, Lawrence
dc.contributor.authorDeng, Kailun
dc.contributor.authorWang, Yizhong
dc.contributor.authorStarr, Andrew
dc.contributor.authorChen, Zhenmao
dc.contributor.authorZhao, Yifan
dc.date.accessioned2023-04-14T14:32:02Z
dc.date.available2023-04-14T14:32:02Z
dc.date.issued2023-04-11
dc.description.abstractLaser Thermography manifests superior sensitivity and compatibility to detect cracks and small subsurface defects. However, the existing related systems have limitations on either inspection efficiency or unknown directional cracks due to the utilization of stationary heat sources. This article reports a Fiber-guided Motorised Rotation Laser-line Scanning Thermography (FMRLST) system aiming to rapidly inspect cracks of impact damage with unknown direction in composite laminates. An optical head with fibre delivery integrated with a rotation motor is designed and developed to generate novel scanning heating in a circumferential rotation manner. A FEM model is first proposed to simulate the principle of FMRLST testing and produce thermograms for the development of post-processing methods. A damage enhancement method based on Curvelet Transform is developed to enhance the visualization of thermal features of cracks, and purify the resulting image by suppressing the laser-line heating pattern and cancelling noise. The validation on three composite specimens with different levels of impact damage suggests the developed FMRLST system can extract unknown impact surface cracks efficiently. The remarkable sensitivity and flexibility of FMRLST to arbitrary cracks, along with the miniaturized probe-like inspection unit, present its potential in on-site thermographic inspection, and its design is promising to push the LST towards.en_UK
dc.identifier.citationLiu H, Tinsley L, Deng K, et al., (2024) A fiber-guided motorized rotation laser scanning thermography technique for impact damage crack inspection in composites. IEEE Transactions on Industrial Electronics, Volume 71, Issue 3, March 2024, pp. 3163-3172en_UK
dc.identifier.issn0278-0046
dc.identifier.urihttps://doi.org/10.1109/TIE.2023.3265034
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/19483
dc.language.isoenen_UK
dc.publisherIEEEen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectMotorised Rotating Laser-lineen_UK
dc.subjectLaser scanning thermographyen_UK
dc.subjectBarely Visible Impact Crack (BVIC)en_UK
dc.subjectCurvelet Transformationen_UK
dc.subjectComposite laminatesen_UK
dc.titleA fiber-guided motorized rotation laser scanning thermography technique for impact damage crack inspection in compositesen_UK
dc.typeArticleen_UK

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