Evaluation of paint coating thickness variations based on pulsed Infrared thermography laser technique |
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| Affiliation: | 1. CReSTIC/Châlons, Université de Reims Champagne-Ardenne, Chaussée du port, 51000 Châlons-en-Champagne, France;2. GRESPI/ECATHERM, Université de Reims Champagne-Ardenne, BP 1039, 51687 Reims, France;3. CRITT-MDTS, 3 Boulevard Jean Delautre – ZHT du Moulin Leblanc, 08000 Charleville-Mézières, France;1. Department of Mechanical Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Nam-gu, Pohang 790-784, Republic of Korea;2. School of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, Republic of Korea;3. School of Aerospace & Mechanical Engineering, Korea Aerospace University (KAU), 76, Hanggongdaehang-ro, Deoyang-gu, Goyang-si, Gyeonggi-do 412-791, Republic of Korea;4. Department of Mechanical Design Engineering, Andong National University, 1375 Gyeongdong-ro, Andong-si, Gyeongsangbuk-do 760-749, Republic of Korea;1. La Jolla Cove Consulting, San Diego, CA 92117, USA;2. Tomsk Polytechnic University, Savinykh St., 7, 634028 Tomsk, Russia;3. Tomsk State University, Lenin Av., 36, 634050 Tomsk, Russia;1. Nondestructive Testing Research Center, School of Physical Science and Technology, Southwest Jiaotong University, Chengdu, PR China;2. Fraunhofer Institute for Nondestructive Testing IZFP, Dept. Components and Assemblies, Campus E3 1, 66123, Saarbrücken, Germany;1. Beijing Wuzi University, School of Logistics, Beijing Key Laboratory of Logistics System and Technology, Beijing, 101149, China;2. Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Key Laboratory of Terahertz Optoelectronics, Ministry of Education, and Beijing Advanced Innovation Center for Imaging Theory and Technology, Capital Normal University, Beijing, 100048, China;1. National Key Lab for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, PR China;2. Shenyang University of Technology, School of Mechanical Engineering, 111 Shenliao West Rd, Shenyang 110870, PR China;3. School of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, PR China |
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| Abstract: | In this paper, a pulsed Infrared thermography technique using a homogeneous heat provided by a laser source is used for the non-destructive evaluation of paint coating thickness variations. Firstly, numerical simulations of the thermal response of a paint coated sample are performed. By analyzing the thermal responses as a function of thermal properties and thickness of both coating and substrate layers, optimal excitation parameters of the heating source are determined. Two characteristic parameters were studied with respect to the paint coating layer thickness variations. Results obtained using an experimental test bench based on the pulsed Infrared thermography laser technique are compared with those given by a classical Eddy current technique for paint coating variations from 5 to 130 μm. These results demonstrate the efficiency of this approach and suggest that the pulsed Infrared thermography technique presents good perspectives to characterize the heterogeneity of paint coating on large scale samples with other heating sources. |
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| Keywords: | Non-destructive evaluation Coating thickness variations Heterogeneity Pulsed Infrared thermography Laser heating |
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