Quantifying uncertainty in pulsed thermographic inspection by analysing the thermal diffusivity measurements of metals and composites

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dc.contributor.authorAddepalli, Sri
dc.contributor.authorZhao, Yifan
dc.contributor.authorErkoyuncu, John Ahmet
dc.contributor.authorRoy, Rajkumar
dc.date.accessioned2021-08-19T10:54:52Z
dc.date.available2021-08-19T10:54:52Z
dc.date.issued2021-08-14
dc.description.abstractPulsed thermography has been used significantly over the years to detect near and sub-surface damage in both metals and composites. Where most of the research has been in either improving the detectability and/or its applicability to specific parts and scenarios, efforts to analyse and establish the level of uncertainty in the measurements have been very limited. This paper presents the analysis of multiple uncertainties associated with thermographic measurements under multiple scenarios such as the choice of post-processing algorithms; multiple flash power settings; and repeat tests on four materials, i.e., aluminium, steel, carbon-fibre reinforced plastics (CFRP) and glass-fibre reinforced plastics (GFRP). Thermal diffusivity measurement has been used as the parameter to determine the uncertainty associated with all the above categories. The results have been computed and represented in the form of a relative standard deviation (RSD) ratio in all cases, where the RSD is the ratio of standard deviation to the mean. The results clearly indicate that the thermal diffusivity measurements show a large RSD due to the post-processing algorithms in the case of steel and a large variability when it comes to assessing the GFRP laminatesen_UK
dc.identifier.citationAddepalli S, Zhao Y, Erkoyuncu JA, Roy R (2021) Quantifying uncertainty in pulsed thermographic inspection by analysing the thermal diffusivity measurements of metals and composites. Sensors, Volume 21, Issue 16, August 2021, Article number 5480en_UK
dc.identifier.issn1424-8220
dc.identifier.urihttps://doi.org/10.3390/s21165480
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/17023
dc.language.isoenen_UK
dc.publisherMDPIen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectpulsed thermographyen_UK
dc.subjectuncertainty quantificationen_UK
dc.subjectthermal diffusivityen_UK
dc.titleQuantifying uncertainty in pulsed thermographic inspection by analysing the thermal diffusivity measurements of metals and compositesen_UK
dc.typeArticleen_UK

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