Thermal diffusivity measurements on porous carbon fiber reinforced polymer tubes

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Abstract

This work presents the application of methods for the determination of the thermal diffusivity well suited for flat bodies adapted to cylindrical bodies. Green’s functions were used to get the temperature time history for small and large times, for the approach of intersecting these two straight lines. To verify the theoretical considerations noise free data are generated by finite element simulations. Furthermore effects of inhomogeneous excitation and the anisotropic heat conduction of carbon fiber reinforced polymers were taken into account in these numerical simulations. It could be shown that the intersection of the two straight lines is suitable for the determination of the thermal diffusivity, although the results have to be corrected depending on the ratio of the cylinders inner and outer radii. Inhomogeneous excitation affects the results of this approach as it lead to multidimensional heat flux. However, based on the numerical simulations a range of the azimuthal angle exists, where the thermal diffusivity is nearly independent of the angle. The method to determine the thermal diffusivity for curved geometries by the well suited Thermographic Signal Reconstruction method and taking into account deviations from the slab by a single correction factor has great advantages from an industrial point of view, just like an easy implementation into evaluation software and the Thermographic Signal Reconstruction methods rather short processing time.
Original languageEnglish
Title of host publication43rd Annual Review of Progress in Quantitative Nondestructive Evaluation, Volume 36
EditorsLeonard J. Bond, Dale E. Chimenti
Number of pages10
ISBN (Electronic)9780735414747
DOIs
Publication statusPublished - 16 Feb 2017
Event43rd Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE) - Atlanta, United States
Duration: 17 Jul 201622 Jul 2016

Publication series

NameAIP Conference Proceedings
Volume1806
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference43rd Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE)
Country/TerritoryUnited States
CityAtlanta
Period17.07.201622.07.2016

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