Analytical and numerical computations of heat transfer in pulsed thermography applied to porous CFRP

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3 Citations (Scopus)

Abstract

In this paper we show a detailed verification of an analytical thermal diffusivity model using finite element simulations. The real pore morphology for the simulation models are obtained by computed tomography measurements. The heat transfer by conduction is simulated in transient analyses. The thermal diffusivity values are calculated from the temperature field on the front (reflection mode) and on the back sides (transmission mode). Investigations show that the analytical model correlates well with the thermal diffusivity values calculated in transmission mode. Furthermore, the simulations show a discrepancy in the reflection mode measurements due to the stronger influence of the pore morphology. These findings are similar to those seen in pulsed thermography experiments. In conclusion, the analytical thermal diffusivity model allows a precise quantification of porosity in carbon fiber reinforced polymer structures using transmission mode measurements.

Original languageEnglish
Title of host publicationReview of Progress in Quantitative Nondestructive Evaluation
PublisherAIP Publishing
Pages1025-1032
Number of pages8
Edition31
ISBN (Print)9780735410138
DOIs
Publication statusPublished - 2012
Event38th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE - Burlington, VT, United States
Duration: 17 Jul 201122 Jul 2011

Publication series

NameAIP Conference Proceedings
Number31
Volume1430
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference38th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE
Country/TerritoryUnited States
CityBurlington, VT
Period17.07.201122.07.2011

Keywords

  • CFRP
  • Finite Element Method
  • Heat Conduction Model
  • Porosity
  • Pulsed Thermography

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