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

Günther Mayr; Jürgen Gruber; Günther Hendorfer

doi:10.1063/1.4716334

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

Günther Mayr, Jürgen Gruber, Günther Hendorfer

Research output: Chapter in Book/Report/Conference proceedings › Conference contribution › peer-review

4 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 language	English
Title of host publication	Review of Progress in Quantitative Nondestructive Evaluation
Publisher	AIP Publishing
Pages	1025-1032
Number of pages	8
Edition	31
ISBN (Print)	9780735410138
DOIs	https://doi.org/10.1063/1.4716334
Publication status	Published - 2012
Event	38th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE - Burlington, VT, United States Duration: 17 Jul 2011 → 22 Jul 2011

Publication series

Name	AIP Conference Proceedings
Number	31
Volume	1430
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	38th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE
Country/Territory	United States
City	Burlington, VT
Period	17.07.2011 → 22.07.2011

Keywords

CFRP
Finite Element Method
Heat Conduction Model
Porosity
Pulsed Thermography

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10.1063/1.4716334

Cite this

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title = "Analytical and numerical computations of heat transfer in pulsed thermography applied to porous CFRP",

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.",

keywords = "CFRP, Finite Element Method, Heat Conduction Model, Porosity, Pulsed Thermography",

author = "G{\"u}nther Mayr and J{\"u}rgen Gruber and G{\"u}nther Hendorfer",

year = "2012",

doi = "10.1063/1.4716334",

language = "English",

isbn = "9780735410138",

series = "AIP Conference Proceedings",

publisher = "AIP Publishing",

number = "31",

pages = "1025--1032",

booktitle = "Review of Progress in Quantitative Nondestructive Evaluation",

edition = "31",

}

Mayr, G, Gruber, J & Hendorfer, G 2012, Analytical and numerical computations of heat transfer in pulsed thermography applied to porous CFRP. in Review of Progress in Quantitative Nondestructive Evaluation. 31 edn, AIP Conference Proceedings, no. 31, vol. 1430, AIP Publishing, pp. 1025-1032, 38th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE, Burlington, VT, United States, 17.07.2011. https://doi.org/10.1063/1.4716334

Analytical and numerical computations of heat transfer in pulsed thermography applied to porous CFRP. / Mayr, Günther; Gruber, Jürgen; Hendorfer, Günther.
Review of Progress in Quantitative Nondestructive Evaluation. 31. ed. AIP Publishing, 2012. p. 1025-1032 (AIP Conference Proceedings; Vol. 1430, No. 31).

Research output: Chapter in Book/Report/Conference proceedings › Conference contribution › peer-review

TY - GEN

T1 - Analytical and numerical computations of heat transfer in pulsed thermography applied to porous CFRP

AU - Mayr, Günther

AU - Gruber, Jürgen

AU - Hendorfer, Günther

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N2 - 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.

AB - 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.

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KW - Finite Element Method

KW - Heat Conduction Model

KW - Porosity

KW - Pulsed Thermography

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BT - Review of Progress in Quantitative Nondestructive Evaluation

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T2 - 38th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE

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

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