Vol. 20 No. 1 (2023): Journal of Non Destructive Testing and Evaluation (JNDE), March 2023
Research Papers

Pulsed Thermal NDT of Material Discontinuities by Using the Concept of Equivalent Effusivity/Diffusivity Variations

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  • A. O. Siddiqui,
  • Y.L.V.D. Prasad,
  • V.P. Vavilov,
  • D. Yu. Kladov
A. O. Siddiqui
Advanced Systems Laboratory, Kanchanbagh P.O., Hyderabad 500058
Y.L.V.D. Prasad
Advanced Systems Laboratory, Kanchanbagh P.O., Hyderabad 500058
V.P. Vavilov
National Research Tomsk Polytechnic University 634050 Tomsk, Lenin Av., 30, Russia
D. Yu. Kladov
National Research Tomsk Polytechnic University 634050 Tomsk, Lenin Av., 30, Russia

Published 12-03-2023

Keywords

  • Nondestructive testing,
  • Infrared thermography,
  • Defect,
  • Diffusivity,
  • Effusivity

How to Cite

Siddiqui, A. O. ., Prasad, Y., Vavilov, V. ., & Kladov, D. Y. . (2023). Pulsed Thermal NDT of Material Discontinuities by Using the Concept of Equivalent Effusivity/Diffusivity Variations. Journal of Non-Destructive Testing and Evaluation (JNDE), 20(1), 29–37. Retrieved from https://jnde.isnt.in/index.php/JNDE/article/view/31

Copyright (c) 2023 Journal of Non-Destructive Testing and Evaluation (JNDE)

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Abstract

Subsurface material discontinuities lead to local variations of apparent thermal effusivity and diffusivity. The analysis of equivalence between such variations and defect parameters is useful from both theoretical and practical points of view. Classical heat conduction solutions contain effusivity/diffusivity as important parameters, which can be used for defect characterization.  Also, conversion of temperature images into maps of thermal propertiesmay enhance defect visibility, for example, by transiting from the temperature domain into the time domain, as it appears in the case of diffusivity measurement. A 60J impact damage in carbon fiber reinforced polymer is characterized by effusivity/diffusivity variation from 20 to 40 %.

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References

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