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Polynomial Fitting Techniques for IRT Inspection

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Residual Stress, Thermomechanics & Infrared Imaging, Hybrid Techniques and Inverse Problems, Volume 8

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Abstract

This paper discusses the use of polynomial surface fitting techniques for the infrared thermography (IRT) evaluation of the graphite epoxy composite laminate. The composite laminate had 12 inserted Teflon films in different layers so as to simulate delamination defects. Based on the initial IRT inspection, it was determined that the raw IR images were not able to detect all 12 defects. In order to improve the detection capability and remove the heating pattern, a fitted heating pattern was generated by using the polynomial surface fitting method. Then, this pattern was deleted by applying the subtract function. It was demonstrated that this applied method not only removed the non-uniform heating effect, but also preserved all defect information and enhanced the thermal contrast of the raw IR images.

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Author information

Authors and Affiliations

  1. Department of Electrical and Computer Engineering, Southern Illinois University Carbondale, 1230 Lincoln Drive, Carbondale, IL, 62901, USA

    Shanglei Li

  2. Department of Mechanical Engineering and Energy Process, Southern Illinois University Carbondale, 1230 Lincoln Drive, Carbondale, IL, 62901, USA

    Anish Poudel & Tsuchin Philip Chu

Authors
  1. Shanglei Li
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  2. Anish Poudel
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  3. Tsuchin Philip Chu
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Corresponding author

Correspondence to Shanglei Li .

Editor information

Editors and Affiliations

  1. Università Politecnica delle Marche, Ancona, Italy

    Marco Rossi

  2. Università Politecnica delle Marche, Ancona, Italy

    Marco Sasso

  3. University of Joseph Fourier, Grenoble, France

    Nathanael Connesson

  4. Oklahoma State University, Tulsa, Oklahoma, USA

    Raman Singh

  5. Hill Engineering, LLC, Rancho Cordova, California, USA

    Adrian DeWald

  6. National Research Council Canada, Ottawa, Canada

    David Backman

  7. Cummins, Inc., Columbus, Indiana, USA

    Paul Gloeckner

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© 2014 The Society for Experimental Mechanics, Inc.

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Li, S., Poudel, A., Chu, T.P. (2014). Polynomial Fitting Techniques for IRT Inspection. In: Rossi, M., et al. Residual Stress, Thermomechanics & Infrared Imaging, Hybrid Techniques and Inverse Problems, Volume 8. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-00876-9_42

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  • DOI: https://doi.org/10.1007/978-3-319-00876-9_42

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-00875-2

  • Online ISBN: 978-3-319-00876-9

  • eBook Packages: EngineeringEngineering (R0)

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