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Induction-Excited Thermography — a Method to Visualize Defects in Semi-Structural Adhesive Bonds of Car Body Structures

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Abstract

State-of-the-art automobile production uses semi-structural adhesive bonding to join hybrid materials, Examples of application in automobile production are sunroofs or windshields joined to the bodywork. This paper presents the capabilities/benefits of induction-excited thermography for non-destructive testing of semi-structural adhesively bonded components, This new quality control method offers robust, contactless and extensive testing of these bonds by a visualization of thermal irregularities in an induction-excited thermal heat transfer, caused by defects in the adhesive, By a proper adaptation of inductive excitation the detection of various defects of the adhesive seam, like delaminations, neckings and also zero volume defects, both at small sized specimen and at a large-surfaced reference application were realized.

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Authors and Affiliations

  1. Institute of Joining and Welding (ifs), University of Braunschweig, Braunschweig, Germany

    Christian Srajbr &  Klaus Dilger

  2. Institute for Machine Tools and Manufacturing Technology (iwb), Technische Universität München, Augsburg, Germany

    Christian Thiemann &  Michael Zäh

Authors
  1. Christian Srajbr
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  2. Christian Thiemann
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  3. Michael Zäh
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  4. Klaus Dilger
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Correspondence to Christian Srajbr.

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Srajbr, C., Thiemann, C., Zäh, M. et al. Induction-Excited Thermography — a Method to Visualize Defects in Semi-Structural Adhesive Bonds of Car Body Structures. Weld World 56, 126–132 (2012). https://doi.org/10.1007/BF03321343

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