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Nondestructive Testing

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Handbook of Adhesion Technology

Abstract

The objective of any system of nondestructively examining an adhesive joint is to obtain a direct correlation between the strength of the joint (howsoever defined) and some mechanical, physical, or chemical parameter which can readily be measured without causing damage to the joint. Faults may be defined as anything which could adversely affect the short- or long-term strength of a joint. There are two basic areas for examination in properly made joints, the cohesive strength of the polymeric adhesive and the adhesive strength of the bond between the polymer and the substrate. In addition, voids, disbonds, and porosities create an additional issue for inspection.

During the production phase, and also in service with critical structures, it is essential to use nondestructive tests to assess the quality and fitness for purpose of the product. The nondestructive test will not measure strength directly but will measure a parameter which can be correlated to strength. It is, therefore, essential that a suitable nondestructive test is chosen and that its results are correctly interpreted. Typical defects found in adhesive joints are described and an indication given of their significance. The limits and likely success of current physical nondestructive tests will be described and future trends outlined.

It is shown that a variety of techniques are available for disbond detection, ultrasonics, and different types of bond tester being the most commonly used. These techniques are very time-consuming, especially if large bond areas are to be tested. Monitoring interfacial properties is much more difficult, and there is currently no reliable test after the joint is made although there are some indications of a possible way forward using high-powered lasers.

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Author information

Authors and Affiliations

  1. Department of Engineering Science, University of Oxford, Parks Road, OX1 3PJ, Oxford, UK

    Robert D. Adams

  2. Department of Mechanical Engineering, University of Bristol, Queen’s Building, University Walk, BS8 1TR, Bristol, UK

    Robert D. Adams

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  1. Robert D. Adams
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Correspondence to Robert D. Adams .

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Editors and Affiliations

  1. Department of Mechanical Engineering, Faculty of Engineering of the University of Porto, Porto, Portugal

    Lucas F. M. da Silva

  2. Faculty of Mechanical Engineering, Esslingen University of Applied Sciences, Esslingen, Baden-Württemberg, Germany

    Andreas Oechsner

  3. Department of Mechanical Engineering, University of Bristol, Bristol, United Kingdom

    Robert Adams

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Adams, R.D. (2017). Nondestructive Testing. In: da Silva, L., Oechsner, A., Adams, R. (eds) Handbook of Adhesion Technology. Springer, Cham. https://doi.org/10.1007/978-3-319-42087-5_42-2

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  • DOI: https://doi.org/10.1007/978-3-319-42087-5_42-2

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-42087-5

  • Online ISBN: 978-3-319-42087-5

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