Application of digital image correlation to the thick adherend shear test

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1007/978-3-319-42426-2_9
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Name affiliation
  1. National Research Council of Canada. Aerospace
FormatText, Book chapter
Proceedings titleJoining Technologies for Composites and Dissimilar Materials, Volume 10: Proceedings of the 2016 Annual Conference on Experimental and Applied Mechanics
Series titleConference Proceedings of the Society for Experimental Mechanics Series
Conference2016 Annual Conference on Experimental and Applied Mechanics, Orlando, Florida, USA
ISSN2191-5644
2191-5652
ISBN978-3-319-42425-5
978-3-319-42426-2
Pages81–90
Subjectadhesives; mechanical properties; single-lap joint; digital image correlation (DIC); KGR-1 extensometer; experimental test methods
Abstract
The purpose of this study was to develop and validate a novel method for measuring shear deformation during the Thick Adherend Shear Test (TAST), to determine in situ mechanical properties of an adhesive under tensile shear loading, using two-dimensional (2D) Digital Image Correlation (DIC). Shear strains were optically measured using DIC from the bond line and also from adherend deformations; both were compared against measurements made using the ASTM D5656 standard (KGR-1 extensometers). The results from 17 TAST specimens showed that all techniques were in good agreement, however, both DIC techniques had significantly lower variance on measured mechanical properties compared to the KGR-1 extensometers. The use of correlated adherend deformations was the preferred technique for deriving plastic shear strains, and overall produced the lowest scatter on mechanical properties. This study demonstrates the potential for the use of 2D DIC as a more precise, and time-efficient alternative to the KGR-1 extensometers for room temperature in situ characterization of adhesives in shear.
Publication date
PublisherSpringer
Springer
LanguageEnglish
Peer reviewedYes
NPARC number23002607
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