Speckle patterns for DIC in challenging scenarios: Rapid application and impact endurance

Gustavo Quino*, Yanhong Chen, Karthik Ram Ramakrishnan, Francisca Martínez-Hergueta, Giuseppe Zumpano, Antonio Pellegrino, Nik Petrinic

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

1 Citation (Scopus)

Abstract

Digital image correlation (DIC) is a widely used technique in experimental mechanics for full field measurement of displacements and strains. The subset matching based DIC requires surfaces containing a random pattern. Even though there are several techniques to create random speckle patterns, their applicability is still limited. For instance, traditional methods such as airbrush painting are not suitable in the following challenging scenarios: (i) when time available to produce the speckle pattern is limited and (ii) when dynamic loading conditions trigger peeling of the pattern. The development and application of some novel techniques to address these situations is presented in this paper. The developed techniques make use of commercially available materials such as temporary tattoo paper, adhesives and stamp kits. The presented techniques are shown to be quick, repeatable, consistent and stable even under impact loads and large deformations. Additionally, they offer the possibility to optimise and customise the speckle pattern. The speckling techniques presented in the paper are also versatile and can be quickly applied in a variety of materials.

Original languageEnglish
Article number015203
JournalMeasurement Science and Technology
Volume32
Issue number1
DOIs
Publication statusPublished - Jan 2021

Bibliographical note

Publisher Copyright:
© 2020 The Author(s). Published by IOP Publishing Ltd.

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

Keywords

  • DIC
  • experimental mechanics
  • impact
  • speckle pattern

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