Investigating the accuracy of digital image correlation in monitoring strain fields across historical tapestries

Nwanoro, K., Harrison, P. and Lennard, F. (2022) Investigating the accuracy of digital image correlation in monitoring strain fields across historical tapestries. Strain, 58(1), e12401. (doi: 10.1111/str.12401)

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Abstract

Finite element generated synthetic image deformation is used to assess factors affecting the reliability and accuracy of strain fields measured by the DIC technique, when using the inherent historical tapestry image to track deformations. Compared with direct correlation with the reference image, incremental correlation is found to introduce accumulated error and is less suitable for DIC analysis under low strains. Image quality, for example, variation in resolution, is demonstrated to strongly affect DIC performance. Finally, it is recommended that an iterative approach is required to determine the optimum subset and strain filter size for effective DIC analysis using inherent tapestry patterns, especially at low strain levels.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Nwanoro, Mr Kenneth and Lennard, Professor Frances and Harrison, Dr Philip
Authors: Nwanoro, K., Harrison, P., and Lennard, F.
College/School:College of Arts > School of Culture and Creative Arts
College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Strain
Publisher:Wiley
ISSN:0039-2103
ISSN (Online):1475-1305
Published Online:13 September 2021
Copyright Holders:Copyright © 2021 John Wiley and Sons Ltd
First Published:First published in Strain 58(1): e12401
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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