Alsayednoor, J., Harrison, P. , Dobbie, M., Costantini, R. and Lennard, F. (2019) Evaluating the use of digital image correlation for strain measurement in historic tapestries using representative deformation fields. Strain, 55(2), e12308. (doi: 10.1111/str.12308)
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Abstract
An analysis technique to assess the viability of digital image correlation (DIC) in tracking the full‐field strains across the surface of hanging historic tapestries is presented. Measurement uncertainty related to the use of the inherent tapestry image in tracking displacements is investigated through use of “synthetic” deformation fields. The latter are generated by mapping the details of a given tapestry image into finite element analyses. The combination of self‐weight loading, material non‐linearity, and image specific heterogeneity (related to slit stitching, damage, and patch‐restorations) serve to generate a bespoke deformation field complex enough to assess the reliability of DIC measurements. Accuracy is evaluated by comparing measured results with the original known deformations. The technique demonstrates that the optimum imaging settings and the choice of subset size for DIC analysis are strongly influenced by the tapestry image and the goal of the measurement, they are found using a compromise between conflicting objectives: minimising measurement error while maximising resolution.
| Item Type: | Articles |
|---|---|
| Additional Information: | The authors wish to thank the Leverhulme Trust for the grant ‘From the Golden Age to the Digital Age: Modelling and Monitoring Historic Tapestries’, (Ref: RPG-2015-179). |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Alsayednoor, Dr Jafar and Lennard, Professor Frances and Harrison, Dr Philip and Costantini, Rosa |
| Authors: | Alsayednoor, J., Harrison, P., Dobbie, M., Costantini, R., and Lennard, F. |
| College/School: | College of Arts & Humanities > School of Culture and Creative Arts > History of Art 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: | 11 February 2019 |
| Copyright Holders: | Copyright © 2019 John Wiley and Sons Ltd |
| First Published: | First published in Strain 55:e12308 |
| Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
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