Effect of the mesh size of the vector displacement field on the strain estimate in the digital image correlation method
- Autores: Panin S.1,2, Titkov V.1, Lyubutin P.1,2
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Afiliações:
- Institute of Strength Physics and Material Science, Siberian Branch
- National Research Tomsk Polytechnical University
- Edição: Volume 58, Nº 3 (2017)
- Páginas: 425-434
- Seção: Article
- URL: https://journals.rcsi.science/0021-8944/article/view/160082
- DOI: https://doi.org/10.1134/S0021894417030075
- ID: 160082
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Resumo
The influence of the mesh size of the displacement vector field on the strain estimate in the digital image correlation method is considered. The reasons for the emergence and the magnitude of the strain estimate error in processing optical images of material surfaces with different textures are analyzed. The dependence of the mesh size for strain estimation on the magnitude of displacements and also on the presence and size of the discontinuity region in the strain field is studied. An adaptive algorithm for choosing the mesh size is proposed, which allows the strain calculation error to be reduced by a factor of 1.9 with simultaneous reduction of computational expenses by a factor of 2.1.
Sobre autores
S. Panin
Institute of Strength Physics and Material Science, Siberian Branch; National Research Tomsk Polytechnical University
Autor responsável pela correspondência
Email: svp@ispms.tsc.ru
Rússia, Tomsk, 634055; Tomsk, 634050
V. Titkov
Institute of Strength Physics and Material Science, Siberian Branch
Email: svp@ispms.tsc.ru
Rússia, Tomsk, 634055
P. Lyubutin
Institute of Strength Physics and Material Science, Siberian Branch; National Research Tomsk Polytechnical University
Email: svp@ispms.tsc.ru
Rússia, Tomsk, 634055; Tomsk, 634050