Details
| Original language | English |
|---|---|
| Pages (from-to) | 265-280 |
| Number of pages | 16 |
| Journal | Comptes Rendus Mécanique (Online) |
| Volume | 351 |
| Early online date | 10 Jul 2023 |
| Publication status | Published - 2023 |
Abstract
In-situ (tomography) experiments are generally based on scans reconstructed from a large number of projections acquired under constant deformation of samples. Standard digital volume correlation (DVC) methods are based on a limited number of scans due to acquisition duration. They thus prevent analyses of time-dependent phenomena. In this paper, a modal procedure is proposed that allows time-dependent occurrences to be analyzed. It estimates spacetime displacement fields during the whole loading history. The spatial modes are based on standard DVC, which is subsequently enriched using projection-based digital volume correlation (P-DVC) to measure the temporal amplitudes. The method is applied to two cases, namely, a virtual experiment mimicking wedge splitting and an actual shear test on a pantographic metamaterial inducing large motions. With the proposed method, the temporal amplitude in the real test was measured for each projection leading to a temporal resolution of one tenth of a second and the analysis of 16,400 time steps. For the proposed algorithm, the sensitivity to the acquisition angle of the sample was investigated and measurement uncertainties were assessed.
Keywords
- Digital volume correlation (DVC), in-situ tests, spacetime analyses, tomography
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Mechanics of Materials
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In: Comptes Rendus Mécanique (Online), Vol. 351, 2023, p. 265-280.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A projection-based approach to extend digital volume correlation for 4D spacetime measurements
AU - Kosin, Viktor
AU - Fau, Amélie
AU - Jailin, Clément
AU - Smaniotto, Benjamin
AU - Wick, Thomas
AU - Hild, François
N1 - Publisher Copyright: © 2023 Elsevier Masson SAS. All rights reserved.
PY - 2023
Y1 - 2023
N2 - In-situ (tomography) experiments are generally based on scans reconstructed from a large number of projections acquired under constant deformation of samples. Standard digital volume correlation (DVC) methods are based on a limited number of scans due to acquisition duration. They thus prevent analyses of time-dependent phenomena. In this paper, a modal procedure is proposed that allows time-dependent occurrences to be analyzed. It estimates spacetime displacement fields during the whole loading history. The spatial modes are based on standard DVC, which is subsequently enriched using projection-based digital volume correlation (P-DVC) to measure the temporal amplitudes. The method is applied to two cases, namely, a virtual experiment mimicking wedge splitting and an actual shear test on a pantographic metamaterial inducing large motions. With the proposed method, the temporal amplitude in the real test was measured for each projection leading to a temporal resolution of one tenth of a second and the analysis of 16,400 time steps. For the proposed algorithm, the sensitivity to the acquisition angle of the sample was investigated and measurement uncertainties were assessed.
AB - In-situ (tomography) experiments are generally based on scans reconstructed from a large number of projections acquired under constant deformation of samples. Standard digital volume correlation (DVC) methods are based on a limited number of scans due to acquisition duration. They thus prevent analyses of time-dependent phenomena. In this paper, a modal procedure is proposed that allows time-dependent occurrences to be analyzed. It estimates spacetime displacement fields during the whole loading history. The spatial modes are based on standard DVC, which is subsequently enriched using projection-based digital volume correlation (P-DVC) to measure the temporal amplitudes. The method is applied to two cases, namely, a virtual experiment mimicking wedge splitting and an actual shear test on a pantographic metamaterial inducing large motions. With the proposed method, the temporal amplitude in the real test was measured for each projection leading to a temporal resolution of one tenth of a second and the analysis of 16,400 time steps. For the proposed algorithm, the sensitivity to the acquisition angle of the sample was investigated and measurement uncertainties were assessed.
KW - Digital volume correlation (DVC)
KW - in-situ tests
KW - spacetime analyses
KW - tomography
UR - http://www.scopus.com/inward/record.url?scp=85167923548&partnerID=8YFLogxK
U2 - 10.5802/crmeca.192
DO - 10.5802/crmeca.192
M3 - Article
AN - SCOPUS:85167923548
VL - 351
SP - 265
EP - 280
JO - Comptes Rendus Mécanique (Online)
JF - Comptes Rendus Mécanique (Online)
SN - 1631-0721
ER -