Effect of DIC spatial resolution, noise and interpolation error on identification results with the VFM
Effect of DIC spatial resolution, noise and interpolation error on identification results with the VFM
The use of experimental tests that involve full-field measurements to characterize mechanical material properties is becoming more widespread within the engineering community. In particular digital image correlation (DIC) on white light speckles is one of the most used tools, thanks to the relatively low cost of the equipment and the availability of dedicated software. Nonetheless the impact of measurement errors on the identified parameters is still not completely understood. To this purpose, in this paper, a simulator able to numerically simulate an experimental test, which involves DIC is presented. The chosen test is the Unnotched Iosipescu test used to identify the orthotropic elastic parameters of composites. Synthetic images are generated and then analysed by DIC. Eventually the obtained strain maps are used to identify the elastic parameters with the Virtual Fields Method (VFM). The numerical errors propagating through the simulation procedure are carefully characterized. Besides, the simulator is used to compare the performances of DIC and the grid method in the identification process with the VFM. Finally, the influence of DIC settings on the identification error is studied as a function of the camera digital noise level, in order to find the best testing configuration.
206-222
Rossi, M.
bfeecd16-516a-414d-b97d-a4c03ca384ac
Lava, P.
66113c15-d51e-47a7-bd3e-263f25474f41
Pierron, F.
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Debruyne, D.
3e7b61de-00be-4219-831f-4855e1c7ace7
Sasso, M.
e9f310eb-c76b-43fb-8c97-1f89a5027dbb
Rossi, M.
bfeecd16-516a-414d-b97d-a4c03ca384ac
Lava, P.
66113c15-d51e-47a7-bd3e-263f25474f41
Pierron, F.
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
Debruyne, D.
3e7b61de-00be-4219-831f-4855e1c7ace7
Sasso, M.
e9f310eb-c76b-43fb-8c97-1f89a5027dbb
Rossi, M., Lava, P., Pierron, F., Debruyne, D. and Sasso, M.
(2015)
Effect of DIC spatial resolution, noise and interpolation error on identification results with the VFM.
Strain, 51 (3), .
(doi:10.1111/str.12134).
Abstract
The use of experimental tests that involve full-field measurements to characterize mechanical material properties is becoming more widespread within the engineering community. In particular digital image correlation (DIC) on white light speckles is one of the most used tools, thanks to the relatively low cost of the equipment and the availability of dedicated software. Nonetheless the impact of measurement errors on the identified parameters is still not completely understood. To this purpose, in this paper, a simulator able to numerically simulate an experimental test, which involves DIC is presented. The chosen test is the Unnotched Iosipescu test used to identify the orthotropic elastic parameters of composites. Synthetic images are generated and then analysed by DIC. Eventually the obtained strain maps are used to identify the elastic parameters with the Virtual Fields Method (VFM). The numerical errors propagating through the simulation procedure are carefully characterized. Besides, the simulator is used to compare the performances of DIC and the grid method in the identification process with the VFM. Finally, the influence of DIC settings on the identification error is studied as a function of the camera digital noise level, in order to find the best testing configuration.
Text
Manuscript_Strain_final.pdf
- Accepted Manuscript
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e-pub ahead of print date: 24 March 2015
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 378152
URI: http://eprints.soton.ac.uk/id/eprint/378152
ISSN: 1475-1305
PURE UUID: 8ad82be5-5136-4cd2-a463-b2dd8e8493ab
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Date deposited: 25 Jun 2015 12:40
Last modified: 15 Mar 2024 03:35
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Author:
M. Rossi
Author:
P. Lava
Author:
D. Debruyne
Author:
M. Sasso
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