Title: Effect of DIC Spatial Resolution, Noise and Interpolation Error on Identification Results with the VFM
Authors: Rossi, Marco ×
Lava, Pascal
Pierron, Fabrice
Debruyne, Dimitri
Sasso, Marco #
Issue Date: Mar-2015
Publisher: Wiley-Blackwell Publishing, Inc.
Series Title: Strain vol:51 issue:3 pages:206-222
Article number: 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.
ISSN: 1475-1305
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Materials Technology TC, Technology Campuses Ghent and Aalst
Technologiecluster Materialentechnologie
× corresponding author
# (joint) last author

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