Journal
EXPERIMENTAL MECHANICS
Volume 46, Issue 6, Pages 789-803Publisher
SPRINGER
DOI: 10.1007/s11340-006-9824-8
Keywords
digital image correlation; localization; resolution; texture; uncertainty
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A new methodology is proposed to estimate displacement fields from pairs of images (reference and strained) that evaluates continuous displacement fields. This approach is specialized to a finite-element decomposition, therefore providing a natural interface with a numerical modeling of the mechanical behavior used for identification purposes. The method is illustrated with the analysis of Portevin-Le Chatelier bands in an aluminum alloy sample subjected to a tensile test. A significant progress with respect to classical digital image correlation techniques is observed in terms of spatial resolution and uncertainty.
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