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Article | REF: R1850 V2

Mechanical measurements using optical methods

Authors: Fabrice BRÉMAND, Mario COTTRON, Pascal DOUMALIN, Jean-Christophe DUPRÉ, Arnaud GERMANEAU, Valéry VALLE

Publication date: June 10, 2011

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3. Digital image correlation

3.1 2D-2C analysis

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3.1.1 Principle, displacement measurement

The correlation technique (figure 7 ) consists in matching two digital images of the view of an object's plane surface, in two distinct states of deformation, a so-called "reference" state and a so-called "deformed" state. Matching is carried out on sub-domains of the images, forming a virtual grid of measurement points. For each sub-domain D whose position

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Digital image correlation
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