A new digital image correlation algorithm for whole-field displacement measurement
Name
IMST015.pdf
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791.97 KB
Format
Adobe PDF
Checksum (MD5)
094d20e06b9e26e615f89aca8f92753d
Author(s)
Su, C.
Anand, Lallit
Date Issued
January 2003
Series/Report no.
Innovation in Manufacturing Systems and Technology (IMST);
Abstract
We have developed a new digital image correlation (DIC) algorithm for non-contact, two-dimensional, whole-field displacement and strain measurement. Relative to existing algorithms, our algorithm substantially reduces the calculation expense by using neighborhood information while processing the data to determine the displacement field in a sub-region of interest. The new algorithm also uses higher-order interpolations of the displacement field, allowing for better accuracy in estimating strain distributions when the deformation field is non-homogeneous. Numerically-generated digital images are used to show that the new algorithm accurately reproduces the imposed displacement fields. The algorithm is also tested on actual images from deformed specimens from a variety of experiments, and shown to perform satisfactorily.
Subjects
experimental mechanics
non-contact strain measurement
mechanical testing
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