THE USE OF DIGITAL IMAGE CORRELATION IN THE STUDY OF ACHILLES TENDON STRAIN FIELD

Krzysztof Holak, Piotr Kohut, Andrzej Młyniec, Martyna Ekiert, Krzysztof Tomaszewski, Tadeusz Uhl

Abstract


The paper presents an application of vision-based measurement method in experimental mechanics of biological materials.  The displacement and strain fields of human Achilles tendon specimen under tensile test were computed using digital image correlation method. Different software applications, both commercial as well as open source ones, were compared. The performance of algorithms was tested based on a referential measurement, carried out by a commercial software with affine model of deformation implemented. The root mean square error of a difference between strain obtained using reference measurement and each of the analyzed programs was computed. Additionally,  an example of full field computation of displacement and strain field was presented.


Keywords


measurement vision systems; digital image correlation; biomechanical measurements; human Achilles tendon

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References


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DOI: https://doi.org/10.7494/mech.2015.34.1.19

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