DIC strain measurement on the full-surface of an artery analogue after stent deployment

K Genovese^a, A Montes^b, J A Rayas^c and Amalia Martínez-García^c
aSchool of Engineering, University of Basilicata, Potenza, Italy
^bBenemérita Universidad Autónoma de Puebla, Puebla, México
^cCentro de Investigaciones en Óptica, A. C. Loma del Bosque 115, C.P. 37150, León, Guanajuato, México

This article is dedicated to Professor Cesar Sciammarella

Digital Image Correlation (DIC) is a widely used optical method for measuring full-field shape, motion and deformation on the surface and within the volume of solid bodies under load. Its popularity is due to its capability of obtaining highly dense set of data for a large range of length scales and deformation levels. The contactless and full-field capabilities of DIC make it particularly suitable for studying the spatially varying material properties of natural and synthetic biological materials.
In this work, we illustrate the potentialities of DIC measurements by mapping the strain induced by the deployment of a self-expandable stent into a latex tube. A non-conventional DIC optical arrangement and data processing was adopted to cope with the cylindrical shape of the sample and with the large deformation exerted by the stent.
Experimental results show the capability of DIC to map high-resolution and seamless strain data over the full surface of the mock artery. Interestingly, although the stent was deployed into a regular cylindrical tube, the resulting deformation was inhomogeneous and asymmetric. This highlights the impact that this type of experimental data may have in the study of the stent-arterial wall interaction. © Anita Publications. All rights reserved.
Keywords: Aortic stent, Digital image correlation, 360-deg full-surface measurement, full-field strain map

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Method: Single- anonymous; Screened for Plagiarism? Yes
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