Characterizing the mechanical performance of a bare-metal stent with an auxetic cell geometry
Date
2022
Authors
Bhullar, Sukhwinder K
Lekesiz, Huseyin
Karaca, Ahmet Abdullah
Cho, Yonghyun
Willerth, Stephanie M.
Jun, Martin B. G.
Journal Title
Journal ISSN
Volume Title
Publisher
Applied Sciences
Abstract
This study develops and characterizes the distinctive mechanical features of a stainless-steel
metal stent with a tailored structure. A high-precision femtosecond laser was used to micromachine a
stent with re-entrant hexagonal (auxetic) cell geometry. We then characterized its mechanical behavior
under various mechanical loadings using in vitro experiments and through finite element analysis.
The stent properties, such as the higher capability of the stent to bear upon bending, exceptional
advantage at elevated levels of twisting angles, and proper buckling, all ensured a preserved opening
to maintain the blood flow. The outcomes of this preliminary study present a potential design for a
stent with improved physiologically relevant mechanical conditions such as longitudinal contraction,
radial strength, and migration of the stent.
Description
Keywords
stent design, mechanical behavior, mechanical loadings, radial strength, longitudinal flexibility longitudinal/lateral compressive resistance, bending, twisting
Citation
Bhullar, S., Lekesiz, H., Karaca, A., Cho, Y., Willerth, S., & Jun, M. (2022). “Characterizing the mechanical performance of a bare-metal stent with an auxetic cell geometry.” Applied Sciences, 12(2), 910. https://doi.org/10.3390/app12020910