Experimental validation of auxetic stent designs: three-point bending of 3D printed Titanium prototypes - Mines Saint-Étienne
Journal Articles Frontiers in Medical Technology Year : 2024

Experimental validation of auxetic stent designs: three-point bending of 3D printed Titanium prototypes

Abstract

Introduction Numerical simulations have demonstrated the superior bending flexibility of auxetic stents compared to conventional stent designs for endovascular procedures. However, conventional stent manufacturing techniques struggle to produce complex auxetic stent designs, fueling the adoption of additive manufacturing techniques. Methods In this study, we employed DMLS additive manufacturing to create Titanium Ti64 alloy stent prototypes based on auxetic stent designs investigated in a previous study. These prototypes were then subjected to experimental three-point bending tests. Result The experimental results were replicated using a finite element model, which showed remarkable accuracy in predicting the bending flexibility of four auxetic stents and two conventional stents. Discussion Although this validation study demonstrates the promising potential of DMLS and other additive manufacturing methods for fabricating auxetic stents, further optimization of current stent design limitations and the incorporation of post-processing techniques are essential to enhance the reliability of these additive manufacturing processes.

Dates and versions

emse-04809891 , version 1 (28-11-2024)

Identifiers

Cite

Rahul Vellaparambil, Woo-Suck Han, Pierluigi Di Giovanni, Stéphane Avril. Experimental validation of auxetic stent designs: three-point bending of 3D printed Titanium prototypes. Frontiers in Medical Technology, 2024, 6, ⟨10.3389/fmedt.2024.1388207⟩. ⟨emse-04809891⟩
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