1
Nanotechnology and Advanced Materials Department, Materials and Energy Research Center (MERC), Karaj, Iran, P.O. Box 316-31787, Tel (Fax):(+98)2636201888
2
Arak University,Arak,Iran
10.22044/jsfm.2025.16437.3983
Abstract
Smart stents made from the shape memory alloy Nitinol are expanding in the medical field due to their unique properties, including temperature-dependent shape change and superelasticity. Predicting the behavior of these stents prior to fabrication can significantly reduce surgical and therapeutic risks and improve treatment processes. This study investigates and predicts the behavior of three types of stents (Smart Flex, Tigris, Viabahn) using the finite element analysis method. The analyses were conducted under torsion loading and at appropriate temperatures to examine superelastic behavior. The results obtained from the Auricchio model, used to describe the material properties of Nitinol in the Abaqus software, showed that the Flex Smart stent performed best in terms of Effective strain (0.05889), displacement (0.04943 m), stress (528.4 Pa), low force (266.9 N), Percentage of martensite (0.8001), and a large hysteresis loop (radial and circumferential force). The simulation results also revealed that the Smart Flex stent had the highest amount of twist and torsional moment (4.652 Nm), outperforming the other two models (Tigris & Viabahn). In the evaluation of simulation results and comparative analysis between the Tigris, Flex Smart, and Viabahn stents under torsional loading, the Tigris stent demonstrated the highest agreement with experimental results, with a difference of 23.22%. In contrast, the Smart Flex and Viabahn stents showed lower conformity with experimental data, with differences of 34.78% and 57.71%, respectively.
Nematzadeh, F. , Zolfaghari, M. , Eskini, B. and Eskini, A. (2025). Computational Study of the Effect of Torsional Loading on the Behavior of Nitinol Stents in the Femoropopliteal Artery. Journal of Solid and Fluid Mechanics, 15(5), -. doi: 10.22044/jsfm.2025.16437.3983
MLA
Nematzadeh, F. , , Zolfaghari, M. , , Eskini, B. , and Eskini, A. . "Computational Study of the Effect of Torsional Loading on the Behavior of Nitinol Stents in the Femoropopliteal Artery", Journal of Solid and Fluid Mechanics, 15, 5, 2025, -. doi: 10.22044/jsfm.2025.16437.3983
HARVARD
Nematzadeh, F., Zolfaghari, M., Eskini, B., Eskini, A. (2025). 'Computational Study of the Effect of Torsional Loading on the Behavior of Nitinol Stents in the Femoropopliteal Artery', Journal of Solid and Fluid Mechanics, 15(5), pp. -. doi: 10.22044/jsfm.2025.16437.3983
CHICAGO
F. Nematzadeh , M. Zolfaghari , B. Eskini and A. Eskini, "Computational Study of the Effect of Torsional Loading on the Behavior of Nitinol Stents in the Femoropopliteal Artery," Journal of Solid and Fluid Mechanics, 15 5 (2025): -, doi: 10.22044/jsfm.2025.16437.3983
VANCOUVER
Nematzadeh, F., Zolfaghari, M., Eskini, B., Eskini, A. Computational Study of the Effect of Torsional Loading on the Behavior of Nitinol Stents in the Femoropopliteal Artery. Journal of Solid and Fluid Mechanics, 2025; 15(5): -. doi: 10.22044/jsfm.2025.16437.3983
)