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A FEM Study of Mechanical Behavior of S-Shaped-Stent

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Contemporary Methods in Bioinformatics and Biomedicine and Their Applications (BioInfoMed 2020)

Part of the book series: Lecture Notes in Networks and Systems ((LNNS,volume 374))

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Abstract

The paper presents results of simulations of mechanical behavior of S-shaped stents of different lengths.

The mechanical behavior of the stent strongly depends on the stent strut topology and the material properties. The presented stent strut topology differs from the known devices, usually used in the angioplasty. The aim of the study is to suggest a different stent topology and design and to model, simulate and compare its mechanical behavior and parameters with other clinically used stents.

The suggested stent design approach is based on the Escher tessellation, consisting in periodic tiling of a specific shape pattern without gapes and/or overlaps. As a result, the array of multiplied slot patterns forms the desired stent struts and the S-formed bridges. The method enables generation of variety of new and unique stent geometries.

The following mechanical properties of the bare metal stent (medical stainless-steel Grade 316L) are estimated: recoil, foreshortening, dogboning as well as critical stresses and they are compared with commercial stents. All graphical modelling and computer simulations are performed using SolidWorks and COMSOL Multiphysics.

Unlike the traditional stents the stents of suggested design show unexpected negative values of dogboning. All other parameters are comparable.

The results of the modelling and simulation open room for further design, new stent properties and new design algorithms.

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Acknowledgements

The used software COMSOL Multiphysics 5.5 and the license have been delivered under Project BG05M2OP001-1.001-0008 “National Centre for Mechatronics and Clean Technologies”, funded by Operational Program “Science and Education for Smart Growth” 2014–2020.

The authors gratefully appreciate the support of the Management of the Project, as well as of the Operational Program “Science and Education for Smart Growth” 2014–2020.

The supplying of technical and constructive documentation of the stent by ISMA EOOD is highly acknowledged.

Author information

Authors and Affiliations

  1. Faculty of Mechanical Engineering, Department of Precision Engineering and Measurement, Technical University of Sofia, 8 Kl. Ochridski Blvd, 1000, Sofia, Bulgaria

    Mihail Mihalev

  2. Faculty of Physics, Department of Optics, Sofia University “St. Klimen Ochridski”, 5. J. Bourchier Blvd, Sofia, Bulgaria

    Lilia Vladimirova-Mihaleva

  3. Faculty of Applied Mathematics and Informatics, Department of Physics, Technical University of Sofia, 8 Kl. Ochridski Blvd, 1000, Sofia, Bulgaria

    Chavdar Hardalov

  4. Faculty of Automatics, Department of Electrical Motion Automation Systems, Technical University of Sofia, 8 Kl. Ochridski Blvd, 1000, Sofia, Bulgaria

    Docho Tsankov

Authors
  1. Mihail Mihalev
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  2. Lilia Vladimirova-Mihaleva
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  3. Chavdar Hardalov
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  4. Docho Tsankov
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Corresponding author

Correspondence to Mihail Mihalev .

Editor information

Editors and Affiliations

  1. Faculty of Technical Sciences, University Prof. D-r Asen Zlatarov, Burgas, Bulgaria

    Sotir S. Sotirov

  2. Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria

    Tania Pencheva

  3. Systems Research Institute, Polish Academy of Sciences, Warsaw, Poland

    Janusz Kacprzyk

  4. Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria

    Krassimir T. Atanassov

  5. Intelligent Systems Laboratory, University Prof. D-r Asen Zlatarov, Burgas, Bulgaria

    Evdokia Sotirova

  6. Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria

    Galya Staneva

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Mihalev, M., Vladimirova-Mihaleva, L., Hardalov, C., Tsankov, D. (2022). A FEM Study of Mechanical Behavior of S-Shaped-Stent. In: Sotirov, S.S., Pencheva, T., Kacprzyk, J., Atanassov, K.T., Sotirova, E., Staneva, G. (eds) Contemporary Methods in Bioinformatics and Biomedicine and Their Applications. BioInfoMed 2020. Lecture Notes in Networks and Systems, vol 374. Springer, Cham. https://doi.org/10.1007/978-3-030-96638-6_36

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  • DOI: https://doi.org/10.1007/978-3-030-96638-6_36

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-96637-9

  • Online ISBN: 978-3-030-96638-6

  • eBook Packages: EngineeringEngineering (R0)

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