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M 2022 Inelastic Deformation of Coronary Stents - Two-Level Model.pdf (4.67 MB)

Inelastic deformation of coronary stents: Two-level model

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journal contribution
posted on 2022-10-14, 14:09 authored by Pavel S Volegov, Nikita A Knyazev, Roman M Gerasimov, Vadim SilberschmidtVadim Silberschmidt
This study describes the internal structure of materials used to produce medical stents. A two-level elastoviscoplastic mathematical model, which sets the parameters and describes the processes at the grain level, was developed and numerically implemented. A separate study was conducted to identify the most dangerous deformation modes in the balloon-expandable stent placement using the finite-element method in COMSOL Multiphysics. As a result, the challenging strain state type required for setting the kinematic loading on a representative macrovolume in the two-level model was obtained. A yield surface for different deformation paths in the principal deformation space for stainless steel AISI 316L was obtained and the effect of grain size on the deformation behavior of this material was explored using the developed model.

Funding

Perm National Research Polytechnic University

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Materials

Volume

15

Issue

19

Publisher

MDPI

Version

  • VoR (Version of Record)

Rights holder

© The authors

Publisher statement

This article is an Open Access article published by MDPI and distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/4.0/).

Acceptance date

2022-10-03

Publication date

2022-10-07

Copyright date

2022

eISSN

1996-1944

Language

  • en

Depositor

Prof Vadim Silberschmidt. Deposit date: 13 October 2022

Article number

6948

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