PSI - Issue 15

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 ScienceDirect

www.elsevier.com/locate/procedia

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 15 (2019) 24–27

© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of International Conference on Stents: Materials, Mechanics and Manufacturing ICS3M 2019. © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of International Conference on Stents: Materials, Mechanics and Manufacturing ICS3M 2019. calibrate against experimental results, were used to d scribe the stress-stretch sponses of art rial layers and plaqu . Ab qus CAE was used to create FE models or a femoral artery with non-uniform diffusive stenosis and a ni in l stent with a le io - specific design. In numerical simulations, an elastic tube was us to crimp and release the self-expandable stent in the diseased . The effect of this lesion-specific design on lumen gain was investigated by employing FE results for a commercial stent with a uniform design as a reference. The obtained results showed that the lesion-specific stent achieved larger lumen area in the artery wit diffusive lesion . © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of International Conference on Stents: Materials, Mechanics and Manufacturing ICS3M 2019. International Conference on Stents: Materials, Mechanics and Manufacturing ICS3M 2019 Mechanical Performance of Self-expandable Nitinol Stent with Lesion-specific Design Ran He, Liguo Zhao 0F * , Vadim V. Silberschmidt Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Epinal Way, Loughborough, LE11 3TU, UK Abstract This paper aims to assess the performance of a self-expandable nitinol stent, with lesion-specific design, using a finite-element (FE) method. A superelastic model was adopted to describe the superelasticity of nitinol. Hyperelastic models with damage, calibrated against experimental results, were used to describe the stress-stretch responses of arterial layers and plaque. Abaqus CAE was used to create FE models for a femoral artery with non-uniform diffusive stenosis and a nitinol stent with a lesion specific design. In numerical simulations, an elastic tube was used to crimp and release the self-expandable stent in the diseased artery. The effect of this lesion-specific design on lumen gain was investigated by employing FE results for a commercial stent with a uniform design as a reference. The obtained results showed that the lesion-specific stent achieved larger lumen area in the artery with diffusive lesions. International Conference on Stents: Materials, Mechanics and Manufacturing ICS3M 2019 Mechanical Performance of S lf-expandable Nitinol Stent with Lesion-specific Design Ran He, Liguo Zhao 0F * , Vadim V. Silberschmidt Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Epinal Way, Loughborough, LE11 3TU, UK Ab tr ct Th s paper aims o assess the performanc of a self-expandable nitinol stent, with lesion-specific design, usi g a finit -element (FE) method. A sup relastic odel was adopted to describe the s perelasticity of nitinol. Hyperelastic mod ls damage, Keywords: Lesion-specific design; Nitinol stent; Self-expandable; Finite element; Diffuse stenosis 1. Introduction Stenosis is a progressive vascular disease, in which the arterial wall thickens compared to its healthy condition, 1. Introduction Stenosis is a progressive vascular disease, in which the arterial wall thickens compared to its healthy condition, Keywords: Lesion-specific design; Nitinol stent; Self-expandable; Finite element; Diffuse stenosis

* Corresponding author. Tel.: 0044-1509-227799. E-mail address: L.Zhao@Lboro.ac.uk * Corresponding author. Tel.: 0044-1509-227799. E mail address: L.Zhao@Lboro.ac.uk

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of International Conference on Stents: Materials, Mechanics and Manufacturing ICS3M 2019. 2452-3216 © 2019 The Authors. Published b Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of International Conference on Stents: Materials, Mechanics and Manufacturing ICS3M 2019.

2452-3216  2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of International Conference on Stents: Materials, Mechanics and Manufacturing ICS3M 2019. 10.1016/j.prostr.2019.07.005