Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 144-156 |
| Number of pages | 13 |
| Journal | Annals of Biomedical Engineering |
| Volume | 48 |
| Issue number | 1 |
| Early online date | 17 Jul 2019 |
| DOIs | |
| Publication status | Published - 1 Jan 2020 |
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Keywords
- stent
- finite element analysis
- aneurysm
- ring bundle
- anaconda
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Evaluation of a new approach for modelling full ring stent bundles with the inclusion of manufacturing strains. / Kyriakou, Faidon; Bow, David; Dempster, William; Brodie, Robbie; Nash, David.
In: Annals of Biomedical Engineering , Vol. 48, No. 1, 01.01.2020, p. 144-156.Research output: Contribution to journal › Article
TY - JOUR
T1 - Evaluation of a new approach for modelling full ring stent bundles with the inclusion of manufacturing strains
AU - Kyriakou, Faidon
AU - Bow, David
AU - Dempster, William
AU - Brodie, Robbie
AU - Nash, David
PY - 2020/1/1
Y1 - 2020/1/1
N2 - Ring stent bundles have been used in several biomedical stent-graft devices for decades, yet in the published literature, the numerical models of these structures always present significant simplifications. In this paper, a finite element (FE) ring stent bundle has been developed and evaluated with a combination of beam and surface elements. With this approach, the shape, the global stiffness and the strains of the structure can all be well predicted at a low computational cost while the approach is suitable for application to non-symmetrical, patient-specific implant simulations. The model has been validated against analytical and experimental data showing that the manufacturing strains can be predicted to a 0.1% accuracy and the structural stiffness with 0–7% precision. The model has also been compared with a more computationally expensive FE model of higher fidelity, revealing a discrepancy of 0–5% of the strain value. Finally, it has been shown that the exclusion of the manufacturing process from the simulation, a technique used in the literature, quadruples the analysis error. This is the first model that can capture the mechanical state of a full ring stent bundle, suitable for complex implant geometry simulations, with such accuracy.
AB - Ring stent bundles have been used in several biomedical stent-graft devices for decades, yet in the published literature, the numerical models of these structures always present significant simplifications. In this paper, a finite element (FE) ring stent bundle has been developed and evaluated with a combination of beam and surface elements. With this approach, the shape, the global stiffness and the strains of the structure can all be well predicted at a low computational cost while the approach is suitable for application to non-symmetrical, patient-specific implant simulations. The model has been validated against analytical and experimental data showing that the manufacturing strains can be predicted to a 0.1% accuracy and the structural stiffness with 0–7% precision. The model has also been compared with a more computationally expensive FE model of higher fidelity, revealing a discrepancy of 0–5% of the strain value. Finally, it has been shown that the exclusion of the manufacturing process from the simulation, a technique used in the literature, quadruples the analysis error. This is the first model that can capture the mechanical state of a full ring stent bundle, suitable for complex implant geometry simulations, with such accuracy.
KW - stent
KW - finite element analysis
KW - aneurysm
KW - ring bundle
KW - anaconda
UR - https://link.springer.com/journal/10439
U2 - 10.1007/s10439-019-02322-0
DO - 10.1007/s10439-019-02322-0
M3 - Article
VL - 48
SP - 144
EP - 156
JO - Annals of Biomedical Engineering
JF - Annals of Biomedical Engineering
SN - 0090-6964
IS - 1
ER -