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Numerical investigations of the structural behavior of a balloon expandable stent design using finite element method
Computational materials science, 2013-05, Vol.72, p.54-61
Azaouzi, M.
Makradi, A.
Belouettar, S.
2013
Volltextzugriff (PDF)
Details
Autor(en) / Beteiligte
Azaouzi, M.
Makradi, A.
Belouettar, S.
Titel
Numerical investigations of the structural behavior of a balloon expandable stent design using finite element method
Ist Teil von
Computational materials science, 2013-05, Vol.72, p.54-61
Ort / Verlag
Amsterdam: Elsevier B.V
Erscheinungsjahr
2013
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
► Bridge’s design has a significant impact on the flexibility of cardiovascular balloon-expandable stents. ► Residual stresses over the stent that are generated after expansion depend on the bridge’s design. ► Unsymmetrical design of bridges may improve considerably the structural behavior of the stent during deployment. ► Elastic longitudinal recoil of the stent may be reduced significantly by optimizing the bridge’s design. This paper discusses some issues regarding the structural behavior of a Balloon-Expandable (BE) stent made of stainless steel material (AISI316L). BE stent is a tubular, often mesh-like, structure which is expanded inside a diseased (stenosed) artery segment to restore blood flow and keep the vessel open following angioplasty. Most of BE stent designs have two fundamental constituents: expandable ring elements, and connecting elements “bridges” which connect adjacent rings together. The stent design is a major factor which determines its reliability during insertion into the blocked artery and throughout the long term in vivo service. The objective of this paper is to study the structural behavior of the stent in order to show the effect of the stent design, especially the geometry of the “bridges” in terms of flexibility, torsion and expansion. The numerical investigation is based on Finite Element Analysis (FEA) using Abaqus© finite element code. It has been demonstrated by FEA that the geometry of the connecting elements “bridges” has a significant impact on the structural behavior of the stent.
Sprache
Englisch
Identifikatoren
ISSN: 0927-0256
eISSN: 1879-0801
DOI: 10.1016/j.commatsci.2013.01.031
Titel-ID: cdi_crossref_primary_10_1016_j_commatsci_2013_01_031
Format
–
Schlagworte
Biological and medical sciences
,
Diseases of the cardiovascular system
,
Finite element analysis
,
Medical sciences
,
Numerical simulation
,
Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)
,
Stent design
,
Structural behavior
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