Explicit and implicit approaches for simulating AISI304 balloon-expandable stents

W. Zaki, S. Zamfir

Research output: Contribution to journalArticlepeer-review

Abstract

The paper presents a comparison between explicit and implicit finite element simulation methods for analyzing balloon-expandable AISI304 stents. The research effort presented herein builds upon an existing work in order to evaluate the importance of superfluous dynamic effects that might arise from using explicit simulation when high loading rates are involved. In practice, two stents with different geometries and cell patterns are analyzed using both the standard and explicit solvers offered by the finite element software Abaqus. In each case, the internal walls of the stent are subjected to increasing pressure in order to emulate contact forces exerted by an expanding balloon. For the explicit simulations, two load cases are considered with different load rates. The results of the finite element simulations are discussed and compared, with special focus on quantities like dogboning, shortening and radial expansion, commonly used for measuring the performance and quality of a stent.

Original languageBritish English
Pages (from-to)22-40
Number of pages19
JournalModelling, Measurement and Control C
Volume70
Issue number1-2
StatePublished - 2009

Keywords

  • Dogboning
  • Explicit simulation
  • Finite elements
  • Implicit simulation
  • Radial expansion
  • Shortening
  • Stents

Fingerprint

Dive into the research topics of 'Explicit and implicit approaches for simulating AISI304 balloon-expandable stents'. Together they form a unique fingerprint.

Cite this