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Finite Element Analysis of Stent Expansion Considering Stent-Balloon Interaction


Stouts are frequently used throughout the human body, but the most critical areas are in coronary arteries. They open pathways in vessels and supply blood directly to the heart muscle. To simulate behavior of expansion for the coronary stent by balloon, the commercial finite element code LS-DYNA and ANSYS were used in the analysis. The explicit method is used to analyze the expansion of the stent and the implicit method is performed to simulate the springback that developed in a stent after the balloon pressure has been removed. Finally the experimental results for the expansion of the PS153 stents were compared with the FEM results. The springback was measured with the stents subjected to no external pressure to which stents are subjected in vivo. The simulated results were in good agreement with experimental results. Standard mechanical characteristics such as stress, plastic strains, and springback can be derived from the numerical results. These data can be used to determine maximum expansion diameter without fracture and expansion pressure considering elastic recoil.

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참고문헌 (8)

  1. Harry C. Lowe, Stephen N. Oesterle and Levon M. Khachigian, 2002, 'Coronary In-Stent Restenosis : Current Status and Future Strategies,' Journal of the American College of Cardiology, Vol. 39, No. 2, pp. 183-193 
  2. Paul Barragan, Regis Rieu, Vincent Garitey, Pierre-Olivier Roquebert, Joel Sainsous, Marc Silvestri and Gilles Bayet, 2000, 'Elastic Recoil of Coronary Stents: A Comparative Analysis,' Catheterization and Cardiovascular Interventions, Vol. 50, pp. 112-119. 
  3. John P. Cheatham, 2001, 'Improved Stents for Pediatric Applications,' Progress in Pediatric Cardiology, Vol. 14, pp. 95-115 
  4. Patrick W. Serruys and Michael J.B. Kutryk, 2002, 'Handbook of coronary stents, ' Second Edition. London: Martin Dunitz 
  5. Byung-Ki Oh, Hae-Yong Cho and Yong-Yun Kim, 2004, 'Finite Element Analysis of Mechanical Properties of a Balloon-Expandable Stent,' J. of KSME Series A, Vol. 28, No.7, pp. 915-922. 
  6. Kim JR Rasmussen, 2001, 'Full-range Stress-strain Curves for Stainless Steel Alloys,' The University of Sydney, Research Report No R811, pp. 1-44 
  7. S. J. Shin, T. S. Lee and S. I. Oh, 1998, 'Three-dimensional Finite Element Analysis of Rubber Pad Deformation - Part I: Development of Implicit and Explicit Methods,' J. of KSME Series A, Vol. 22, No.1, pp. 111-120 
  8. S. J .Shin, T. S. Lee and S. I. Oh, 1998, 'Three-dimensional Finite Element Analysis of Rubber Pad Deformation - Part II: Applications,' J. of KSME Series A, Vol. 22, No.1, pp. 121-131 

이 논문을 인용한 문헌 (2)

  1. Jeon, Dong-Min ; Jung, Won-Gyun ; Kim, Han-Ki ; Kim, Sang-Ho ; Shin, Il-Gyun ; Jang, Hong-Seok ; Suh, Tae-Suk 2010. "Deduction and Verification of Optimal Factors for Stent Structure and Mechanical Reaction Using Finite Element Analysis" 의학물리 = Korean journal of medical physics, 21(2): 201~208 
  2. Kim, Dae-Young ; Lee, Seung-Yeol ; Kim, Heon-Young 2012. "Numerical Evaluation and Shape Design of Coronary Artery Stent" 한국정밀공학회지 = Journal of the Korean Society of Precision Engineering, 29(1): 103~108 


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