|Table of Contents|

[1] Ni Xiaoyu, Wang Guo, Long Zhihong, Pan Changwang, et al. Analysis of mechanical performanceof braided esophageal stent structure and its wires [J]. Journal of Southeast University (English Edition), 2012, 28 (4): 457-463. [doi:10.3969/j.issn.1003-7985.2012.04.015]
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Analysis of mechanical performanceof braided esophageal stent structure and its wires()
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
28
Issue:
2012 4
Page:
457-463
Research Field:
Biological Science and Medical Engineering
Publishing date:
2012-12-30

Info

Title:
Analysis of mechanical performanceof braided esophageal stent structure and its wires
Author(s):
Ni Xiaoyu1 Wang Guo2 Long Zhihong2 Pan Changwang3
1School of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, China
2Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing 211189, C
Keywords:
braided esophageal stent finite element mechanical performance radial stiffness wire
PACS:
R318
DOI:
10.3969/j.issn.1003-7985.2012.04.015
Abstract:
This paper aims to find the relationship between the structural parameters and the radial stiffness of the braided stent and to understand the stress distribution law of the wires. According to the equation of the space spiral curve, a three-dimensional parametrical geometrical model is constructed. The finite element model is built by using the beam-beam contact elements and 3D beam elements. The constituent nitinol wires are assumed to be linear elastic material. The finite element analysis figures out that the radial stiffness of the stent and the stress distribution of the wires are influenced by all the structural parameters. The helix pitch of the wires is the most important factor. Under the condition of the same load and other structural parameters remaining unchanged, when the number of wires is 24, the stress of the wire cross-section is at the minimum. A comparison between the vitro experimental results and the analytical results is conducted, and the data is consistent, which proves that the current finite element model can be used to appropriately predict the mechanical performance of the braided esophageal stents.

References:

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[3] Wang Y X, Yi H, Ni Z H, et al. Research on biomechanical characteristic of medical vascular stent[J]. Journal of Southeast University: Natural Science Edition, 2005, 35(2): 216-221.(in Chinese)
[4] Wang G, Ni Z H, Ni X Y, et al. Radial support properties of esophagus stent[J]. Journal of Southeast University: Natural Science Edition, 2011, 41(5): 987-991.(in Chinese)
[5] Ni X Y, Ni Z H, Pan C W. Analysis on fatigue life of esophagus stent based on finite element[J]. Journal of Southeast University: Natural Science Edition, 2009, 39(5): 919-922.(in Chinese)
[6] De Beule M, Van Cauter S, Mortier P, et al. Virtual optimization of self-expandable braided wire stents[J]. Med Eng Phys, 2009, 31(4): 448-53.
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Memo

Memo:
Biography: Ni Xiaoyu(1975—), female, doctor, associate professor, xyni_luck@163.com.
Foundation items: The National Natural Science Foundation of China(No.51005124), the Opening Foundation of Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments(No.JSNB-2009-1-1).
Citation: Ni Xiaoyu, Wang Guo, Long Zhihong, et al. Analysis of mechanical performance of braided esophageal stent structure and its wires[J].Journal of Southeast University(English Edition), 2012, 28(4):457-463.[doi:10.3969/j.issn.1003-7985.2012.04.015]
Last Update: 2012-12-20