کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10433167 | 910278 | 2012 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Shape optimization of stress concentration-free lattice for self-expandable Nitinol stent-grafts
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موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی پزشکی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Shape optimization of stress concentration-free lattice for self-expandable Nitinol stent-grafts Shape optimization of stress concentration-free lattice for self-expandable Nitinol stent-grafts](/preview/png/10433167.png)
چکیده انگلیسی
In a mechanical component, stress-concentration is one of the factors contributing to reduce fatigue life. This paper presents a design methodology based on shape optimization to improve the fatigue safety factor and increase the radial stiffness of Nitinol self-expandable stent-grafts. A planar lattice free of stress concentrators is proposed for the synthesis of a stent with smooth cell shapes. Design optimization is systematically applied to minimize the curvature and reduce the bending strain of the elements defining the lattice cells. A novel cell geometry with improved fatigue life and radial supportive force is introduced for Nitinol self-expandable stent-grafts used for treating abdominal aortic aneurism. A parametric study comparing the optimized stent-graft to recent stent designs demonstrates that the former exhibits a superior anchoring performance and a reduction of the risk of fatigue failure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Biomechanics - Volume 45, Issue 6, 5 April 2012, Pages 1028-1035
Journal: Journal of Biomechanics - Volume 45, Issue 6, 5 April 2012, Pages 1028-1035
نویسندگان
Ehsan Masoumi Khalil Abad, Damiano Pasini, Renzo Cecere,