Document Detail

Shape optimization of stress concentration-free lattice for self-expandable Nitinol stent-grafts.
MedLine Citation:
PMID:  22304844     Owner:  NLM     Status:  Publisher    
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.
Ehsan Masoumi Khalil Abad; Damiano Pasini; Renzo Cecere
Related Documents :
8391454 - Amastatin interferes with the antagonist properties of men 10,208 in the rabbit pulmona...
8866624 - Histamine-1 receptor blockade does not prevent nitroglycerin induced migraine. support ...
7936834 - Effects of maturation on cyclic gmp-dependent vasodilation in ovine basilar and carotid...
7165854 - Effects of kinins on isolated blood vessels. role of endothelium.
3924164 - Exaggerated responsiveness to thyrotrophin releasing hormone: a risk factor in women wi...
24551834 - Biomarkers for pediatric pulmonary arterial hypertension - a call to collaborate.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-2-2
Journal Detail:
Title:  Journal of biomechanics     Volume:  -     ISSN:  1873-2380     ISO Abbreviation:  -     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-2-6     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0157375     Medline TA:  J Biomech     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier Ltd. All rights reserved.
Mechanical Engineering Department, McGill University, Montreal, Quebec, Canada.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Transducer and base compliance alter the in situ 6 dof force measured from muscle during an isometri...
Next Document:  The pediatric upper limb motion index and a temporal-spatial logistic regression: quantitative analy...