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Title:A Corrosion Model for Bioabsorbable Metallic Stents
Authors:J.A. Grogan, B.J. O'Brien, S.B. Leen and P.E. McHugh, 2011
Abstract: In this study a numerical model is developed for application in predicting the effects of corrosion on the mechanical integrity of bioabsorbable metallic stents. To calibrate the model the effects of corrosion on the integrity of biodegradable metallic foils are assessed experimentally. In addition, the effects of mechanical loading on the corrosion behaviour of the foil samples are determined. A phenomenological corrosion model is developed and applied within a finite element framework, allowing for the analysis of complex three dimensional structures. The model is used in predicting the performance of a bioabsorbable stent in an idealised arterial geometry as it is subject to corrosion over time. The effects of homogeneous and heterogeneous corrosion processes on long-term stent scaffolding ability are contrasted based on model predictions.
ICHEC Project:Towards the estimation of minimum strut sizes in coronary stents
Publication:J.A. Grogan, B.J. O'Brien, S.B. Leen, P.E. McHugh, A Corrosion Model for Bioabsorbable Metallic Stents, Acta Biomaterialia, In Press, Accepted Manuscript, Available online 30 May 2011, ISSN 1742-7061, DOI: 10.1016/j.actbio.2011.05.032.
URL: http://www.sciencedirect.com/science/article/pii/S1742706111002339
Keywords: Biodegradable magnesium; Finite element; Pitting corrosion; Damage modelling
Status: Accepted

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