Microstructure-sensitive fatigue modelling of medical-grade fine wire

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dc.contributor.authorClark, B. C.
dc.contributor.authorCastelluccio, Gustavo M.
dc.contributor.authorReiterer, M. W.
dc.contributor.authorMcDowell, D. L.
dc.contributor.authorNeu, R. W.
dc.date.accessioned2018-06-28T14:22:21Z
dc.date.available2018-06-28T14:22:21Z
dc.date.issued2018-06-27
dc.description.abstractThis work presents a modelling methodology to assess the sensitivity to microstructure in high‐cycle fatigue performance of fine wires made from MP35N alloy (35Ni‐35Co‐20Cr‐10Mo in wt%) used as conductors in cardiac leads. The model consists of a microstructure generator that creates a mesh of a statistically representative microstructure, a finite element analysis using a crystal plasticity constitutive model to determine the local response behaviour of the microstructure, and a postprocesser using fatigue indicating parameters to assess the likelihood of fatigue crack initiation. The fatigue crack initiation potency for selected microstructure attributes, boundary and interface conditions, and loading profiles is determined by computing the Fatemi‐Socie fatigue indicating parameter over a physically relevant volume of scale. Case studies are used to investigate (1) the influence of nonmetallic inclusion proximity to the wire surface on fatigue potency and (2) the transition life demarcating lives primarily controlled by fatigue crack initiation versus microcrack fatigue growth.en_UK
dc.identifier.citationClark BC, Catelluccio GM, Reiterer M, McDowell DL, Neu RW, Microstructure-sensitive fatigue modeling of medical-grade fine wire, Fatigue & Fracture of Engineering Materials & Structures, Volume 42, Issue 1, January 2019, pp. 152-165en_UK
dc.identifier.issn8756-758X
dc.identifier.urihttp://dx.doi.org/10.1111/ffe.12879
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/13284
dc.language.isoenen_UK
dc.publisherWileyen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectCrystal plasticityen_UK
dc.subjectFatigue indicator parametersen_UK
dc.subjectFine wireen_UK
dc.subjectInclusionsen_UK
dc.titleMicrostructure-sensitive fatigue modelling of medical-grade fine wireen_UK
dc.typeArticleen_UK

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