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Mechanistic modelling methodologies for microstructurally-sensitive crack growth in ductile metals

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Title: Mechanistic modelling methodologies for microstructurally-sensitive crack growth in ductile metals
Authors: Wilson, David Joel
Item Type: Thesis or dissertation
Abstract: A physically-based methodology for modelling microstructurally-sensitive fatigue crack growth has been developed and shown to capture many of the experimentally observed effects associated with microstructurally-sensitive fatigue crack growth, which currently contribute to the high levels of uncertainty in lifing models. Behaviours predicted by the model cover changes in rate and path due to interactions with local microstructural features including rate changes due to local crystal orientations, deflections and retardation at grain boundaries and crack path tortuosity within grains. The ability of the model to accurately capture these key behaviours has enabled their rationalisation within a physically-based, mechanistic framework.
Content Version: Open Access
Issue Date: Dec-2018
Date Awarded: Apr-2019
URI: http://hdl.handle.net/10044/1/68620
DOI: https://doi.org/10.25560/68620
Copyright Statement: Creative Commons Attribution NonCommercial ShareAlike Licence
Supervisor: Dunne, Fionn
Britton, Ben
Sponsor/Funder: Rolls-Royce Group plc
Engineering and Physical Sciences Research Council
Funder's Grant Number: MMRE_P63738
Department: Materials
Publisher: Imperial College London
Qualification Level: Doctoral
Qualification Name: Doctor of Philosophy (PhD)
Appears in Collections:Materials PhD theses