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Lookup NU author(s): Dr David Fletcher,
Dr Francis Franklin,
Professor Ajay Kapoor
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Plastic flow of near-surface rail material under contact loading is a feature of rail/wheel contact, and severe flow typically leads to both wear, and the initiation and development of small surface-breaking cracks. This paper presents results from a ratcheting based computer simulation, which has been developed to allow the simultaneous investigation of wear, crack initiation and early crack propagation. To identify repeatably small crack-like flaws, image analysis is applied to the visual representation of the wearing surface generated by themodel. This representation shows a good similarity to traditional micrographs taken from sections of worn surfaces. The model clearly reveals the interaction of wear with crack development, processes which are linked because wear truncates surface-breaking cracks, and can completely remove small surface-breaking cracks.
Author(s): Fletcher DI; Kapoor A; Franklin FJ
Publication type: Article
Publication status: Published
Journal: Fatigue and Fracture of Engineering Materials and Structures
ISSN (print): 8756-758X
ISSN (electronic): 1460-2695
Publisher: Wiley-Blackwell Publishing Ltd.
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