Finite-element analysis of fatigue crack closure under plane strain conditions: stabilization behaviour and mesh size effect

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An elastic-plastic finite-element analysis of fatigue crack closure is performed for plane strain conditions. The stabilization behaviour of crack opening level and the effect of mesh size on the crack opening stress are investigated. It has been well reported that the crack opening level under plane stress conditions becomes stable after the crack advances beyond the initial monotonic plastic zone. In order to obtain a stabilized crack opening level for plane strain conditions, the crack must be advanced through approximately four times the initial monotonic plastic zone. The crack opening load tends to increase with the decrease of mesh size. The mesh size nearly equal to the theoretical plane strain cyclic plastic zone size may provide reasonable numerical results comparable with experimental crack opening data. The crack opening behaviour is influenced by the crack growth increment and discontinuous opening behaviour is observed.
Publisher
BLACKWELL PUBLISHING
Issue Date
2005-03
Language
English
Article Type
Article
Keywords

GROWTH; SIMULATION

Citation

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, v.28, pp.333 - 342

ISSN
8756-758X
DOI
10.1111/j.1460-2695.2005.00881.x
URI
http://hdl.handle.net/10203/87903
Appears in Collection
ME-Journal Papers(저널논문)
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