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An incremental elastic–plastic triaxiality dependent fatigue model
, I.S. Nijin
Published in Springer Science and Business Media B.V.
Volume: 227
Issue: 1
Pages: 39 - 55
A stress-state dependent cyclic cohesive model, which accounts for accumulation of plasticity, during both tensile as well as compressive deformations, and incorporates accumulation of irreversible damage due to macroscopic plasticity as well as microstructural mechanisms, is formulated. The model is implemented in mode-I plane strain fatigue crack growth simulations. The model is validated by reproducing the effect of retardation in crack growth rates after different combinations of tensile and compressive overloads. We show accurate description of the elastic–plastic behaviour of the process zone is vital, in particular for negative stress ratios subsequent to a tensile over-load, as considerable plasticity occurs in compression at the crack-tip, significantly reducing retardation effects. © 2020, Springer Nature B.V.
About the journal
JournalData powered by TypesetInternational Journal of Fracture
PublisherData powered by TypesetSpringer Science and Business Media B.V.
Open AccessNo