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Fatigue crack growth model for constant amplitude loading
Author(s) -
PANDEY K. N.,
CHAND S.
Publication year - 2004
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.2004.00760.x
Subject(s) - materials science , amplitude , constant (computer programming) , crack growth resistance curve , paris' law , crack closure , energy balance , plasticity , cyclic stress , structural engineering , stress (linguistics) , mechanics , fracture mechanics , composite material , range (aeronautics) , thermodynamics , engineering , physics , quantum mechanics , linguistics , philosophy , computer science , programming language
A fatigue crack growth model under constant amplitude loading has been developed considering energy balance during growth of the crack. The plastic energy dissipated during growth of a crack within cyclic plastic zone and area below cyclic stress–strain curve was used in the energy balance. The near crack tip elastic–plastic stress and strain were calculated on the basis of Hutchinson, Rice and Rosengren (HRR) formulations. Fatigue crack growth rate in linear and near threshold region of d a /d N versus Δ K curve can be determined on the basis of the proposed model in terms of low cycle fatigue (LCF) properties determined on smooth specimen. The predictions of the model have been compared with the experimental and theoretical results available in the literature using mechanical and fatigue properties. The model compares well in the threshold and intermediate region of the d a /d N versus Δ K curve for wide range of material tested.