Abstract
AbstractThe history of researches on fatigue crack growth is briefly described and some problems in fatigue crack growth are pointed out. Three types of fatigue crack growth rate curves, conventional, tri-linear transitional and multi-linear curves, are defined. Fatigue crack growth rates are influenced by Young’s modulus of material, E. The effect of stress ratio and fatigue crack growth behaviour under variable loading can be explained by the fatigue crack closure. Some important issues in fatigue crack closure measurement are described. The error criteria in da/dN–ΔKeff curve and fatigue crack growth predictions are pointed out and the details of crack growth predictions to be performed are briefly described.
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