Initial Fatigue Crack Growth Behavior in a Notched Component (Report IV ) : Effect of Tensile Residual Stress(Mechanics, Strength & Structural Design)

概要

論文の詳細を見る
The present report was intended to evaluate the effect of tensile residual stress on initial fatigue crack propagation in a notch field. Initial fatigue crack propagation rate in tensile residual stress field on center notched strip (SS41) is affected by both residual stress and elasto-plastic behavior. In low cycle (high stress) region, the effect of elasto-plastic behavior was remarkable. But in high cycle (low stress) region, the effect of residual stress was conspicuous. The relaxation of residual stress by yielding of notch field was modeled and confirmed by experiments. ΔJ to initial fatigue crack in notch field was calculated by considering both of elasto-plastic effect and residual stress. As the results, initial fatigue crack propagation behavior in notch field with tensile residual stress could be interpreted by using the ΔJ.
大阪大学の論文