Application of the cyclic R-curve method to notch fatigue analysis

A comparison of fatigue strength sensitivity to defects for materials manufactured by AM or traditional processes

“…Alternative methods are based on determining the R-curve from ∆K th experiments and then the analytical calculation of the threshold stress for a crack emanating from a defect [97][98][99][100].…”

Damage tolerant design of additively manufactured metallic components subjected to cyclic loading: State of the art and challenges

“…Instead a plasticity-corrected factor, e.g. based on a cyclic J integral [58,214,266], cf. also [60], has to be determined.…”

Mode III threshold under Rolling Contact Fatigue and development of a test gearbox for planet gears

“…The cyclic R-curve can be used to predict the fatigue limit of components 65 containing small defects like casting porosity, inclusions, corrosion pits [24], or even in special applications such as fretting fatigue [25] and influence of the surface roughness (notch sensitivity) [26]. The most promising application of the cyclic R-curve method is undoubtedly the prediction of the threshold stress, σ th , as a function of the non-propagating crack length, which goes under the [32] showed that particular attention should 75 be paid when the KT-diagram is obtained on small artificial notches of finite depth.…”