Effect of size and geometry of small defects on the fatigue limit

摘要: This chapter investigates the effect of size and geometry small defects on fatigue limit. If notches is relatively large, visible to naked eye, then maximum permissible stress σ max at a notch root has one-to-one correspondence with gradient ϰ root. Therefore, if master curve for relationship between limit determined from laboratory tests, elastic roots components structures can be predicted. However, as become extremely small, deviates curve. because (depth) becomes same order damage domain A phenomenon similar that shallow occurs, in threshold region, growth cracks.