Some commonly used fatigue life analysis approaches for notched components were systemically reviewed.According to different descriptions of the notch effect

the fatigue life analysis approaches for notched component were classified into three categories

namely

local stress-strain approaches

stress gradient approaches and critical zone approaches.The capability of each approach was discussed and experimentally checked by four groups of LCF(low cycle fatigue) test data of LY12CZ aluminum alloy under different notch geometry.It's found that the predictions with regard to stress gradient and distribution of stress field (e.g. critical zone approach and stress gradient approach) show a good agreement with test data as well as the stress field intensity approach can predict the correct failure location

while the local stress-strain approach showes poor fitness and low accuracy.