The ASME code_based evaluation with 20 reduction factor on the mean life is much more conservative than that with 2 reduction factor on the stress amplitude.

• ASME法中，基于20倍裂纹萌生寿命降低系数的S?N曲线估计结果较基于2倍虚拟应力幅降低系数的估计结果要保守得多。