对于缺口疲劳试样，则采用半寿命阶段的疲劳参数的预测结果为最小。
As for notched specimen, the fatigue life prediction using fatigue factors of half-life section is the smallest.
测定了300M钢的缺口疲劳始裂寿命曲线，给出了估算疲劳始裂寿命的方法。
The fatigue crack initiation life of 300M steel is experimentally investigated and a simple method for predicting the fatigue crack initiation life of materia is offered.
预过载拉伸可提高铝合金缺口疲劳寿命，但效果不及喷丸； 过载量太大还使寿寿命趋于子下降。
The experiments on notched specimens of an Aluminium alloy indicat that the notch fatigue life can be increased by a tensile over-pre loading but decreased by a compressive over-pre loading.
应用推荐