缺口疲劳极限预测的半椭圆面积法

以受均匀拉应力作用下带贯通裂纹的无限大板裂纹尖端附近的应力场分析为基础，首次提出了一种预测缺口疲劳极限的半椭圆面积法，并通过大量的数值计算分析确定了半椭圆区域的大小,将这种方法分别应用于带不同直径圆孔的无限大板的疲劳极限预测，并与临界距离的点法、线法和面法及Peterson公式计算结果进行了比较，验证了该方法的有效性．

Semi-ellipse area method of fatigue strength prediction for notch specimen

Based on the stress around through-crack tip in an infinite plane loaded by a uniform tensile stress range is studied.A semi-ellipse area method to predict the notch fatigue limit is firstly established and the semi-ellipse region can also be described.This method is firstly applied to predict the fatigue strength of the infinite planes containing circular hole.And the estimation results are compared with the ones which are predicted by critical-distance approach including point method,line method,area method and Peterson's formula.Examples show that a good agreement is achieved between the estimations and results,and the practical values are also proved.