By means of Peterson's formula and the concept of the worst fatigue notch factor, a model of prediction of S-N curve for welded structual under general ratio of stresses is developed, A few S-N curves of welded structures have been predicted.
本文考虑了焊接结构的几何形状、受载形式、应力比、残余应力、尺寸效应以及材料等因素对疲劳寿命的影响,利用Peterson公式和极值疲劳切口系数概念,建立了一般应力比时焊接结构S-N曲线的预估模型。
It is shown that the methods have high accuracy under general ratio of stresses for predicting effective stress concentrtion factor of welded joint from theoretical .
利用Peterson公式和Topper公式,在引入极值疲劳切口系数概念的基础上,建立了一般应力比时焊接节点的两个有效应力集中系数估算公式,理论计算与实验结果的比较表明:用该方法预测焊接节点的有效应力集中系数有较好的准确度。
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