S-N曲线拟合法

A METHOD FOR FITTING S-N CURVE

本文以三参数经验公式N（S-S0）β=α为基础,提出了以线性相关系数r为目标函数确定参数S0的方法,根据该方法可以更好地利用三参数经验公式拟合S-N曲线试验数据。我们对大量的金属材料和非金属材料S-N曲线试验数据进行了处理,曲线拟合程度均很好。

A method by which the parameter S0 in expression N(S-S0)β = a can be evaluated is presented in this paper.By the method fatigue test data of S-N curves can satisfactorily be fitted with N(S-S0)β = a. Many fatigue test results of metallic and nonmetallic materials have been treated by that.