摘要
给出一种描述P－ε－N曲线的方法──三参数幂函数拟合法。该方法可以使P－ε－N曲线试验数据在双对数函数坐标系lgN-lg（ε-ε0）中最大限度地呈现线性关系，因而具有较小的均方差，而且解反映出P－ε－N曲线的变化趋势。对于应变-寿命关系也具有可逆性，因而可以方便地进行应变疲劳可靠性计算。
In this paper, a estimetor method for P-ε-N curves is disscussed by means of three-parameter power function. There is a linear relationship between logN and log(ε-ε0) from test data of P-ε-N cutve by this method, so that the variance is small. The change development of P-ε-N curve can be predicted and strain fatigue reliability can be conveniently calculated by means of the P-ε-N curves.
出处
《强度与环境》
北大核心
1996年第2期19-22,共4页
Structure & Environment Engineering
关键词
材料疲劳
疲劳寿命
疲劳曲线
Fatigue (materials), Fatigule life, Fatigue curve
