应力比R为常数时细节疲劳额定值（DFR）与其它疲劳参数之间关系研究

RESEARCH ON THE RELATIONSHIPS BETWEEN DFR AND OTHER FATIGUE PARAMETERS UNDER CONSTANT STRESS RATIOS

为了满足概率疲劳分析的需要，推导出了应力比Ｒ等于常数时细节疲劳额定值（ＤＦＲ）与其它疲劳参数之间的解析表达式，从而使Ｓ－Ｎ曲线解析化。通过焊接件的疲劳试验和分析证明了其有效性和实用性。

o satisfy the needs of probabilistic fatigue analysis,on certain assumption conditions,the relationships between Detail Fatigue Rating(DFR)and other fatigue parameters under con- stant stress ratios are obtained. Analysis of the fatigue test results of welding specimens shows that the relationships are correct.