到目前为止,弯曲疲劳极限的经验公式已发表很多。但比较通用而误差较小的公式不多见。本文提出了一个新的经验公式。验算结果表明,新公式和其他公式相比,误差更小,适用性更广。关于对称循环弯曲疲劳极限的估计公式,有关教材和文献中已经介绍很多。作者对这些公式一一进行 To date, empirical formulas for bending fatigue limits have been published. But more common and less error of the formula is rare. This paper presents a new empirical formula. The checking results show that the new formula has smaller error and wider applicability than other formulas. About the symmetrical cyclic bending fatigue limit of the formula, the teaching materials and literature have been introduced a lot. The author of these formulas one by one