对于在非对称循环交变应力下构件疲劳强度的计算,本文采用贝格塞理论代替了传统的计算方法。此方法是将构件的极限应力曲线用一个方程来表示,将构件的工作安全区统一为一个区域,将构件的工作安全系数的计算统一写成一个公式,其计算结果与广泛采用的计算方法相符合,但计算简便,结果更为精确。 For the calculation of the fatigue strength of members under the alternating stress of asymmetric cycle, this paper replaces the traditional calculation method with Beziers theory. In this method, the ultimate stress curve of a component is expressed by an equation, and the working safety zone of the component is unified into a region. The calculation of the work safety factor of the component is written as a formula and the calculation result is in accordance with the widely used calculation method , But the calculation is simple, the result is more accurate.