A method for calculating the creep damage during low cycle fatigue (LCF) (tensile plasticity reversed by compressive plasticity, PP) controlled by strain rate $\dot{\epsilon }$ was proposed. According to the equivalent principle of creep damage with the same reduction in cross section, a creep damage model considering a continuously changing stress was established based on the equivalent creep stress ${\sigma }_{\text{en}}$, which was determined by the total creep damage, the actual creep time (the total time of tensile loading stage in the whole process of fatigue), and the fatigue life during LCF (PP). For Sanicro 25 alloy, ${\sigma }_{\text{en}}$ first increases quickly, and then increases linearly and slowly with increasing $\dot{\epsilon }$. Based on the creep damage model, the total creep damage and fatigue life under different $\dot{\epsilon }$ were predicted accurately. To study the application of the method for calculating the creep damage, the creep damage model for 316 stainless steel was established and verified. At a constant $\dot{\epsilon }$, when $\gamma$ decreases or $\mathrm{K}$ increases, the creep damage decreases and the fatigue life increases. Based on the variation trend, the engineering application of the creep damage model was discussed.

一种计算应变率控制的低周疲劳（LCF）（拉伸塑性由压缩塑性逆转，PP）蠕变损伤的方法 $\dot{\epsilon }$被提议。根据等截面减小蠕变损伤等效原理，基于等效蠕变应力建立考虑连续变化应力的蠕变损伤模型。${\sigma }_{\text{恩}}$，由总蠕变损伤、实际蠕变时间（整个疲劳过程中拉伸加载阶段的总时间）和LCF期间的疲劳寿命（PP）决定。对于 Sanicro 25 合金，${\sigma }_{\text{恩}}$ 先快速增加，然后随着增加而线性缓慢增加 $\dot{\epsilon }$. 基于蠕变损伤模型，不同条件下的总蠕变损伤和疲劳寿命$\dot{\epsilon }$被准确预测。为研究蠕变损伤计算方法的应用，建立并验证了316不锈钢蠕变损伤模型。在一个常数$\dot{\epsilon }$， 什么时候 $\gamma$ 减少或 $\mathrm{钾}$增加，蠕变损伤减少，疲劳寿命增加。根据变化趋势，探讨了蠕变损伤模型的工程应用。