Fatigue damage, time‐dependent creep damage and their interaction are considered as the main failure mechanisms for many high temperature structural components. A generalized methodology for predicting both the high temperature low cycle fatigue (HTLCF) and creep‐fatigue lives by using the hysteresis energy density rate (HEDR) and fatigue damage stress concepts was proposed. Experimental data for HTLCF and creep‐fatigue in Alloy 617, Haynes 230 and P92 steel were respectively collected to validate the method. A better prediction capacity and most of the data points that fall within a 1.5 scatter band were obtained compared with the traditional energy‐based method, time fraction rule and ductility exhaustion model. Moreover, a creep‐fatigue damage diagram was also constructed by using the proposed approach.

中文翻译：

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利用磁滞能量密度率概念的高效疲劳和蠕变疲劳寿命预测方法

疲劳损伤，随时间变化的蠕变损伤及其相互作用被认为是许多高温结构部件的主要失效机理。提出了一种利用磁滞能量密度率（HEDR）和疲劳损伤应力概念来预测高温低周疲劳（HTLCF）和蠕变疲劳寿命的通用方法。分别收集了617，Haynes 230和P92合金钢的HTCCF和蠕变疲劳实验数据以验证该方法。与传统的基于能量的方法，时间分数规则和延性衰竭模型相比，获得了更好的预测能力，并且大多数数据点都落在1.5个散射带内。此外，还使用所提出的方法构造了蠕变疲劳损伤图。