Abstract In this paper, the distinction between material ratchetting and structural ratchetting is clarified, and the concept of constant life diagram is extended to depict low cycle fatigue life boundary in structural design. To provide a novel one-stop solution for structural fatigue and ratchetting problems, a Unified Procedure for Fatigue and Ratchet Analysis (UPFRA) has been proposed. The UPFRA has been successfully applied to two different engineering structures considering complex geometry and temperature-dependent material properties. By comparing the results with ABAQUS step-by-step inelastic analysis, the UPFRA has been verified to be a robust engineering tool with great accuracy, usability, and efficiency.

中文翻译：

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受任意循环热机械载荷历史影响的结构棘轮和疲劳分析的统一直接方法

摘要 本文阐明了材料棘轮和结构棘轮的区别，并在结构设计中扩展了恒寿命图的概念来描绘低周疲劳寿命边界。为了为结构疲劳和棘轮问题提供一种新颖的一站式解决方案，已经提出了疲劳和棘轮分析统一程序 (UPFRA)。考虑到复杂的几何形状和与温度相关的材料特性，UPFRA 已成功应用于两种不同的工程结构。通过将结果与 ABAQUS 逐步非弹性分析进行比较，UPFRA 已被证明是一种具有极高准确性、可用性和效率的强大工程工具。