综述了金属材料疲劳失效分析的基本过程和疲劳寿命评估方法,重点介绍了工程中常用的Miner线性累积损伤理论、能量法、弹塑性有限元法、超载迟滞模型等评估理论和模型,分析了这几种方法和模型的适用条件及优缺点.随着试验技术和计算机模拟技术的发展,假设条件将更精确,采用试验和计算机模拟技术相结合的方法预测和评估金属材料疲劳寿命是今后的发展方向.
Fatigue failure analysis processes and fatigue life assessment methods for metal materials are reviewed.The evaluation theories and models which were used widely in engineering,such as the Miner linear cumulative damage theory,the energy method,the elastic-plastic finite element method,the overload retardation model,are mainly introduced.The application conditions,advantages and disadvantages of these methods and models are also analyzed.With the development of the experimental technique and computer simulation technology,the assumptions will be more accuracy.Therefore the combined method of experiment and computer simulation for the fatigue life prediction and assessment of metal materials will be one of the most important development directions in the future.
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