疲劳裂纹扩展影响因素研究综述

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This paper points the research approaches of the fatigue crack growth through describing their laws. The main influencing factors on fatigue crack growth are residual stress, overload, temperature, loading frequency and stress ratio. Developing related theory and method, understanding influence mechanism correctly and predicting the behavior of the fatigue crack growth scientifically are still those problems that researchers concerned. This paper describes the latest influencing mechanism research about these influencing factors on fatigue crack growth, discusses their effects and obtains common conclusions.文中通过介绍疲劳裂纹扩展的规律，指出了疲劳裂纹扩展的研究途径。残余应力、超载、温度、加载频率和应力比是影响疲劳裂纹扩展的主要因素。发展相关理论和方法，正确认识影响机理，科学预测疲劳裂纹扩展行为一直是研究者关注的问题。文中介绍了近年来残余应力、超载、温度、加载频率和应力比对材料疲劳裂纹扩展的影响机理方面的研究，论述了其影响效果，得出了常用结论。