中国机械工程

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热作模具热疲劳寿命评估及预测方法的研究进展

苏楠;陈明和   

  1. 南京航空航天大学机电学院,南京,210016
  • 出版日期:2019-06-10 发布日期:2019-06-11
  • 基金资助:
    航空科学基金资助项目(20153021001)

Research Advances in Evaluation and Prediction Method of Thermal Fatigue Life for Hot-working Dies

SU Nan;CHEN Minghe   

  1. College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing,210016
  • Online:2019-06-10 Published:2019-06-11

摘要: 热作模具服役过程中存在温度及机械载荷的循环变化,产生变形及失效的机理复杂,故热作模具热疲劳寿命的评估预测是模具应用研究的难点。结合现有研究成果,介绍了热应力疲劳研究中可用于热作模具热疲劳寿命评估及预测的方法, 从唯象寿命模型和损伤累积模型两个角度分别阐述了热作模具热机械疲劳寿命的研究,并对热作模具热疲劳寿命预测的发展趋势进行了展望。

关键词: 热疲劳寿命, 热作模具, 热应力疲劳, 热机械疲劳

Abstract: Due to the cyclic changes of temperature and mechanical loading during hot-working processes, the deformations and failure mechanism of hot-working dies were complex, so the thermal fatigue life of hot-working dies was difficult to be evaluated and predicted in the applications of dies. Combined with the existing research results,the methods for evaluating and predicting the thermal fatigue life of hot-working dies were introduced动者in the studies of thermal stress fatigue. The thermal-mechancial fatigue life of hot-working dies was studied from two perspectives of phenomenological life model and damage cumulative model respectively. And the development trends of thermal fatigue life prediction for hot-working dies were prospected.

Key words: thermal fatigue life, hot-working die, thermal-stress fatigue, thermal-mechanical fatigue

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