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。
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.
作者
苏楠
陈明和
SU Nan;CHEN Minghe(College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing,210016)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2019年第11期1378-1385,共8页
China Mechanical Engineering
基金
航空科学基金资助项目(20153021001)
关键词
热疲劳寿命
热作模具
热应力疲劳
热机械疲劳
thermal fatigue life
hot-working die
thermal-stress fatigue
thermal-mechanical fatigue
作者简介
苏楠,男,1989年生,博士研究生。研究方向为钛及钛合金高温成形、耐热合金服役。E-mail:mee.sunan@nuaa.edu.cn;通信作者:陈明和,男,1962年生,教授、博士研究生导师。研究方向为钛合金及难成形材料成形技术、材料成形性能分析与评价、板料成形CAE技术等。E-mail:meemhchen@nuaa.edu.cn。
