• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

›› 1988, Vol. 24 ›› Issue (1): 30-36.

• 论文 • 上一篇    下一篇

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时间相关疲劳寿命预测应变能新模型

何晋瑞;董照钦;段作祥;宁友连   

  1. 北京航空材料研究所
  • 发布日期:1988-01-01

STRAIN ENERGY MODEL AND LIFE PREDICTIABILITY OF TIME-DEPENDENT FATIGUE

He Jinrui;Dong Zhaoquin;Duan Zuoxiang;Ning Youlian   

  1. Beijing Institute of Aeronautical Materials
  • Published:1988-01-01

摘要： 本文论述的应变能模型（SEM）包含了作者提出的应变能力区分法（SEP）和应就能频率分离法（SEFS）。SEP和SEFS是著名的应变范围区分法（SRP）、频率分离法（FS）和Ostergren模型的综合与改进。比较了上述五种寿命预测方法对三种不同强度和延性材料1Cr18Ni18Ti、GH36和GH33A（包括三种不同工艺条件）的蠕变-疲劳寿命预测能力，SEEP与SEFS比其他三种方法较佳。最后，对GH33A在700℃下的时间相关疲劳断口分析表明与其寿命长短密切相关。

关键词: 镍基合金, 蠕变-疲劳-环境交互作用, 时间相关疲劳, 寿命预测, 应变能模型

Abstract: The Strain .Energy Model (SEM), including both Strain Energy Partitioning (SEP) and Strain Energy Frequency Separation (SEFS) by authors which are the synthesis and modification of Strain Range Partitioning (SRP), Frequency Separation (FS) and Ostergren Model is presented. By comparison the abilities of the above five methods to predict the creep-fatigue lives of three different strength and ductility materials 1Cr18Ni 9Ti, GH36 and GH33A with three different processings, it would seem that SEP and SEFS have rather better predictiabilities than the others and more significant physical meanings. Finally, the time dependent fatigue fracture of GH33A at 7000C showed the close dependence with the lives of it.

Key words: 镍基合金, 蠕变-疲劳-环境交互作用, 时间相关疲劳, 寿命预测, 应变能模型

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