中国机械工程 ›› 2011, Vol. 22 ›› Issue (7): 812-814.

• 机械基础工程 • 上一篇    下一篇

基于损伤力学阐释Manson-Coffin低周疲劳模型

郑战光;蔡敢为;李兆军;徐细勇
  

  1. 广西大学,南宁,530004
  • 出版日期:2011-04-10 发布日期:2011-04-15
  • 基金资助:
    广西科学基金资助项目(桂科自0832030);广西制造系统与先进制造技术重点实验室资助项目(桂科能0842006-005-Z) 
    Guangxi Provincial Science Foundation of China(No. 0832030)

Interpretation of Manson-Coffin Model of Low Cycle Fatigue Based on Damage Mechanics

Zheng Zhanguang;Cai Ganwei;Li Zhaojun;Xu Xiyong
  

  1. Guangxi University, Nanning, 530004
  • Online:2011-04-10 Published:2011-04-15
  • Supported by:
     
    Guangxi Provincial Science Foundation of China(No. 0832030)

摘要:

为验证Manson-Coffin低周疲劳模型经验公式,采用损伤力学基础理论,并结合Ramberg-Osgood幂率强化准则,以塑性应变幅值为损伤演化的控制量,推导建立了低周疲劳损伤力学模型。比较两者后可得:在比例载荷的条件下,
Manson-Coffin低周疲劳模型与疲劳损伤力学模型是等价的,且Manson-Coffin公式是疲劳损伤力学模型的一种特殊的退化形式。

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Abstract:

Manson-Coffin model of low cycle fatigue is a classical empirical formula, and its mechanical implications are very pool. Based on damage mechanics and Ramberg-Osgood rule, a damage mechanics model of low cycle fatigue was deduced under the dominate variable of plastic strain amplitude. By the comparison with Manson-Coffin model, it is shown that they are equivalent under proportional loading and Manson-Coffin model is a special degenerative form of damage mechanics fatigue model.

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