Acta Metallurgica Sinica (English Letters) ›› 2011, Vol. 24 ›› Issue (2): 169-174.DOI: 10.11890/1006-7191-112-169

• 研究论文 • 上一篇    

A Damage-coupled Multi-axial Time-dependent Low Cycle Fatigue Failure Model for SS304 Stainless Steel at High Temperature

刘宇杰   

  1. 西南交通大学力学与工程学院
  • 收稿日期:2010-12-01 修回日期:2011-02-27 出版日期:2011-04-25 发布日期:2011-04-20
  • 通讯作者: 刘宇杰

A damage-coupled multi-axial time-dependent low cycle fatigue failure model for SS304 stainless steel at high temperature

Yujie LIU, Qing GAO and Guozheng KANG   

  1. School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China
  • Received:2010-12-01 Revised:2011-02-27 Online:2011-04-25 Published:2011-04-20
  • Contact: Yujie LIU

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Abstract: Based on the time-dependent strain cyclic characteristics and fatigue behaviors of SS304 stainless steel under multi-axial cyclic loading at 700℃, and in the frame of unified visoco-plastic cyclic constitutive model and continuum damage mechanics theory, the damage-coupled multi-axial time-dependent constitutive model and fatigue failure model were proposed. In the model, the evolution equation of damage was introduced in and the time-dependent effects, e.g. holding time, loading rate, were taken into account. The model was applied to the simulation of whole-life cyclic deformation behaviors and prediction of LCF life for SS304 stainless steel in multi-axial time-dependent low cycle fatigue tests. It is shown that the simulated results agree well with experimental ones.

Key words: SS304 stainless steel, Constitutive model, Low cycle fatigue, Failure model, Damage-coupled, High temperature