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

作　　者：Yujie LIU Qing GAO Guozheng KANG 

机构地区：[1]School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China

出　　处：《Acta Metallurgica Sinica(English Letters)》2011年第2期169-174,共6页金属学报（英文版）

基　　金：supported by the Fundamental Research Funds for the Central Universities (No.SWJTU09ZT35);National Science Fund for Distinguished Young Scholars of China (No.11025210)

摘　　要：Based on the time-dependent strain cyclic characteristics and fatigue behaviors of SS304 stainless steel under multi-axial cyclic loading at 700 ？ C, 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 multiaxial time-dependent low cycle fatigue tests. It is shown that the simulated results agree well with experimental ones.Based on the time-dependent strain cyclic characteristics and fatigue behaviors of SS304 stainless steel under multi-axial cyclic loading at 700 ？ C, 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 multiaxial time-dependent low cycle fatigue tests. It is shown that the simulated results agree well with experimental ones.

关 键 词：SS304 stainless steel Constitutive model Low cycle fatigue Failure model Damage-coupled High temperature 

分 类 号：O344[理学—固体力学] V263.6[理学—力学]