Modeling of Low Cycle Behavior of P92 Steel Based on Cyclic Plasticity Constitutive Equations

摘要：

　　Strain controlled uniaxial low cycle fatigue (LCF) tests of P92 steel were conducted at strain amplitudes of 0.4%, 0.6% and 0.8% in fully reversed manner with strain rate of 1.0× 10-3s-1 at high temperature of 650 ℃.Cyclic softening behavior was studied and time-independent cyclic plasticity model was used to represent the cyclic mechanical behavior of this steel.Material parameters were determined step by step at higher strain amplitude of 0.8%, experimental data with lower strain amplitude were used to validate the extrapolation of the model.Comparison of the simulated and experimental results shows that the proposed model can give a reasonable prediction of stress-strain hysteresis loop for P92 steel at high temperature.

关键词： Low cycle fatigue Cyclic softening Time-independent cyclic plasticity model P92 steel

作者: Xiaowei Wang Jianming Gong Yong Jiang Yanping Zhao Minghao Yu

作者单位: College of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China

会议类型: 国际会议

会议名称: 2014 International Symposium on Structural Integrity,ISSI2014(2014国际结构完整性学术会议)

会议地点: 兰州

会议语种:英文

页码: 163-168

在线出版日期: 2014-08-20（万方平台首次上网日期，不代表论文的发表时间）