Numerical Investigation on Plastic Strain Correction Factor in Simplified Elastic-Plastic Fatigue Analysis

摘要：

　　A plastic strain correction factor is used in a simplified elastic-plastic fatigue analysis of nuclear power plant components.Numerical investigation on the plastic strain correction factor is presented for the case of the primary and secondary stress range exceeding three times the design stress intensity value under thermal-mechanical loadings.The plastic strain correction factor was computed separately by following the RCC-M code and applying the elastic-plastic finite element analysis.The influence of loading ratio,loading controlled mode and ambient temperature on the plastic strain correction factor was discussed.It was shown that the plastic strain correction factor computed from the RCC-M code is not as conservative as that from the complete elastic-plastic finite element analysis when the primary plus secondary stress range is close to three times the design stress intensity value.However,it is too conservative when the primary plus secondary stress range is more than three times the design stress intensity value multiplying parameter m (use in RCC-M code).Additionally,a new formula of plastic strain correction factor was proposed to provide a complete envelope curve to the entire primary plus secondary stress range.

关键词： Plastic strain correction factor cyclic plasticity thermo-mechanical loading fatigue analysis

作者: Kan Qianhua Guo Sujuan Li Jian Guozheng Kang Wenyi Yan

作者单位: Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province,School of Mechanics and En Key Laboratory of Safety Science of Pressurized System,MOE,East China University of Science and Tech Department of Mechanical and Aerospace Engineering,Monash University,Clayton,VIC3800,Australia

会议类型: 国际会议

会议名称: 2016 International Symposium on Structural Integrity，ISSI—2016(2016国际结构完整性研讨会)

会议地点: 天津

会议语种:英文

页码: 226-230

在线出版日期: 2016-05-26（万方平台首次上网日期，不代表论文的发表时间）