原子能科学技术2018，Vol.52Issue(4)：677-684,8.DOI:10.7538/yzk.2017.youxian.0441
多轴疲劳模型对比研究及其在核电结构热疲劳寿命预测中的应用
Comparative Investigation of Multiaxial Fatigue Model and Application in Thermal Fatigue Life Prediction of Structure in Nuclear Power Plant
摘要
Abstract
The problem of thermal fatigue cracks discovered in the pipes of mixing zones of cold and hot water in residual heat removal systems of pressurized water reactors is related to the safety of nuclear reactors. In this paper, a methodology for predicting the multiaxial fatigue life by using a reference curve fitted by uniaxial fatigue experimental data was adopted. For 304L stainless steel, which was the material of the pipes of mixing zones of cold and hot water in residual heat removal systems, the fatigue lives were predicted by using Dang Van, Matake and Fatemi-Socie criteria based on the fatigue experimental data collected from literature and the results of prediction were compared. The thermal fatigue lives of the pipe were computed by using Dang Van, Matake and Fatemi-Socie criteria based on a simplified 3-dimensional finite element model of the pipes of mixing zones of cold and hot water in residual heat removal systems, and the numerical results were compared with the experimental results. The results show that Fatemi-Socie criterion, which is based on strain(correlated by mean stress), is more suitable for the 304Lstainless steel. Moreover, the predicted thermal fatigue life using Fatemi-Socie criterion is more reasonable than those using Dang Van and Matake criteria.关键词
多轴疲劳/热疲劳/304L不锈钢/余热排出系统Key words
multiaxial fatigue/thermal fatigue/304Lstainless steel/residual heat removal system分类
能源科技引用本文复制引用
雷柏茂,李骞,黄创绵,王春辉..多轴疲劳模型对比研究及其在核电结构热疲劳寿命预测中的应用[J].原子能科学技术,2018,52(4):677-684,8.基金项目
国家重点研发计划"重大科学仪器设备开发"重点专项资助项目(2017YFF0104203) （2017YFF0104203）
