An equivalent strain energy density life prediction model
Based on the strain energy density theory, the equivalent strain energy density at half life is used as a control parameter, and a new life prediction model for stress controlled fatigue or fatigue-creep interaction is proposed in this paper. The model not only considers the cumulated plastic damage induced by fatigue, but also considers the ductility exhaustion damage caused by cyclic and static creep. This model has been assessed by stress controlled continuous fatigue test data and fatigue-creep test data with hold time for three types of low alloy steels at different temperatures, and most of the life prediction results are within a factor of ±2 to the test ones. The results indicate that this model is applicable for predictions of stress controlled fatigue or fatigue-creep interaction, the same time, the fatigue damage and cyclic creep or static creep damage can also be reflected quantitatively.
Fatigue Creep Cyclic creep Life prediction Strain energy density
Zhichao Fan Xuedong Chen Ling Chen Jialing Jiang
Hefei General Machinery Research Institute, National Technology Research Center on PVP Safety Engine Research Institute of Chemical Machinery and Equipment, Zhejiang Univ., Hangzhou 310027, China
国际会议
国际断裂力学2007年会(Fracture Mechanics and Applications 2007)
长沙
英文
277-282
2007-11-01（万方平台首次上网日期，不代表论文的发表时间）