A life prediction model of fatigue-creep interaction with stress controlled fatigue

被引：0
|
作者：
Fan, Zhichao [1 ]
Chen, Xuedong [1 ]
Chen, Ling [1 ]
Jiang, Jialing [1 ]
机构：
[1] Natl Technol Res Ctr PVP Safety Engn, Hefei 230031, Peoples R China
来源：
MULTISCALING ASSOCIATED WITH STRUCTURAL AND MATERIAL INTEGRITY UNDER ELEVATED TEMPERATURE | 2006年
关键词：
stress control; fatigue; cyclic creep; creep; mean strain rate; life prediction;
D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Based on the ductility dissipation theory and effective stress concept of continuum damage mechanics (CDM), the mean strain rate at half life is used as control parameter to propose a new model for stress controlled fatigue or fatigue-creep life prediction. The model not only considers the interaction between cyclic and static creep, but also considers the effect of mean stress. Test data have been assessed on continuous stress fatigue test data or fatigue-creep test data with hold time of three low alloy steels (16MnR steel, ASTM A-516 Gr.70 steel. 1.25Cr0.5Mo steel) at RT or high temperature. Most of the life prediction results are within a factor of +/- x 1.5. This model is suitable for stress controlled fatigue or fatigue-creep life prediction of ductile material.
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页码：199 / 204
页数：6
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