Using a unified model of stress relaxation to predict creep behavior
(0) An estimation method to predict creep performances of high temperature structural materials has been proposed. A Stress relaxation equation is obtained by fitting stress relaxation testing curves and modifying Tanaka-Ohba reloading stress relaxation constitutive equation. Based on the relationship between stress relaxation and creep, a simplified and unified prediction equation of creep is deduced. The method is to use the unified equation to derive creep strain rates or creep strain vs. time curves from stress relaxation measurements through some specified time increments. In order to validate the approach, the predicted results are compared to the experimental results of uni-axial isothermal creep tests conducted on lCrlONiMoW2VNbN steel. Good agreement between results of creep tests and the predicted results indicates that the developed method can be recommended in the creep behavior evaluation of high temperature materials.
Stress relaxation Creep Relaxation model Data conversion Life prediction
Jinquan Guo Wuzhou Meng Long Tian Huichao Shi Bo Liang
Laboratory of Mechanical Structural Strength, Anyang Institute of Technology, Anyang 455000, China
国际会议
2012 International Symposium on Structural Integrity 2012国际结构完整性学术研讨会 ISSI 2012
济南
英文
295-299
2012-10-31（万方平台首次上网日期，不代表论文的发表时间）