Average creep rate model for prediction of stress relazation

摘要：

An estimation method is proposed to predict stress relaxation performance of structural materials.An average creep rate conversion model based on Schlottner-Seeley creep assessment procedure and creep damage equations has been developed by considering the relationship between two stages of stress relaxation corresponding to the first and second creep stages respectively.The macroscopical effect of these two kinds of creep rate on stress relaxation is investigated at various stresses.The integrated methodology for prediction of stress relaxation is established and compared with the experimental results.The uniaxial isothermal stress relaxation tests are conducted on lCrl0NiMoW2VNbN steel with the same temperature as the normal creep tests.Validation results indicate that the prediction by the developed model has a good consistence with the measured data and thus can be recommended in stress relaxation performance prediction of high temperature materials.

关键词： Creep-relazation conversion Stress relazation performance Prediction method Average creep rate model

作者: Jinquan Guo Fu-Zhen Xuan Zhengdong Wang Shan-Tung Tu

作者单位: Department of Mechanical Engineering,Anyang Institute of Technology,Anyang 455000,China MOE Key Lab. MOE Key Lab.of Safety Science of Pressurized System,East China University of Science and Technology,

会议类型: 国际会议

会议名称: 国际断裂力学2009年会

会议地点: 成都

会议语种:英文

页码: 239-243

在线出版日期: 2009-10-16（万方平台首次上网日期，不代表论文的发表时间）