文献类型：期刊文献

英文题名：Effects of residual stress on creep damage and crack initiation in notched CT specimens of a Cr-Mo-V steel

作者：Chen, L. Y.[1];Wang, G. Z.[1];Tan, J. P.[1];Xuan, F. Z.[1];Tu, S. T.[1]

机构：[1]E China Univ Sci & Technol, Minist Educ, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China

年份：2013

卷号：97

期号：1

起止页码：80

外文期刊名：ENGINEERING FRACTURE MECHANICS

收录：;EI(收录号：20131016078349);WOS:【SCI-EXPANDED(收录号:WOS:000316092200006)】；

基金：This work was financially supported by the National Natural Science Foundation (51075149, 50835003), the National High Technology Research and Development Program (2009AA04Z409), and the Fundamental Research Funds for the Central Universities of China.

语种：英文

外文关键词：Residual stress; Creep damage; Creep crack initiation; Ductility exhaustion model; Notched CT specimen

摘要：In this work, the effects of residual stress on creep damage and crack initiation were investigated by numerical analyses. Two cases of residual stress alone and residual stress combined with primary load were analyzed. The results show that larger residual stress relaxation occurs at initial creep stage, and creep strain and damage are accumulated ahead of notches during residual stress relaxation. It has been demonstrated that the effects of residual stress on creep crack initiation time are related to the creep ductility of materials and primary load levels. This was analyzed by the change in residual stress relaxation time in materials. (C) 2012 Elsevier Ltd. All rights reserved.