文献类型：期刊文献

英文题名：Effect of constraint on creep crack initiation time in test specimens in ASTM-E1457 standard

作者：He, J. Z.[1];Wang, G. Z.[1];Tu, S. T.[1];Xuan, F. Z.[1]

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

年份：2017

卷号：176

起止页码：61

外文期刊名：ENGINEERING FRACTURE MECHANICS

收录：;EI(收录号：20171003422603);WOS:【SSCI(收录号:WOS:000401045800004)，SCI-EXPANDED(收录号:WOS:000401045800004)】；

基金：This work was financially supported by the Projects of the National Natural Science Foundation of China (51375165, 51575184, 51325504).

语种：英文

外文关键词：Constraint; Creep crack initiation; ASTM-E1457; Specimen geometry; Side groove

摘要：The creep crack initiation (CCI) time of six specimen geometries in ASTM E1457 standard has been predicted by using numerical simulations, and the constraint effect on CCI time was analyzed. The results show the specimens with different geometries, size ranges and side-grooves recommended by ASTM-E1457 produce different CCI time data due to different constraint levels. With increasing constraint levels in specimens, the CCI time is reduced. The quantitative correlation formulas of CCI time with creep constraint parameters have been established, and they may be applied in CCI life assessment of high temperature components for accounting for constraint effect and improving accuracy. (C) 2017 Elsevier Ltd. All rights reserved.