文献类型：期刊文献

英文题名：Creep constraint analysis and constraint parameter solutions for axial semi-elliptical surface cracks in pressurized pipes

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

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

年份：2014

卷号：132

起止页码：1

外文期刊名：ENGINEERING FRACTURE MECHANICS

收录：;EI(收录号：20144600200620);WOS:【SCI-EXPANDED(收录号:WOS:000346396500001)】；

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

语种：英文

外文关键词：Creep constraint; Constraint parameter solutions; Axial surface crack; Pressurized pipes; Creep crack growth rate

摘要：Creep crack-tip constraints for axially cracked pipes with different geometries and sizes of semi-elliptical surface cracks have been analyzed by three-dimensional finite element method and the constraint parameter solutions were obtained. It has been shown that the constraint levels of cracks in the pipes increase with increasing crack depths and lengths. The constraint levels and creep crack growth rates of all cracks in the pipes are lower than those of the standard compact tensile specimens. Without considering the creep constraint effects, the excessive conservatism may be produced in creep life assessments of the axially cracked pipes. (C) 2014 Elsevier Ltd. All rights reserved.