文献类型：期刊文献

英文题名：Creep constraint analysis and constraint parameter solutions for circumferential surface cracks in pressurized pipes

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

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

年份：2015

卷号：148

起止页码：1

外文期刊名：ENGINEERING FRACTURE MECHANICS

收录：;EI(收录号：20153901301106);WOS:【SCI-EXPANDED(收录号:WOS:000365553500001)】；

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; Circumferential surface crack; Pressurized pipes; Creep crack growth rate

摘要：Creep crack-tip constraints for inner circumferential surface cracks in pressurized pipes have been analyzed by three-dimensional finite element method and the constraint parameter R* solutions have been obtained for different pipe geometries and crack sizes. It has been shown that the constraint level of circumferential cracks is lower than that of axial cracks, and the constraint effects need to be considered in creep life assessments of pressurized pipes. The benefits from incorporating constraint effects are greater for the circumferential cracks than for the axial cracks and for the shallower and shorter cracks than for the deeper and longer cracks. (C) 2015 Elsevier Ltd. All rights reserved.