文献类型：期刊文献

英文题名：Correlation of creep crack-tip constraint between axially cracked pipelines and test specimens

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

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, MOE Key Lab Pressurized Syst & Safety, Shanghai 200237, Peoples R China

年份：2012

卷号：98

起止页码：16

外文期刊名：INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING

收录：;EI(收录号：20123615396922);WOS:【SCI-EXPANDED(收录号:WOS:000308847500003)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Nos.50835003, 51075149), and the National High Technology Research and Development Program of China (No. 2009AA044803).

语种：英文

外文关键词：Creep; Constraint; Crack; Axially cracked pipeline; SENT specimen; Stress

摘要：In this paper, based on the creep constraint parameter R, the creep crack-tip constraints in axially cracked pipelines and various test specimens have been analyzed under conditions of plane strain and steady-state creep, and correlation of the constraint between the cracked pipes and test specimens has been investigated. The creep crack-tip constraint of the single-edge notched tension (SENT) specimen is close to that of axially cracked pipes. The pin-loaded SENT specimen (SENTp) with a/W = 0.35 and 0.05 W loading point offset provides a closely matched creep crack-tip constraint with the axially cracked pipes. It will be more accurate if the creep crack growth rate and creep fracture toughness data measured by the SENTp specimen are used in integrity assessment of axially cracked pipes. The results provide a strong support for use of constraint-designed specimens in creep failure assessments of pressurized pipes at high temperature. (C) 2012 Elsevier Ltd. All rights reserved.