文献类型：期刊文献

英文题名：Creep crack growth prediction and assessment incorporating constraint effect for pressurized pipes with axial surface cracks

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, Minist Educ, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China

年份：2016

卷号：154

起止页码：92

外文期刊名：ENGINEERING FRACTURE MECHANICS

收录：;EI(收录号：20160401844902);WOS:【SCI-EXPANDED(收录号:WOS:000370373600008)】；

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 effect; Creep crack growth; Two-parameter; Single-parameter; Pressurized pipes

摘要：Creep crack growth life is firstly predicted and assessed by two-parameter concept to incorporate constraint effect for pressurized pipes with inner axial surface cracks. The prediction and assessment results are compared with those based on conventional single-parameter C* and finite element calculations. For shallower and shorter cracks, the life assessments based on single-parameter C* are excessively conservative. To reduce excess conservativity, it is strongly recommended to incorporate constraint effect. With decreasing initial crack sizes, the benefits gained from two-parameter assessments increase. The crack growth profile may also be correctly predicted by two-parameter calculations. The C* calculation of reference stress method leads to extra conservativity. (C) 2016 Elsevier Ltd. All rights reserved.