A modified hybrid method to estimate fracture resistance curve for pipes with a circumferential surface crack

被引：15

作者：

Parool, Neha ^{[1
]}

Qian, Xudong ^{[1
]}

Koh, C. G. ^{[1
]}

机构：

[1] Natl Univ Singapore, Ctr Offshore Res & Engn, Dept Civil & Environm Engn, 1 Engn Dr 2, Singapore 117576, Singapore

来源：

ENGINEERING FRACTURE MECHANICS | 2018年 / 188卷

关键词：

Fracture resistance; Energy release rate; Surface cracked pipe; Hybrid method; J-R curve; Single edge notch tension specimen; HIGH-PRESSURE PIPELINES; DESIGNED TEST SPECIMENS; STAINLESS-STEEL PIPE; R-CURVES; PART II; CONSTRAINT; MECHANICS; TOUGHNESS; BEHAVIOR; TENSION;

D O I：

10.1016/j.engfracmech.2017.05.046

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This study presents a modified hybrid method to estimate the fracture resistance curve for pipes with a circumferential surface crack. The hybrid method combines a single experimental specimen with an extending crack and several numerical models with a stationary crack of different sizes, to calculate the fracture resistance directly from the pipe specimen. The strain energy used in estimating the fracture resistance derives from the load and crack-mouth opening displacement curve. The proposed method leads to good agreement in the estimated fracture resistance curves with those based on the unloading-compliance eta-approach, for both fracture specimens and for circumferentially surface-cracked pipes. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：1 / 19

页数：19

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