COMPARISON OF FATIGUE OF GIRTH-WELDS IN FULL-SCALE PIPES AND SMALL-SCALE STRIP SPECIMENS

被引：0

作者：

Maddox, Stephen J. ^{[1
]}

Zhang, Yan-Hui ^{[1
]}

机构：

[1] TWI, Cambridge CB21 6AL, England

来源：

PROCEEDINGS OF THE 27TH INTERNATIONAL CONFERENCE ON OFFSHORE MECHANICS AND ARCTIC ENGINEERING - 2008, VOL 5 | 2008年

关键词：

fatigue; testing; steel; girth weld; pipe; fatigue limit; fatigue crack growth; fracture mechanics; residual stress;

D O I：

暂无

中图分类号：

U6 [水路运输]; P75 [海洋工程];

学科分类号：

0814 ; 081505 ; 0824 ; 082401 ;

摘要：

As part of a study of fatigue in girth-welded steel pipes, tests were performed under constant amplitude loading on both full-scale pipes and strip specimens cut from such pipes. Significant differences were found in their high-cycle fatigue lives, which extended to around 108 cycles, and apparent fatigue endurance limits, the small-scale strips displaying superior fatigue properties. The reasons for this were investigated considering the fatigue crack initiation site, weld geometry, type of pipe, loading conditions, residual stresses, the re-testing of unfailed specimens and size effects. Fracture mechanics fatigue crack growth calculations were also performed using a K solution specially calculated by FEA for the girth weld. Conclusions are drawn about the suitability of strip fatigue test specimens for representing the fatigue behaviour of full-scale girth welded pipes and the scope for re-testing unfailed full-scale pipes.

引用

页码：75 / 85

页数：11

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