Low-Cycle Tearing in a Deep-Water Buckle-Arrestor Assembly Girth Weld During S-Lay Installation

被引：1

作者：

Selker, Ruud ^{[1
]}

Liu, Ping ^{[1
]}

Jurdik, Erich ^{[2
]}

Chaudhuri, Jay ^{[2
]}

Fonzo, Andrea ^{[3
]}

di Biagio, Massimo ^{[3
]}

机构：

[1] INTECSEA, Delft, Netherlands

[2] South Stream Transport BV, Amsterdam, Netherlands

[3] RINA Consulting Ctr Sviluppo Mat, Rome, Italy

来源：

INTERNATIONAL JOURNAL OF OFFSHORE AND POLAR ENGINEERING | 2019年 / 29卷 / 01期

关键词：

Fracture; SENT testing; segment testing; pipelines; ductile tearing; low-cycle fatigue; installation;

D O I：

10.17736/ijope.2019.et04

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

S-Lay installation of inline buckle arrestors in deep water can introduce plastic strain to girth welds. The welds are repeatedly loaded by large-strain cycles when traversing the stinger. A material-testing program was launched to assess the impact of this load sequence on the welds' integrity. It is essential to establish the correct mechanism of crack growth caused by a limited number of sequential large-strain cycles. Segment specimens with increased specimen "daylight" length were tested. Fracture morphologies of ductile tearing and fatigue growth were distinguished; ductile tearing was identified only for the first load cycle, whereas subsequent cycles were dominated by fatigue crack growth.

引用

页码：62 / 69

页数：8