Study on crack growth path of API-5L X80 welded joints based on inhomogeneous mechanical properties

被引：1

作者：

Xue, He ^{[1
]}

Wang, Rongxin ^{[1
]}

Wang, Zheng ^{[1
]}

Wu, Jun ^{[1
]}

Hao, Xibin ^{[1
]}

机构：

[1] Xian Univ Sci & Technol, Sch Mech Engn, 58 Yanta Middle Rd, Xian 710054, Peoples R China

来源：

STRUCTURES | 2024年 / 70卷

基金：

中国国家自然科学基金;

关键词：

API-5L X80 pipeline steel; Welded joints; Inhomogeneous mechanical properties; Extended finite element method; Crack growth path; FINITE-ELEMENT-METHOD; STRESS-CORROSION CRACKING; PIPELINE STEEL; MICROSTRUCTURE; BEHAVIOR; OIL; MO;

D O I：

10.1016/j.istruc.2024.107713

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study analyses the effect of inhomogeneous mechanical properties on the stress-strain field of crack tips and crack growth path at different locations of API-5L X80 welded joints. First, the inhomogeneous mechanical properties and microstructure of welded joints were analyzed in detail in this paper. Then, the ABAQUS subroutine USDFID was developed to ensure the continuity variation of the mechanical properties of the material in this region. Finally, the cracks in the welded joints were analysed using the extended finite element method (XFEM). The findings demonstrate that the inhomogeneous mechanical properties of welded joints give rise to crack growth path that are deflected towards the weld metal region, exhibiting the greatest rate of growth in this region.

引用

页数：10

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