Fracture Behavior Analysis of Mitred Welded Joint of High Grade Steel Pipeline

DOI

10.2991/978-94-6463-564-5_8How to use a DOI?

Keywords

mitred welded joint; mitre angle; crack driving force; Strength matching coefficient

Abstract

Crack is a high-risk engineering disease in civil engineering. It is necessary to master the specific types and causes and strengthen crack control. Pipeline welded joint is one of the most prone to crack position. Pipeline structures are widely used in civil engineering, especially in the field of oil and gas transportation. In the installation of long-distance oil and gas pipelines, there are often mitred joints to meet different laying requirements. A parametric numerical model of mitred joints with crack defects was established based on Python-Abaqus, the Key Hole model was used to accurately simulate the passivation behavior of crack tip during crack opening. The results show that for the inclined joint of high steel grade pipeline, under the same load, the crack surface of the outer wall of the bottom of the mitred joint is more prone to fracture failure than the cracks at other positions. The larger mitre angle and the low strength matching of the material will lead to a sharp rise in the crack driving force at the girth weld, and the mitred joint is more prone to cracking failure. Among them, the mitre angle and crack position have the most obvious influence on the crack driving force. It is an effective method to improve the bearing capacity of the inclined nozzle by limiting the angle of the inclined joint and ensuring the high matching of the strength.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Jian Chen
AU  - Haonan Zhang
AU  - Yue Yang
AU  - Yuanhong Chen
AU  - Feng Wang
AU  - Hao Wang
AU  - Xiaoben Liu
PY  - 2024
DA  - 2024/10/31
TI  - Fracture Behavior Analysis of Mitred Welded Joint of High Grade Steel Pipeline
BT  - Proceedings of the 2024 International Conference on Civil Engineering Structures and Concrete Materials (CESCM 2024)
PB  - Atlantis Press
SP  - 68
EP  - 76
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-564-5_8
DO  - 10.2991/978-94-6463-564-5_8
ID  - Chen2024
ER  -