Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Fracture Behavior Analysis of Mitred Welded Joint of High Grade Steel Pipeline
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.
Fracture Behavior Analysis of Mitred Welded Joint of High Grade Steel Pipeline
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.
Fracture Behavior Analysis of Mitred Welded Joint of High Grade Steel Pipeline
Advances in Engineering res
Ding, Faxing (Herausgeber:in) / Hou, Xiaomeng (Herausgeber:in) / Raman, Sudharshan N. (Herausgeber:in) / Zeng, Junjie (Herausgeber:in) / Chen, Jian (Autor:in) / Zhang, Haonan (Autor:in) / Yang, Yue (Autor:in) / Chen, Yuanhong (Autor:in) / Wang, Feng (Autor:in) / Wang, Hao (Autor:in)
International Conference on Civil Engineering Structures and Concrete Materials ; 2024 ; Dali, China
31.10.2024
9 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch