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Advanced Finite Element Analysis and Fracture Control in Steel Pipelines Under Hydrogen Influence

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Simulation and Design".

Deadline for manuscript submissions: 10 May 2025 | Viewed by 935

Special Issue Editors


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Guest Editor
School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu 610500, China
Interests: structural integrity management; earthquake engineering; reliability-based and risk-informed uncertain modeling
Special Issues, Collections and Topics in MDPI journals
1. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2. School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu 610500, China
Interests: pipeline defect assessment; risk-based pipeline integrity management; pipeline engineering
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The integrity of steel pipelines in hydrogen environments is critical for safe energy transportation, necessitating advanced fracture control and finite element analysis (FEA). This special issue aims to explore the latest advancements in finite element analysis (FEA) and fracture control techniques, focusing on the challenges posed by hydrogen-induced failures in steel pipelines.

Research in steel pipeline fracture control has evolved significantly, with initial studies focusing on mechanical properties and material behavior under various environmental conditions. The introduction of hydrogen environments has added complexity, necessitating more sophisticated analytical models.

Recent studies have emphasized the role of microstructural factors in hydrogen embrittlement alongside the development of predictive FEA models that incorporate these variables. Advanced simulation tools and experimental validation are now integral to understanding fracture mechanisms in hydrogen-exposed steels.

This special issue seeks to compile cutting-edge research on the finite element analysis of steel pipelines under hydrogen environments, addressing fracture mechanics, microstructural influences, material degradation, and innovative fracture control strategies. Topics of interest include but are not limited to, hydrogen embrittlement, crack propagation modeling, life prediction, and the development of new steel grades with enhanced resistance to hydrogen-induced failures.

We welcome original research articles, comprehensive reviews, and case studies that offer new insights into the application of finite element methods and fracture mechanics in steel pipelines exposed to hydrogen. Manuscripts that combine experimental results with advanced simulation techniques or that propose novel methodologies for fracture control and failure prevention in hydrogen environments are particularly welcome.

You may choose our Joint Special Issue in Applied Sciences and Joint Special Issue in Processes.

Dr. Yihuan Wang
Dr. Guojin Qin
Prof. Dr. Ying Wu
Guest Editors

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Keywords

  • hydrogen embrittlement
  • finite element analysis (FEA)
  • steel pipelines
  • fracture mechanics
  • crack propagation
  • material degradation
  • hydrogen-induced failures
  • microstructural influence
  • life prediction
  • fracture control strategies

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Published Papers (1 paper)

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Research

24 pages, 16143 KiB  
Article
Numerical Study on the In-Service Welding Stress of X80 Steel Natural Gas Pipeline
by Haiping Tang, Yaping Ding, Guangyou Qiu, Pei Yi and Ziguang Liu
Materials 2025, 18(3), 719; https://doi.org/10.3390/ma18030719 - 6 Feb 2025
Viewed by 547
Abstract
In this study, the welding stress of in-service welding on the X80 steel pipeline was investigated using the 3D finite element method. The parameters of heat source and axial and hoop welding stress were verified in the experiment. As shown in the results, [...] Read more.
In this study, the welding stress of in-service welding on the X80 steel pipeline was investigated using the 3D finite element method. The parameters of heat source and axial and hoop welding stress were verified in the experiment. As shown in the results, in the heat-affected-zone (HAZ) location of the pipeline and sleeve, the outer wall was predominantly under compressive stress, while the inner wall was mainly subjected to tensile stress. The hoop stress (σh) is greater than the axial stress (σa). The maximum hoop stress is primarily concentrated at the connection point between the fillet weld and the sleeve, and its value exceeds the yield strength of X80 steel. Excluding the start–end region, the axial stress distributed in the circumferential direction remains at an almost constant value. The hoop stress values exhibit an approximately symmetric distribution, with relatively higher values at 0° and 180° and relatively lower values at 90° and 270°. Compared with axial stress, the influence of natural gas pressure and flow rate on the hoop stress of the pipeline is more pronounced. When the natural gas pressure increases from 0.5 MPa to 2.5 MPa and the flow rate increases from 1 m/s to 20 m/s, the hoop stress of the pipeline increases by 3.18% and 15.42%, respectively. Moreover, the influence of the preheating temperature on the axial stress of the sleeve is highly prominent. When the preheating temperature is elevated from 20 °C to 300 °C, the axial welding stress of the sleeve increases by 115.3%. These results indicate that maintaining the natural gas pressure at 1 MPa, keeping the flow rate below 12 m/s, and controlling the preheating temperature at approximately 50 °C can enhance the performance of the fillet weld during the in-service welding of X80 steel pipelines. Full article
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