Application of finite element method to effect of weld overlay residual stress on probability of piping failure

Liu, Ru-Feng; Wang, Jong-Chang

doi:10.1016/j.ijpvp.2022.104812

Cited by 12 publications

(3 citation statements)

References 40 publications

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“…The FEM model supports the practicality of overlay welding for pressure pipe repair welding, which may result in compressive residual stress within the weld seam [10]. A weld overlay effectively prevents crack propagation in subsequent operations by applying compressive loads to the pipe's inner surface [11]. The nature of residual stress and its distribution depend on the type of material, heat source, number of thermal cycles, geometry, constraints, type of welding process, heat treatment procedure, and various other factors.…”

Section: Introductionmentioning

confidence: 79%

Numerical Simulation of the Effect of Fusion Welding Processes on Residual Stress in Stainless Steel Pipe Weld Joints Used in Fast Reactors

Ragavendran,

Vasudevan

2023

Engineering Science & Technology

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The main structural material used in the building of Fast Breeder Reactors (FBR) is stainless steel of type 316L(N). Finite Element Model (FEM)-based simulations were carried out to understand the effect of various welding processes on the residual stresses induced in 316L(N) stainless steel primary sodium-carrying pipes with an inner diameter of 208 mm and a wall thickness of 5.6 mm. The welding processes considered include multi-pass Tungsten Inert Gas (TIG) welding, A-TIG, laser, hybrid laser-TIG, and Hybrid laser-Metal Inert Gas (MIG). First, single or hybrid heat sources are chosen based on the welding process, and then weld bead profiles obtained during simulation are made to match with that of the actual weld bead profiles obtained during experiments. Then, the optimised heat source is employed for the thermal analysis. The thermal analysis output is then successively linked and provided as input to the mechanical analysis, which uses an isotropic hardening model to predict hoop and axial residual stresses in pipe weld joints. The results show that the A-TIG weld joint exhibited lower hoop stress (165 MPa at inner diameter and -2 MPa at outer diameter) in comparison with that of the other weld joints. The lower residual stress is attributed due to the straight-sided weld bead, lower peak temperature, and slower cooling rate of the A-TIG welding. Therefore, A-TIG welding is recommended among the chosen fusion welding processes for welding of 316L(N) stainless steel primary sodium carrying pipes to minimise the residual stresses and mitigate the premature failure of the pipe weld joints.

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Section: Introductionmentioning

confidence: 79%

Numerical Simulation of the Effect of Fusion Welding Processes on Residual Stress in Stainless Steel Pipe Weld Joints Used in Fast Reactors

Ragavendran,

Vasudevan

2023

Engineering Science & Technology

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“…Its function is to determine the effective geometry that can be used to carry out the piercing process [30]. The finite element method is a computer-based numerical method for solving engineering problems in userdefined planes or volume geometries [31].…”

Section: Piercing Tool Designmentioning

confidence: 99%

Increasing the Quantity and Quality of GeNose 19 Medical Device Gaskets Using Piercing Tools

Khoryanton,

Nugroho,

Fitrianti Sugiono

et al. 2024

Int. J. Adv. Sci. Eng. Inf. Technol.

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The Ge Nose C19 medical device gasket is a product from a manufacturing company in Yogya. Gaskets must be of good quality to ensure vacuum or prevent air leakage from entering the test chamber. The core problem in the production process is the quality problem of many rejects and the quantity not yet meeting the production target. The observation results show that the gasket reject problem is found in the four holes that are formed, which do not match the dimensions or are torn. Making four holes in the gasket made from neoprene rubber is done through a drilling process, which can risk tearing or damage. The type of drill bit used can affect the success of drilling gasket holes. The process of making four holes in the gasket using the piercing method is thought to be able to increase the quality and quantity of gasket products. This research aims to increase the quantity and quality of Ge Nose 19 medical device gaskets using a piercing tool. Research methods include problem identification, literature study, design, manufacture, and testing of piercing tools. The test parameters are time and product quality, namely the shape and position of the hole. The results of this research show a reduction in the cycle time of the hole-making process by 53.7%, so production capacity has increased by 51.8%. The quality of gasket production has increased; of the 40 samples tested, 0 gaskets were rejected.

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“…After conducting numerical study with ANSYS FE into the impact of tacking and root gap on the weld-induced residual stress of pipe flange joints, the authors used the BHD approach to validate their findings. [26] Welded pipe joints composed of 2.25Cr-1Mo ferritic steel and SS-316 steel had their surface residual stress distributed using the XRD technique. A106B C-steel and A240-TP304SS steel were used to examine the residual stress in a welded pipe connection [27].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Identifying some regularities of the heat transfer in the welded joint of SUS304 pipe using a numerical approach

Hasein,

Aned,

Razzaq

2023

EEJET

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In this study, an investigation into the impact of heat transmission in the welded junction of SUS304 pipe has been carried out with the use of a numerical method. An investigation was carried out by employing ANSYS’s static structural tools in conjunction with the software package’s thermal transient analysis. Based on the heat flow on the welding point, where the temperature reaches 507 °C within 200 mm of the end of the welded pipe, an examination into the efficiency of heat transfer has been carried out. This analysis was based on the heat flow on the welding point. As the total heat flux approaches 7.02e6 W∙m–2, studies have been conducted on the topic. There have been three types of directional heat flux measurements made (X, Y, and Z), with the numerical findings indicating that the X direction produces the most variable heat flow readings. These checks were performed in a variety of settings. These were chosen as the correct paths to go since they led directly to the source of the warmth. whereas the Z-axis permits the minimum amount of heat flow throughout the board. The damaged area identified on the trees that were still standing was factored into the calculation. To calculate the amount of residual stress, the Von Mises stress was applied repeatedly during the whole procedure. This tactic ended up being employed. Due to the tension caused by the pipe’s increased bending radius, the piece of pipe located 200 mm from the pipe’s distal end is the most vulnerable. The value was calculated to be 2.49e6 Pa when the temperature was increased to 500 °C.

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Application of finite element method to effect of weld overlay residual stress on probability of piping failure

Cited by 12 publications

References 40 publications

Numerical Simulation of the Effect of Fusion Welding Processes on Residual Stress in Stainless Steel Pipe Weld Joints Used in Fast Reactors

Numerical Simulation of the Effect of Fusion Welding Processes on Residual Stress in Stainless Steel Pipe Weld Joints Used in Fast Reactors

Increasing the Quantity and Quality of GeNose 19 Medical Device Gaskets Using Piercing Tools

Identifying some regularities of the heat transfer in the welded joint of SUS304 pipe using a numerical approach

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