Weld characteristics of non-axisymmetrical butt welded branch pipe T-joints using finite element simulation and experimental validation

Velaga, Satish K.; Kumar, Sudhir; Ravisankar, A.; Venugopal, S.

doi:10.1016/j.ijpvp.2017.01.004

Cited by 10 publications

(5 citation statements)

References 33 publications

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“…In cyclic loading like laser surface melting, according to the theory the isotropic hardening model has increased the stress magnitudes due the expansion of the yield surface. In case of kinematic model, the stress has been reduced as the Bauschinger effect accounted due to the shift of the yield surface [34].…”

Section: Prediction Of Crack Formationmentioning

confidence: 99%

Thermomechanical modelling of laser surface glazing for H13 tool steel

et al. 2018

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A two-dimensional thermomechanical finite element (FE) model of laser surface glazing (LSG) has been developed for H13 tool steel. The direct coupling technique of ANSYS 17.2 (APDL) has been utilised to solve the transient thermomechanical process. A H13 tool steel cylindrical cross-section has been modelled for laser power 200 W and 300 W at constant 0.2 mm beam width and 0.15 ms residence time. The model can predict temperature distribution, stress-strain increments in elastic and plastic region with time and space. The crack formation tendency also can be assumed by analysing the von Mises stress in the heat-concentrated zone. Isotropic and kinematic hardening models have been applied separately to predict the after-yield phenomena. At 200 W laser power, the peak surface temperature achieved is 1520 K which is below the melting point (1727 K) of H13 tool steel. For laser power 300 W, the peak surface temperature is 2523 K. Tensile residual stresses on surface have been found after cooling, which are in agreement with literature. Isotropic model shows higher residual stress that increases with laser power. Conversely, kinematic model gives lower residual stress which decreases with laser power. Therefore, both plasticity models could work in LSG for H13 tool steel.

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Section: Prediction Of Crack Formationmentioning

confidence: 99%

Thermomechanical modelling of laser surface glazing for H13 tool steel

et al. 2018

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“…As shown in Figure 1, the existing multi-way joints mostly use welding customization, and the manufacturing process is complex, especially when it comes to the demand for diameter reduction, there will be large opening diameters, discontinuous geometric structures, and intersecting main pipes and branch pipes. The stress distribution at the line is complex and the design is difficult [2]. Therefore, the design of welded multi-way joints has high professional requirements for technicians, and it is difficult to ensure dimensional accuracy during processing.…”

Section: Introductionmentioning

confidence: 99%

Structural analysis of multi-way block for large-diameter pipeline connector based on ANSYS

Han¹,

Wu²

2023

J. Phys.: Conf. Ser.

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This paper introduces a multi-way block for large-diameter pipeline connectors designed based on Hubbed slip-on-welding steel pipe flanges, which solves the problems of complicated processing technology, poor mechanical properties, and short service life of existing welded multi-way pipe joints. The structural analysis and comparison of multi-way blocks and multi-way pipe joints under different working conditions are carried out. This paper adopts certain assumptions to simplify the model, analyzes the multi-way block and multi-way pipe joint in theory, and takes the PN16-150 multi-way block as an example to refine and verify the theoretical analysis results. In this paper, Pro-E is used to establish a three-dimensional model, and ANSYS workbench is used for structural static simulation. The simulation results show that the multi-way block has better mechanical properties than the multi-way pipe joint under the same working conditions, and the multi-way block after reducing the diameter has better mechanical properties than the equal-diameter multi-way block.

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“…Ahmad et al [24] reduced the interlaminar temperature to the acceptable limit of Al 2219 by establishing an interlaminar cooling process and used experimental measurements of temperature and residual stress to validate the numerical model. Satish et al [25] found that significant differences in the threedimensional temperature distribution and residual stress state in AISI304L stub T-joints with different tube sizes along different cross sections. Carrizalez-Vazquez et al [26] used laser welding of butt joints of DP600 steel plates and reduced the deformation and residual stresses in the specimens by adjusting the welding sequence.…”

Section: Introductionmentioning

confidence: 99%

Influence of Interlayer Temperature and Welding Sequence on the Temperature Distribution and Welding Residual Stress of the Saddle-Shaped Joint of Weldolet-Header Butt Welding

Mai

Zhang

et al. 2021

Materials

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In this paper, based on Simufact Welding finite element analysis software, a numerical simulation of the temperature and residual stress distribution of the weldolet-header multi-layer multi-pass welding process is carried out, and the simulation results are verified through experiments. The experimental results are in good agreement with the numerical simulation results, which proves the validity of the numerical simulation results. Through the results of the numerical simulation, the influence of the welding sequence and interlayer temperature on the temperature and residual stress distribution at different locations of the saddle-shaped weld was studied. The results show that the temperature and residual stress distribution on the header and weldolet are asymmetric, and the high-stress area of the saddle-shaped welded joint always appears at the saddle shoulder or saddle belly position. When the interlayer temperature is 300 °C, the peak residual stress reaches a minimum of 428.35 MPa. Adjusting the welding sequence can change the distribution trend of residual stress. There is no high-stress area on the first welding side of the two-stage welding path-2. The peak values of residual stresses for continuous welding path-1 and two-stage welding path-2 are 428.35 MPa and 434.01 MPa, respectively, which are very close to each other.

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Weld characteristics of non-axisymmetrical butt welded branch pipe T-joints using finite element simulation and experimental validation

Cited by 10 publications

References 33 publications

Thermomechanical modelling of laser surface glazing for H13 tool steel

Thermomechanical modelling of laser surface glazing for H13 tool steel

Structural analysis of multi-way block for large-diameter pipeline connector based on ANSYS

Influence of Interlayer Temperature and Welding Sequence on the Temperature Distribution and Welding Residual Stress of the Saddle-Shaped Joint of Weldolet-Header Butt Welding

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