Comparison of weld characteristics between longitudinal seam and circumferential butt weld joints of cylindrical components

Velaga, Satish K.; Rajput, Gaurav; Murugan, S.; Ravisankar, A.; Venugopal, S.

doi:10.1016/j.jmapro.2014.11.002

Cited by 25 publications

(5 citation statements)

References 22 publications

(47 reference statements)

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“…Based on the analysis conducted, Figures 3, 4, 5, 6, and 7 show the results of deformation and the principal stresses developed in the butt welds under loading, thermal and fluid flow conditions. The distribution of stresses is maximum around the butt welds whereas the deformation is least around this region; this is in line with results obtained from previous studies [11,12]. Also, minimal stress levels were observed around the body of vessel, thus, confirming the operational safety of the system for the designed condition.…”

Section: Resultssupporting

confidence: 91%

Investigation of the Effects of Hydraulic Transient due to Instantaneous Valve Closure in a Petroleum Pipeline

Muhammad¹,

Nasir²,

Ayo³

et al. 2021

NIPES - Journal of Energy Technology and Environment

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This article focused on the analysis of butt welded joints of a carbon steel pressure vessels reactor under certain conditions to determine a safe operating condition of the system. ANSYS was used to simulate and evaluate the butt welded joints. The welds were analyzed under load, thermal and fluid flow conditions so as to determine the optimum condition under which the welds and system may deform or become compromised. Results showed that the values of induced stress and strain obtained under a thermal load of 160MPa were 610.10MPa and 0.0069, respectively. In addition, the maximum principal stress and strain-induced on the butt welded joints under 160 MPa load condition were 1.096x10 5 MPa and 0.445, respectively. It was observed that the deformation on the system due to residual stresses developed around the heat affected zone of the butt weld would not cause the system to fail.

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Section: Resultssupporting

confidence: 91%

Investigation of the Effects of Hydraulic Transient due to Instantaneous Valve Closure in a Petroleum Pipeline

Muhammad¹,

Nasir²,

Ayo³

et al. 2021

NIPES - Journal of Energy Technology and Environment

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“…In the 1970s, the thermo-elastic-plastic finite element method (TEP-FEM) was first proposed to simulate the welding process and calculate welding residual stresses and distortions by Ueda et al 2) . Later, the effectiveness and accuracy of the TEP-FEM were also proved by other researchers [3][4][5][6] . Venkatkumar et al 3) presented the sequentially coupled thermo-mechanical FEM simulation to predict temperature distribution, residual stress, and distortion in a welded 304 stainless steel plate.…”

Section: Introductionmentioning

confidence: 86%

“…In structural analysis, the total strain produced by the welding process can be divided into multiple strain components, as shown in Eq. (6) ( 6 ) where , , , , and in this equation denote the thermal strain, elastic strain, plastic strain, phase transformation strain, and creep strain, respectively.…”

Section: Definition Of Inherent Strainmentioning

confidence: 99%

“…Meanwhile, a series of experiments were also conducted to validate the simulation results. Velaga et al 6) compared the weld characteristics between the longitudinal seam and circumferential butt weld joints of cylindrical components by using TEP-FEM simulation and experimental validation. Currently, the TEP-FEM is widely accepted to accurately model the welding process and capture temperature or stress-strain fields for various welded structures.…”

Section: Introductionmentioning

confidence: 99%

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Welding Distortion Prediction for Multi-Seam Welded Pipe Structures using Equivalent Thermal Strain Method

Wang

Kim

2021

Journal of Welding and Joining

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Distortion prediction of a welded structure is an important way to improve work efficiency and ensure product quality during the fabrication process. Recently, the widely used approaches for evaluating residual deformation include the thermo-elastic-plastic finite element method (TEP-FEM) and the inherent strain method (ISM). The former can accurately simulate the entire welding process with excessive computational time, whereas the latter has great potential in the fast prediction of residual distortion in complex welded components. In this study, an equivalent thermal strain method based on inherent strain theory was proposed to predict residual deformation of the multi-seam welded pipe structures. Moreover, a full 3D TEP-FEM model was also developed to estimate the distributions of inherent strain in longitudinal (L-seam) and circumferential (C-seam) welds. To validate the accuracy of the proposed ISM, the welding distortion predicted by the proposed ISM is compared with the experimental data and TEP-FEM simulation results. It is discovered that the proposed ISM can be used to accurately predict welding-induced deformation in multi-seam welded pipe structures. Furthermore, compared with TEP-FEM simulation, the significant advantage of this approach is that the computing efficiency can be increased by about 50 times.

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“…Therefore, how to effectively control the post-weld residual stress and deformation of the header-weldolet welding joint to ensure the safety and reliability of the header work is the primary problem to be solved. Previously, a number of welding scholars conducted detailed research on the residual stress and welding deformation in thick plate butt welding [12][13][14][15], pipe hoop and longitudinal welds [16][17][18], and dissimilar steel welding [19][20][21]. For example, Zhu et al [22] found that regardless of the welding sequence used, once the base layer, transition layer, and flying edge weld layer were all completed, the highest residual stress concentration was generated in the translation layer and its surrounding area.…”

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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Comparison of weld characteristics between longitudinal seam and circumferential butt weld joints of cylindrical components

Cited by 25 publications

References 22 publications

Investigation of the Effects of Hydraulic Transient due to Instantaneous Valve Closure in a Petroleum Pipeline

Investigation of the Effects of Hydraulic Transient due to Instantaneous Valve Closure in a Petroleum Pipeline

Welding Distortion Prediction for Multi-Seam Welded Pipe Structures using Equivalent Thermal Strain Method

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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