Measurement and finite element analysis of temperature distribution in arc welding process

Lee, C. K.; Candy, J.; Tan, Crystal Tze Ying

doi:10.1504/ijcat.2004.006642

Cited by 8 publications

(4 citation statements)

References 4 publications

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“…The conversion from specific heat to enthalpy yields a smoother curve. The thermo-physical properties used in this study reflect the material properties given in [31].…”

Section: Materials Propertiesmentioning

confidence: 99%

Alternative simulation techniques for distortion of thin plate due to fillet-welded stiffeners

Camilleri¹,

Mollicone²,

Gray³

2006

Modelling Simul. Mater. Sci. Eng.

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This study aims to develop and validate a wide-ranging simulation tool to predict welding distortion in stiffened plates and shells, with particular emphasis on out-of-plane deformation. The approach adopted in this study uncouples the thermal, elasto-plastic and structural effects leading to distortion. The computational models and results are supported by realistic welding tests and appropriate measurements to validate the simulated thermal fields and out-of-plane distortions. The simplest and most computationally efficient model makes use of algorithms, instead of numerical computation, to link the thermal welding strains to the elasto-plastic and structural responses of the welded assembly, via a static, single-load-step analysis. Alternative, more computationally intensive models are explored which simulate the full transient thermal and elasto-plastic structural responses in an uncoupled fashion. These provide a cross-reference for the more rudimentary but computationally efficient models. The experiments and computational strategies are applied to welded assemblies incorporating double-fillet-welded stiffeners.

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“…The conversion from specific heat to enthalpy yields a smoother curve. The thermo-physical properties used in this study reflect the material properties given in [31].…”

Section: Materials Propertiesmentioning

confidence: 99%

Alternative simulation techniques for distortion of thin plate due to fillet-welded stiffeners

Camilleri¹,

Mollicone²,

Gray³

2006

Modelling Simul. Mater. Sci. Eng.

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“…The situation was mathematically modelled for a 10 mm thick weld with a twodimensional sectional transient finite element thermal model using ANSYS software. 28 A significant number of factors were known, which allowed a reasonably accurate assessment of the welding efficiency (g) to be made using Rykalin's 29 formula, shown below.…”

Section: Discussionmentioning

confidence: 99%

Laser and laser assisted arc welding processes for DH 36 microalloyed steel ship plate

McPherson¹,

Suarez-Fernandez²,

Moon³

et al. 2005

Science and Technology of Welding and Joining

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A series of laser and laser assisted metal inert gas (MIG) welds was produced from a common plate. Each weld was mechanically tested, and the welds showed broadly similar properties, except for the autogenous CO2 laser weld metal, which had poorer toughness. This was related to a harder weld metal microstructure. Toughness and hardness were related to the lath width of the ferrite, for the welds involved. The weld metal area/volume was used as an indicator of potential distortion. In this instance, the autogenous CO2 laser weld was superior to the CO2 laser assisted MIG weld which was better than the Nd:YAG laser assisted MIG weld. Each weld was examined using carbon extraction replicas in the TEM, and also using an SEM with an EDAX attachment. A number of inclusions and precipitates were observed, identified and sized. It was concluded that the particles observed were not detrimental in this specific case. A tentative relationship was established between parent plate inclusion size distribution and weld metal inclusion size distribution

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“…In thermal analysis, radiation heat losses were ignored. Convection coefficient of 8 W/m 2 C [24][25][26][27] and constant density of 2640 kg/m 3 were considered. Because of convective heat transfer effects caused by the fluid flow, thermal conductivity at the liquids were assumed to be almost twice the value at the solidus as suggested by Andersson.…”

Section: Thermal Analysismentioning

confidence: 99%

Stress analysis of welded joints in internal stiffener rings in an aluminum cylinder

Amir

Sattari-Far

Salehi

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part L:

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Structural weight is one of the key criteria for vessels used in marine industries. The use of stiffeners and stringers strengthens the structure with the addition of a minimum weight. In cylindrical pressure vessels under hydrostatic pressure, mostly ring-type stiffeners are used. In order to join a stiffener ring to the vessel, welding is a conventional method. However, this process generates welding residual stresses and distortions, which can be added to external loads and cause structural failure. This study aims to develop a comprehensive simulation tool to predict distortions and residual stresses generated due to fillet-welded stiffener ring on an aluminum cylinder. Therefore, a hybrid numerical simulation approach has been employed. The simulation strategy has been implemented by using finite element software ANSYS enhanced with a number of subroutines. Results showed that the stiffener ring changes distortion trend in all orientation, especially in the radial direction with a reduction up to 15% in stiffener ring position. On the other hand, the radial residual stress was negligible and the hoop residual stress was tensile in the fillet weld region, with half of the base metal tensile strength magnitude, except in the start and the end of weld. Moreover, the axial residual stresses in the weld region on inner and outer surface of vessel in stiffener ring position were tensile and compressive, respectively.

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Measurement and finite element analysis of temperature distribution in arc welding process

Cited by 8 publications

References 4 publications

Alternative simulation techniques for distortion of thin plate due to fillet-welded stiffeners

Alternative simulation techniques for distortion of thin plate due to fillet-welded stiffeners

Laser and laser assisted arc welding processes for DH 36 microalloyed steel ship plate

Stress analysis of welded joints in internal stiffener rings in an aluminum cylinder

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