FE-calculated stresses in a multi-pass butt-welded pipe—A simplified approach

Josefson, B. L.; Karlsson, Carl-Joar

doi:10.1016/0308-0161(89)90017-3

Cited by 20 publications

(8 citation statements)

References 8 publications

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“…Both cases resulted in same distribution of residual stresses. This supports the argument stated in Josefson and Karlsson’s study 19 that, in case of few weld passes, the last weld pass governs the welding residual stress when the line energy supplied in the last weld pass is high.…”

Section: Application To Other Welded Jointssupporting

confidence: 89%

“…Siva Prasad and Sankaranarayanan 17 reduced the computational time using adaptive mesh generation, and Lindgren et al 18 used automatic meshing technique for estimation of residual stresses. Josefson and Karlsson 19 obtained qualitatively good results without considering the phase transformation effects for multipass butt-welded pipe joint in two dimensions with three load steps for representation of temperature history during welding. Zhu and Chao 20 suggested that only temperature-dependent yield stress is enough to get the residual stresses with reasonable accuracy.…”

Section: Introductionmentioning

confidence: 99%

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Development of efficient three-dimensional welding simulation approach for residual stress estimation in different welded joints

Bhatti

Barsoum

2012

The Journal of Strain Analysis for Engineering Design

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Based on the available welding simulation approaches found in the literature, an alternative and simplified welding simulation approach is developed, called rapid dumping. It is a sequential thermomechanical approach, which makes use of the moving heat source in thermal analysis and the block-dumping approach in mechanical analysis for prediction of welding residual stresses in three dimensions. It is first developed for longitudinal stiffener joint and then validated by applying on a butt-welded, T-fillet, and multipass tube-flange joints. The temperature-dependent material properties were obtained using JMat Pro software, a java-based material property simulation software. The material properties were validated with experimentally determined material properties found in the literature. The predicted residual stresses were validated by X-ray diffraction measurements on the longitudinal stiffener fillet-welded joint. Using the rapid-dumping approach, the residual stresses obtained at the weld toe were in qualitatively good agreement with the measured residual stresses. The rapid-dumping approach showed to capture the effects of moving heat source and weld start/stop location. In addition, it has reduced the computational time significantly with a preserved accuracy of the estimated welding residual stresses.

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Section: Application To Other Welded Jointssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Development of efficient three-dimensional welding simulation approach for residual stress estimation in different welded joints

Bhatti

Barsoum

2012

The Journal of Strain Analysis for Engineering Design

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“…Unfortunately, the calculation of residual stress fields is a very intriguing problem due to the complex interaction among thermo-mechanical material properties, clamping conditions, geometry of the workpieces, thermal loads and phase transformations. In order to simplify this problem, many works in the literature about welding simulations do not take into account the effect of phase transformations [9][10][11][12]. This simplification was supported by the fact that Young's modulus and Poisson's coefficient are very low at high temperatures (above 600 • C).…”

Section: Introductionmentioning

confidence: 99%

Influence of phase transformations on the asymptotic residual stress distribution arising near a sharp V-notch tip

Ferro

2012

Modelling Simul. Mater. Sci. Eng.

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In this work, the residual stress distribution induced by the solidification and cooling of a fusion zone in the vicinity of a sharp V-notch tip is investigated. The intensity of the residual asymptotic stress fields, quantified by the notch stress intensity factors, was studied for two different V-notch specimen geometries under generalized plane-strain conditions. In order to analyze the influence of phase transformations on the obtained results, simulations with and without the effects of phase transformation were carried out on ASTM SA 516 steel plates. Thanks to the possibilities of numerical modelling, additional analyses were performed without taking into account the transformation plasticity phenomenon. It was found that phase transformation effects (both volume change and transformation plasticity) have a great influence on the intensity and sign of the asymptotic stress fields at the sharp V-notch tips. This result is believed to be very important for the correct numerical determination (and future applications) of notch stress intensity factors resulting from asymptotic residual stress distributions induced by transient thermal loads. The analyses were performed with the finite element code SYSWELD.

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“…Precise prediction of residual stress fields (magnitude and trends) is not an easy task due to complexity involved including short-term localised heating and rapid cooling, temperature-dependent material behaviour, moving heat source, and metallurgical transformations. Accordingly, FEbased numerical simulations gained a considerable popularity in predicting the adverse consequences of welding phenomenon in the last three decades [3][4][5]. A significant contribution for the analysis of residual stress fields in circumferentially welded structures focusing on pipe and cylinders is available in literature [6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Residual Stress Fields due to Varying Tack Welds Orientation in Circumferentially Welded Thin-Walled Cylinders

Qureshi

Malik

Dar

2009

Advances in Mechanical Engineering

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The local, nonuniform heating and subsequent cooling during the welding processes causes complex thermal stress/strain fields to develop that finally leads to residual stresses, distortions, and their adverse consequences. Residual stresses are of prime concern to the industries producing weld-integrated structures around the globe because of their obvious potential to cause dimensional instability in welded structures, contribute to premature fracture/failure, along with the significant reduction in fatigue strength and in-service performance of the welded structures. Arc welding with single or multiple weld runs is an appropriate and cost effective joining method to produce high-strength structures in these industries. A multifield interaction in arc welding process makes it a complex manufacturing process. A number of geometric and process parameters are contributing to significant stress levels in arc-welded structures. In the present analysis, parametric studies are conducted for the effects of a critical geometric parameter, that is, tack weld on the corresponding residual stress fields in circumferentially welded thin-walled cylinders. Tack welds offer a considerable resistance to the shrinkage and the orientation, and size of tacks can alter altogether the stress patterns within the weldments. Hence, a critical analysis for the effects of tack weld orientation is desirable.

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FE-calculated stresses in a multi-pass butt-welded pipe—A simplified approach

Cited by 20 publications

References 8 publications

Development of efficient three-dimensional welding simulation approach for residual stress estimation in different welded joints

Development of efficient three-dimensional welding simulation approach for residual stress estimation in different welded joints

Influence of phase transformations on the asymptotic residual stress distribution arising near a sharp V-notch tip

Residual Stress Fields due to Varying Tack Welds Orientation in Circumferentially Welded Thin-Walled Cylinders

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