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Numerical Simulation and Experimental Investigation of Temperature and Residual Stress Distributions in a Circular Patch Welded Structure

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Bestprojekt d.o.o., Bureau of Energetic and Mechanical Engineering Ltd., Petrovaradinska 7, 10000 Zagreb, Croatia
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LTEF Laboratory for Thermodynamics and Energy Efficiency, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split, Ruđera Boškovića 32, 21000 Split, Croatia
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Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ivana Lučića 5, 10000 Zagreb, Croatia
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Author to whom correspondence should be addressed.
Energies 2020, 13(20), 5423; https://doi.org/10.3390/en13205423
Received: 28 September 2020 / Revised: 14 October 2020 / Accepted: 15 October 2020 / Published: 17 October 2020
(This article belongs to the Special Issue Numerical Modeling and Machine Learning Techniques)
In this study, we performed a numerical simulation and experimental measurements on a steel circular patch welded structure to investigate the temperature and residual stress field distributions caused by the application of buried-arc welding technology. The temperature histories during the welding and subsequent cooling process were recorded for two locations, with the thermocouples mounted inside the plate close to the weld bead. On the upper surface of the welded model, the temperature-time changes during the cooling process were monitored using an infrared camera. The numerically calculated temperature values correlated well with the experimentally measured ones, while the maximum deviation of the measured and calculated temperatures was within 9%. Based on the numerical result analysis regarding circumferential and radial stresses after the completion of the welding process, it is concluded that both stresses are primarily tensile within the circular disk. Outside the disk, the circumferential stresses turn from tensile to compressive, while on the other hand the radial stresses disappear towards the ends of the plate. View Full-Text
Keywords: MAG welding; buried-arc welding; infrared camera; thermocouples; welding residual stresses; patch weld; repair welding MAG welding; buried-arc welding; infrared camera; thermocouples; welding residual stresses; patch weld; repair welding
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Perić, M.; Nižetić, S.; Tonković, Z.; Garašić, I.; Horvat, I.; Boras, I. Numerical Simulation and Experimental Investigation of Temperature and Residual Stress Distributions in a Circular Patch Welded Structure. Energies 2020, 13, 5423.

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