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This paper presents a numerical and experimental study of residual stresses induced by the buried arc welding process in a butt-welded plate sample. Within the framework of numerical investigations, a thermo-mechanical finite element analysis is performed by applying the element birth and death technique in the thermal analysis, while the mechanical analysis is performed simultaneously in one step to reduce simulation time. To validate the numerical model, a series of experiments using a fully automated welding process are conducted. The temperature and residual stress measurements are performed by using thermocouples and hole-drilling stress relaxation method. Furthermore, the heat input efficiency for the buried arc welding process is determined by using a parametric analysis.
buried arc welding, butt-welded plates, residual stress, modified MAG welding, thermocouples, hole-drilling method
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