In manufacturing of pipe walls for the construction of boiler units, Distortion results in pipe-web-pipe joints from the nonuniform expansion and constraction of the weld metal and the adjacent base metal during the heating and cooling cycle of the welding process. This thesis is concerned with a method of calculation of the stresses and the strains during longitudinal welding of the web-pipe joint produced with a submerged are welding machine.
Using the method of successive elastic solution, longitudinal stresses and strains during and after welding were calculated from the information of temperature distributions calculated by the Rosenthal's equation.
The temperature distributions during welding were measured with the thermocouples and the residual stresses with the blindhole-drilling method. The experimental results were compared with the calculated. The analytical results of one dimensional residual stresses were considerably in good agreement with the experimental.
