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Three-dimensional thermo-mechanical FEM simulations are conducted for the tube plate welding. Different welding processes are simulated base on MARC. The optimization processes is evaluated by simulation results of welding residual stress distribution. The results shows that large welding seam, two sides alternative welding and TIG arc remelt weld toe can reduce stress center in X&Y direction...
Large-diameter longitudinal welded pipe is the main form of energy transport, and used widely in the area of oil and gas transportation. In this paper, large-diameter longitudinal welded pipe forming methods are introduced, and a review on recent research results of finite element simulation technology in the production of large-diameter longitudinal welded pipe are made, in particular JCO/JCOE pipe...
Multi-step bending is the key manufacturing technology of large-diameter straight seam submerged arc weld (LSAW) pipes JCO. The aim of this search is to predict the precise final geometry of the pipe after forming because the considerable elastic recovery during unloading leading to springback affects the precision in dimension. In this study the JCO forming process for X-80 pipe with wall thickness...
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