Developing a realistic FE analysis method for the welding of a NET single-bead-on-plate test specimen

Thermo-mechanical modelling of a single-bead-on-plate weld using the finite element method

“…The aim of this work is to predict the residual stress in the plate following welding, for later comparison with measured distributions and other NeT participants' results. Some results obtained during the model development phase were presented in [10], where the weld deposition stage alone was considered. In this paper, which supersedes [10], the full transient thermal profiles, the resultant residual stress and plastic strain distributions resulting from a set of three-dimensional FE simulations of the weld deposition stage and subsequent cooldown to steady state temperature conditions are presented.…”

Numerical and experimental investigation into effect of temperature field on sensitization of Alloy 690 butt welds fabricated by gas tungsten arc welding and laser beam welding

“…However, in our report, the range of the sensitization zone in the HAZ is our main concern. According to Nasstrom et al (1991) and Shan et al (2007) proposed, a Péclet number >10 is suited to a 2D model, and <10, to a 3D model. In our models, the Péclet number is assumed to have a value of 81 for the GTAW process and 225 for the LBW process.…”

“…The model took explicit account of the respective effects of the electric, magnetic, heat and material flow fields on the formation of the weld pool and the interface between the liquid state and solid state in the molten metal. Shan et al (2007) examined the suitability of various heat source models and boundary conditions for the finite element modeling of NET single-bead-on-plate specimens. The results indicated that the use of an ellipsoidal power density distribution improved the agreement between the numerical solutions and the theoretical or analytical results, respectively.…”

Predicting Effect of Temperature Field on Sensitization of Alloy 690 Weldments

“…An excellent review of the thermal modeling of laser welding and related processes is provided by Mackwood. 11) Although various numerical modeling techniques are available, FEM tends to be the most widely used due to its convenience. [12][13][14] Although computer simulations provide the means to obtain detailed insights into the basic phenomena associated with a variety of welding processes, the accuracy of the simulation results is critically dependent on the values assigned to the physical properties of the workpiece, e.g. the thermal conductivity, the density, the specific heat, and so on.…”