Fusion Welding Process

CHEPTER-2 LITERATURE REVIEW

Dean Dang et al. Fusion welding process is widely used in shipbuilding and automobile industries to join thin plate panel structure. High tensile strength steel thin plate used instead of low carbon steel to reduce the weight. In thin plate buckling distortion is occurs and it loss the structural integrity and dimensional accuracy. In this study, welding distortion in a large thin plate panel structure was predicted by means of elastic FEM based on inherent strain theory and interface element formulation. In this concept of inherent strain and inherent deformation mentioned. In this elastic strain, plastic strain, thermal strain, creep strain.

Simulation cases study four simulation case

A).Double- sided welding

And they given temperature variation, plastic strain, hoop stress, radial deformation and axial deformation are defined in this research paper.

Robert Ngendang Lidam et al. In this multi pass welding adviser is evaluated to analyzing the angular distortion in the gas metal arc welding process to join a combination of butt joint to join thickness 9 mm. they are make simulation in sysweld 2010. And it gives enthalpy based formulation to solve the problem in liquid and solid domain.

They also make experimental investigation conduct on combine of t joint and find the distortion in the direction flange.

P.Michaleris et al. In this paper welding distortion in thin section they have use of the thermal tensioning technique. In thermal tensioning eliminate buckling give high heat input welding condition. And simulation of pre tensioning condition it gives in T joint at two sides resistive heating and below welded portion giving a impingement water cooling. After it conclude that thermal tensioning technique can significantly reduce the longitudinal residual stress which is eliminate welding induced buckling. It also illustrate that the finite element method can be used to determine the optimum thermal tensioning condition of specified weld joint and heat

In this paper they make finite element model of the thermal and mechanical welding simulation and develop the welding numerical models. They consider the process parameter is welding speed, number and sequence of passes. Also they have used the some assumption like A) all the material properties are describe till to the liquid phase of the metal. B) convection and radiation are consider.

They take temperature dependent material property for both INCONEL365 and AISI 316 material. In material property consider specific heat, thermal conductivity, enthalpy, density at up to liquid phase temperature of the metal. Fig 2.3 Filling material elements with pass numbering In above figure different material element describe. This element are simulate in ANSYS using birth technique. First of all element are killed after that load step are given and then it birth the every element step by step. They find out the graph of greatest temperature in element with respect to