Numerical simulation of welding distortion in large structures

3D Finite Element Simulation of T-Joint Fillet Weld: Effect of Various Welding Sequences on the Residual Stresses and Distortions

“…Also, considering limited literatures concerning welding simulation of T-joint fillet welds in 3D Lee, 2009 andDeng et al, 2007), the results obtained would be very valuable and useful to welding designers and practitioners, because the results have been describing the predicted or anticipated residual stresses and distortions with respect to the welding sequences, varied from simple to multiple crossing welding. In addition, the assessment of welding performance which can be taken in an efficient and fast manner allows the designers to integrate it in their subsequent design plans.…”

Finite Element Simulation of Welding Distortion in Dissimilar Joint by Inherent Deformation Method

“…The application of local heat creates different types of elastic, plastic, thermal, and creep strains in the plate as well as in the welded zone. The elastic part of these strains is reversible and is removed after cooling; however, other parts of the strain remain and their sum is defined as the inherent strain [11], which is expressed by Equation 1:…”

“…Therefore, the stiffness matrix of these elements should be multiplied by a large reducing factor to have all irrelevant elements deactivated, which is done by the element birth and death technique in ANSYS. In this technique, all elements are deactivated at the beginning of the analysis, and the relevant element is activated when thermal source reaches the desired point [11]. Then, boundary conditions are applied.…”

Prediction of the Temperature Distribution and Microstructure in the HAZ of SA508Gr4 Reactor Pressure Vessel Steel

“…Now accurate predication can be realized for welding deformation, welding stress and welded joint microstructures by using finite element method (FEM), it also provides reference to prevent cracking or buckling, which is caused by local production internal structure damage. [4][5][6] It is necessary to study the effects of welding parameters on the quality of welding of SA508Gr4 steel in order to achieve the optimum weldability.…”