Numerical and parametric modeling and analysis of weld-induced residual stresses

Abstract

A three-dimensional thermo-elasto-plastic finite element analysis is used to determine the residual stress distribution and the distortion field in butt and fillet plates. The employed finite element model is first verified against existing experimental results of thermal distortion and then is used for analyzing 12 case studies accounting for various plate thicknesses and welding sequences. Weld induced residual stress distributions have been estimated and discussed. The effects of thickness, welding sequences and finite element size have been investigated. A two-dimensional parametric relationship of residual stresses has been developed.