Thermal fatigue behavior of Dissimilar steel weld joints

Abstract

Thermal fatigue is a phenomenon wherein structural harm takes place when a material is subjected to cyclic thermal modifications that can result in initiation and increase of cracks and sooner or later result in fracture after exposure to enough quantity of cycling. The thermal strains and related thermal stresses are generated in the material whilst exposed to a temperature gradient, over any number of repeating cycles. This procedure is called thermal fatigue. Residual stresses are developed after welding has taken place in this paper I have developed a model of dissimilar weld joint in abaqus and found the distribution of residual stress for various kinds of weld bead geometry In this report, I have also taken the effect of weld bead geometry for calculation of residual stresses developed due to thermal cycles.