Author : Nusrath Fathima and Durgunti Venkatarramaniah

Pressure vessels are being commonly used in aerospace and ground applications. Fusion welding is an efficient joining process for manufacturing metallic pressure vessels. As a result of thermally induced plastic deformation during the welding process, the internal stresses namely, the welding residual stresses are developed in the welded components and structures. Residual stresses can have a detrimental effect on the integrity of a structure. Thermo-mechanical finite element analysis has been performed to assess the residual stresses developed in the carbon steel ASTM A288 carbon steel pressure vessel during welding and elasto-plastic analysis to examine the effect of residual stresses on failure pressure of the pressure vessel. And also Fracture analysis has been carried out in butt-welded joint of ASTM A288 steel plates contain transverse through thickness crack at weld considering the residual stresses.

Keywords: Residual stresses, Elasto-plastic analysis, Pressure vessel.

Article published in International Journal of Current Engineering and Technology, Vol.6, No.5 (Oct-2016)