Determination of Residual Welding Stresses in Load Bearing Structures Made of Welded Hollow Sections

Abstract

This paper presents methodology for determining residual stresses originated from welding process in load bearing bridge steel structures made of square profile tubes. Simulated welding process was performed together with the selected welding sequences and due to significant thermal effect on the welding area residual stresses inside the butt weld area and around it were evaluated. The developed finite element (FE) model allows determining residual stresses of welding in any type of hollow sections butt welds.

Mechanics and Material Aspects in Serviceability Prediction of the Heat Exchangers

“…To avoid untimely damage of HE, it is very important to choose properly not only the material, but also geometrical parameters (first of all the thickness) of plates, tubes and connecting pipes of HE [8,9]. For this reason, a HE tube which has a high tensile strength, excellent process ability and good thermal conductivity is strongly demanded for thinning of the HE tube.…”