Evaluation of the Stress Concentration Factor in Butt Welded Joints: A Comparative Study

Surface cracks in butt-welded joints usually occur places with increased stress concentrations. The concentration factor (SCF) can be calculated using an empirical equation, five geometric parameters of a joint (thickness the base material, toe radius, weld angle, width, and reinforcement height). However, industrial environment, it is impractical sometimes even impossible to measure all sufficient accuracy. In this study, eight experiments on were performed. All samples scanned 3D scanner, sizes welded measured computer software. A modified expression proposed by Ushirokawa Nakayama was used calculate SCF; adjusted such way that SCF knowing only radius. addition, four new expressions for calculation radius relation angle; then compared analyzed. Additionally, values concentrations obtained finite element method (FEM). SCFs methods further discussed. Our data suggested accurate straightforward approach calculating