Evaluation of the load carrying capacity of T-welded joints with lack of fusion defects in ductile fracture conditions in bending

摘要

The proposed method of determining the maximum bending moment of two-sided T-joints with lack of fusion defects in the ductile fracture conditions takes into account the effect of the geometrical parameters of the fillet joints, the volume of the deposited metal, the depth of penetration of the welded components, the method of defining the external bending momentum, and is based on the determination of the position of the regions of plastic yielding in bending. A method was proposed for calculating the ductile strength of the T-joints in bending. The method takes into account the length of the lack of fusion defects, the geometry of fillet joints, the method of defining the external bending moment, and can be used for calculating the geometrical parameters of welded joints. The increase of the depth of penetration increases the load carrying capacity of the investigated joints. The change of the angle of inclination of the front edges of the fillet joints whilst retaining the deposited metal volume also influences the limiting load and, consequently, it is possible to optimize the weld geometry and increase the load-carrying capacity of the welded joints.