METHOD FOR PREVENTING FATIGUE DAMAGE IN WELDED STRUCTURES TOOL FOR FORMING IMPACT AREA AND WELDED STRUCTURE

摘要

fatigue damage to a method of inhibiting welded structure fatigue damage to the welds of welded structures, a fatigue damage to a method of inhibiting the cut to suppress the occurrence, of the welded portion, the base material (base material) surface adjacent to the weld bead of a substantially straight shape, in a direction crossing the weld bead at a right angle bent in an arc shape, and In addition, by using a blow common forming surface biases the end face toward the center of curvature of one of the welding along the bead parallel to the two cross-section from each other (end face) and tools for blow common form having a front end (tip), hammer peening or ultrasonic shock forming a blow common by pinning, and substantially straight and curved lines, the base material surface close to the weld bead shape, the whole shape is a circular or a tool for striking common form having an impact traces forming surface of the planar shape formed into an oval shape at the distal end Use the form a striking common by hammer peening or ultrasonic shock peening and Zidane weld bead by a tool for striking common form ( ; weld toe) suppresses fatigue damage of the weld by introducing compressive residual stress in the vicinity The. ;