Abstract
Welding is widely used for construction of many structures. Residual stress is generated because of locally given heat. Tensile residual stress on the surface degrades fatigue strength. In this paper, a new method for reduction of residual stress using random vibration during welding is proposed. As random vibration, filtered white noise is used. Effectiveness of the proposed method is examined experimentally. It is found that tensile residual stress near the bead is significantly reduced when random vibration is used.
