付加溶接形状の制御と止端グラインダー仕上げの併用による面外ガセット溶接継手の疲労強度向上効果

抄録

This study investigated the effect of controlled-additional weld using a conventional welding consumable and grinding of weld toe on fatigue strength. The toe radius trended to be larger by the additional weld and grinding of weld toe, and the fatigue strength of this specimen was increased than that of only additional weld. However, when the aiming position of additional weld is too far from fillet weld toe, the dent between fillet weld and additional weld occurs and fatigue crack tended to occur at the boundary between those. The stress concentration factor at the weld toe and the boundary were calculated by FE analysis, it was confirmed that both the fatigue strength and location where cracks occure are explained by the size of the stress concentration factor.