振動を利用した溶接残留応力の低減法(種々の振動数による検討)

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  • REDUCTION OF RESIDUAL STRESS OF WELDED JOINT USING VIBRATION (EXAMINATION USING VARIOUS FREQUENCIES)
  • シンドウ オ リヨウシタ ヨウセツ ザンリュウ オウリョク ノ テイゲンホウ シュシュ ノ シンドウスウ ニ ヨル ケントウ

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Welding is widely used for construction of many structures. It is well known that residual stressis generated in welding. Tensile residual stress degrades fatigue strength. Then, some methods forreduction of residual stress are developed and practically used. In this paper, a new method forreduction of residual stress using vibration during welding is proposed. Authors tried to use vibrationwith various frequencies. First, vibration with relatively low frequency is used. Second, ultrasonicvibration is used. Finally, random vibration is used. Tensile residual stress is reduced in all cases.Then, it is found that vibration with various frequencies is effective to reduction of residual stress.

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