高張力鋼溶接継手の疲労強度とティグ処理によるその改善 : き裂停留現象に基づく検討

概要

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This paper is concerned with the influence of notch root radius at the weld toe and TIG treatment on fatigue properties of welded high strength steel. In general, it has been considered that small notch radii at the weld toes are responsible for low fatigue strengths of welded joints. However, fatigue limit of a welded joint usually does not depend on the notch root radius of the weld toe becauce of the existence of non-propagating crack. In most cases, fatigue limit of the welded joint is determined from the notch root radius at the branch point which is a material constant. The beneficial effect of TIG treatment on fatigue properties differs according as the value of mean stress. This result is explained from the characteristic fatigue behavior of notched specimens.
社団法人日本機械学会の論文
1985-02-25