Fatigue Characteristics of Non Load-Carrying Fillet Welded Joints According to Post-Processing

용접후처리에 따른 하중비전달형 필렛용접부의 피로특성

  • Received : 2010.11.04
  • Accepted : 2010.12.14
  • Published : 2010.12.31

Abstract

A series of fatigue tests have been performed on the non-load carrying fillet welded joints in order to quantitatively assess the fatigue characteristics due to the grindings and TIG(Tungsten Inert Gas) welding treatments. From the results of fatigue tests, it has been shown that the fatigue strengths at $2{\times}106$ load cycles were improved in the case of the grinding sand TIG welding treatments, and we could know that it is satisfying fatigue strength prescribed in fatigue design standard in general. Besides, from the results of fracture mechanics approaches, the geometric shape correction factors were the most dominant factors in the initial fatigue crack growth, but as the fatigue crack develops, the finite plate correction factor were became the most dominant factor, and the fatigue life on non-load carrying fillet welded joints could be relatively exactly estimated by using the relations between fatigue crack growth rate and stress intensity factor obtained from finite element analysis and existing proposed formulae.

References

  1. 김동준, 홍성욱, 경갑수, 최동호, "순수휨을 받는 하중비전달형 필렛용접부의 피로특성에 관한 연구", 한국강구조학회 2000년도 학술발표대회 논문집, pp. 75-84, 2000.
  2. 日本土木學會編, "鋼橋における劣化現象と損傷の評價", (株)丸善, pp10-12, 1996.
  3. 衫本一朗, "溶接鋼鐵道橋の疲勞强度と延命化に關する硏究", 鐵道總硏報告, 鐵道總合技術論文集, 特別 第23號, pp. 1-8, pp. 57-63. 1998.
  4. 飯田國廣 外, "鋼隅肉溶接繼手の曲げ疲勞强度に及ぼす隅肉形狀等の影響", 日本造船學會論文集, 第143號, 1978.
  5. 寺崎俊夫, 秋山哲也, 橫島直彦, 磯谷壽甫, 堅田寬治, "余盛形狀と應力集中率 : 溶接繼手部の應力集中率.應力擴大係數について(第1報)", 溶接學會論文集, 第51卷, 第9號, pp. 790-796, 1982.
  6. 小野塚正一, 後川理, 熊倉靖, 辻勇, "溶接止端部形狀が疲勞强度に及ぼす影響(第1報) : ビ一ド止端の應力集中と 疲勞强度", 日本造船學會論文集, 第170號, pp. 693-703, 1991.
  7. 辻勇, "非荷重傳達型すみ肉溶接繼手の止端部の應力集中係數の推定式", 西部造船會會報, 第80卷, 1990.
  8. 日本鋼構造協會編, "鋼構造物の疲勞設計指針.同解說", 技報堂出版, pp. 5-12, pp. 240-260, 1993.
  9. 後川理, 中山英治, "溶接繼手部の應力集中係數", 石川島播磨技報, 第23卷, 第4號, pp. 351-355, 1983.