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Characteristics of Fatigue Failure according to Thickness of Material and Number of Passes in Cruciform Fillet Weld Zone

십자형 필릿 용접부에서 재료 두께 및 용접 층수에 따른 피로파괴 특성

  • Lee, Yong-Bok (Dept. of Mechanical and System Design Engineering, Hongik University)
  • 이용복 (홍익대학교 기계.시스템디자인공학과)
  • Received : 2010.04.21
  • Accepted : 2010.11.19
  • Published : 2010.12.31

Abstract

Most of joining processes for machine and steel structure are performed by butt and fillet welding. The mechanical properties and fatigue strength of their welding zone can be effected largely by the differential of generated heat and changes of grain size according to thickness of material and number of passes in welding process. In this study, it was investigated about characteristics of fatigue failure according to thickness of material and number of passes in cruciform fillet weld zone as the basic study for safe and economic design of welding structures. Fracture modes in cruciform fillet weld zone are classified into toe failure and root failure according to non-penetrated depth. It can be accomplished economic design of welding structures considering fatigue strength when the penetrated depth in fillet weld zone is controled properly.

Keywords

References

  1. ANSI/AWS: Structural welding code- Steel, DI. 1-86 (1986)
  2. S. D. Pathak, V. M. Radhakrishnam and B. Guha: Fatigue crack growth in cruciform welded joints, Joining and Materials, December, 1988, 12-16
  3. G. M. Boyd: Brittle behavior of engineering structures, John Wiley & Sons Inc., New York, 1957
  4. H. Ikawa, H. Oshige, O. Noi, H. Date and K. Uchkawa: Relation between welding conditions and grain size in weld-heat affected zone, Transactions of the Japan Welding Society, 9-1(1978), 47-51
  5. T. Sato: The effect of microstructure on the Table 5.3 Welding conditions for the fillet joints fatigue and impact properties of welded zone in high carbon steels, Research Article, Trans. ISII,. 21(1980), 260-269
  6. Byung-Duck Oh and Yong-Bok Lee: Estimation of fatigue life in butt-welded zone of SM45C steel rod, Journal of KWJS, 26-3 (2008), 45-50 (in Korean) https://doi.org/10.5781/KWJS.2008.26.3.045
  7. Yong-Bok Lee: Characteristics of fatigue behavior and fracture surfaces by rotary bending test in SM45C welding zone, Journal of KSMTE, 19-1( 2010), 26-32(in Korean)
  8. V. Balasubramanian and B. Guha: Influence of weld size fatigue crack growth characteristics of flux cored arc welded cruciform joints, Materials Science and Engineering A265, 1999, 7-17
  9. V. Balasubramanian and B. Guha: Influence of flux cored arc welded cruciform joint dimensions on fatigue life of ASTM 517 'F' grade steels, Int. J. Pres. Ves. & Pip., 75 (1998), 765-772 https://doi.org/10.1016/S0308-0161(98)00080-5
  10. J. M. Ferreira and C. M. Branco: Influence of weld and plate geometry on the fatigue strength of cruciform joints, Theor. Appl. Frac. Mech., (1988), 23-32 https://doi.org/10.1016/0167-8442(88)90044-4
  11. J. M. Ferreira and C. M. Branco: Influence of fillet weld joint geometry on the fatigue crack growth, Theor. Appl. Frac. Mech., 15 (1991), 131-142 https://doi.org/10.1016/0167-8442(91)90012-9

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