Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Fatigue Strength Estimation of the Fillet Weldments with Different Beveling Angle and Porosity

베벨각도와 미세기공에 따른 필렛 용접부의 피로강도평가에 관한 연구

  • 홍춘희 (부산대학교 기계설계공학과) ;
  • 오세종 (기계부품소재기술지원센터) ;
  • 이원석 (연암공업대학 기계설계과) ;
  • 이현우 (부산대학교 기계공학부)
  • Published : 2006.11.01
Download PDF
⟨ Previous Next ⟩

Abstract

The fatigue test of the fillet weldments was executed with different beveling angles and porosities. The beveling angles of $0^{\circ}$, $45^{\circ}$ and $55^{\circ}$ were compared with fatigue lives. After the fillet weldment failure, the porosities which found at the fractured surface were observed to account the effect on fatigue life. Finite element analysis was performed to correlate the fatigue strength and the sizes and the locations of porosities. The stress-strain field was severely affected by the length of notch and the sizes and locations of porosities. Based on the quantitative analysis of porosity effect, the total volume of porosities was a key factor for fatigue strength of the fillet weldment.

Keywords

References

  1. Maddox S. J., 1991, 'Fatigue Strength of Welded Structures,' Abington Publishing, Second Edition
  2. Kim, J. H., Goo, B. C., 2004, 'A Study on the Fatigue Characteristics of SM490A Material due to the Welding Type,' Proceedings of the KSME 2004 Fall Annual Meeting, pp. 274-278
  3. Stephens R. I., Lee, H. Y., 1984, 'Comparison of Short and Long Fatigue Crack Threshold Behavior of Wrought and Cast Mild Steel,' Proc. of Fatigue 84
  4. Yoon, J. W., 2000, 'Study on the Porosity Source of Aluminum Alloy Welds,' Special Lecture and the Science Announcement Contest of the KWS, Vol. 2, pp, 208-210
  5. Lawrence F. V. et aI., 1975, 'Effect of Porosity on the Fatigue Properties of 5083 AL Alloys Weld Metals,' WRC Balletin 206
  6. Kim, Y. I., Kang, J. G., Heo, J. H., 2004, 'Application of 1mm Fictitious Notch Radius Approach to the Fatigue Strength Assessment of Weldment Joint,' Special Lecture and the Science Announcement Contest of the KWS, Vol. 43, pp. ？275-277
  7. Hobbacher A. F., 2003, 'Effective Notch Stress Method in Comparison with Other Methods in Fatigue Design of Welded Structures,' Paton Welding Journal c/c of Avtomaticheskala Svarka ？2003, Part 10/11, pp. 117-121
  8. Hutchings F. R. and Paul M. Unterweiser, 1981, 'Failure Analysis,' American Society for Metals, the British Engine Technical Reports. Metals Park, Ohio