Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
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A study on the fatigue life and the change of the strain during the fatigue fracture on the fillet welded specimens of SM490A

SM490A 재질 필렛 용접시편의 피로수명과 용접부 피로파단시 스트레인 변화 연구

  • Published : 2004.12.01
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Abstract

This study investigates the fatigue lives of SM490A material(base metal) specimens and fillet weld specimens, which are made same material and weld method for the railway vehicle. These fatigue lives have a difference, the fatigue lives of weld specimen are shorter than those of base metal. We measured the strains on the weld positions of the specimens during the fatigue test for investigation of crack initiation and crack growth. In these result, we could find the information of the crack initiation position on weld bead and the history of crack growth. Also we knew that the fatigue crack initiation cycles and the changes of the strain which were affected the fractured surface roughness and morphology.

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References

  1. ASTM E466, standard test method for conducting constant amplitude axial fatigue tests of metallic materials, ASTM, 1991
  2. Julie A. B, Fundamentals of metal fatigue analysis, p.13, Printice Hall, 1990
  3. Susumu Y, Michio I, Masao K, Etsuo S, 'Effect of size annd frequency on fatigue properties of SM50B butt welded joint,' 日本容接學會誌, Vo1.47, No-9, 1978
  4. Kang. S. W, 'Study on Stress Concentration Factor at Fillet Welded Joint,' SNAK Papers, Vol.33, No.3, 1996
  5. Peterson. R. E, Stress concentration factors, John Wiley & Sons, Inc, 1974
  6. Jae-hoon K, Byeong-choon G, KSAE Fall-conference proceeding, Vol.2, pp.1618-1623, KSAE, 2003
  7. Jean M. B, Introduction to surface roughness and scattering,, pp. 38-56, Optical society of america, 1991