Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Fatigue Life Evaluation of Welded Joints by a Strain-life Approach Using Hardness and Tensile Strength

  • Goo Byeong-Choon (Rolling Stock Division, Korea Railroad Research Institute) ;
  • Yang Seung-Yong (Rolling Stock Division, Korea Railroad Research Institute)
  • Published : 2006.01.01
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Abstract

To evaluate the fatigue lifetime of structures, it is necessary to identify the values of parameters through tests. From the viewpoint of time and cost it is difficult for engineers to get the necessary data through tests. In this study, we surveyed literature and proposed a procedure to identify the fatigue parameters expressed with the Brinell hardness and elastic modulus. After obtaining stress concentration factors by finite element analysis, we calculated fatigue notch factors using Peterson's formula. Taking into account the welding residual stress, which was also obtained by finite element analysis, we evaluated the fatigue lifetime of four kinds of welded joints using the proposed approach. The estimated results are in a good agreement with the experimental results.

Keywords

References

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