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JWJ > Volume 31(2); 2013 > Article
Journal of KWJS 2013 April;31(2) :43-48.
Published online June 5, 2013.
doi:https://doi.org/10.5781/KWJS.2013.31.2.43
Fatigue Life Evaluation on Compressive & Tensional Residual Stress Induced Materials and Residual Stress Measurement using Hole Drilling Method
Seung Yeb Baek
Dept. of Mechanical Engineering, Yeungjin College, Daegu 702-721, Korea
Correspondence: Seung Yeb Baek  Email: sandos@hanmail.net
  Published online June 5, 2013
ABSTRACT
This paper Investigated the characteristics of residual stress in weld is composed of typical specimens, are investigated by using three dimensional thermal elasto-plastic FEM analysis. Numerically calculated residual stresses in the gas welds were then compared with experimental results obtained by the hole-drilling method. Using the stress amplitude (σa)R at the hot spot point of gas weld, the relations obtained as the fatigue test results for typical specimens having various dimensions and shapes were systematically rearranged to obtain the (σa)R-Nf relationship. It was found that more systematic and accurate evaluation of the fatigue strength of plug- and ring-type gas-welded joints can be achieved by using (σa)R.v
Keywords: Residual stress | Fatigue design criterion | Thermal stress | Hole drilling method
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