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JWJ > Volume 28(2); 2010 > Article
Journal of KWJS 2010 April;28(2) :84-90.
Published online May 13, 2010.
A Study of Predicting 3-dimensional Welding Residual Stresses Distribution for T-joint Fillet Specimen
Mi-Ji Yoo, Jang-Hyun Lee, Se-Yun Hwang, Kyung-Su Kim, Sung-Chan Kim




Correspondence:   Published online May 13, 2010
ABSTRACT
  Fillet welding accounts for about 80% of all constructing process of ship and ocean structure. T-joint is one of the typical shapes which are frequently reported to experience the fatigue damage when the marine structure meets the storm loads. The fatigue damage is affected by the magnitude of residual stresses on the weld. Recently, many shipping registers and design guidances have required that the fatigue strength assessment method should be compensated by the effect of the residual stress in case that the random loading or storm loading is applied to the marine vessels. This study suggests the computational procedure to analyze the residual stresses of T-joint specimen that is frequently reported to get damaged by the storm loading. Experiment by XRD as well as the 3-D computational welding model is presented in order to get the profile of residual stress. Throughout the comparison of experimental result with the computational result, the computational model was validated. Thereafter, characteristics of the residual stresses in the joint are discussed..
Keywords: Welding;Residual stress;Fatigue damage;FEA;XRD;T-joint;Extreme storm load
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