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This paper is concerned with the fatigue behaviour of welded joints by the notch stress approach. The actual welded shape is complex and 3-dimensional that may influence greatly the fatigue strength. The purpose of the paper is to pr esent a way of modelling the actual weld bead shape by using a 3-D Laser scanner for experim ental models of steel plates with longitudinal fillet welds, and applying its results to a proper notch stress method for the fatigue strength. The present approach to assess the fa tigue strength is quite promising with application to a variety of welded joints and effects of weld profiling to fatigue strength. ※Keywords: Notch fatigue analysis(), Bead shape modelling(), Fatigue strength test for longitudinal-gusset plate(   ) 1.             .         .                 : 2009 5 20, : 2009 7 26✝: pdcyang@mail.ulsan.ac.kr, ✝: 052-259-2159

Notch Fatigue Analysis Based on the Actual Bead Shape of Welded Joint