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For many years the fatigue behavior of welds and weldments has been studied in terms of the geometry of the members, the stresses to which they are subjected, and the materials of which they are fabricated. Numerous laboratory tests have been conducted and have served as a basis for the development of current fatigue design specifications. More recently, research on crack initiation and propagation, expanded data on loadings, and the development of new concepts of structural reliability have provided information that should help to make possible in the future greatly improved fatigue design specifications for welded structures. However, to achieve this goal, extensive further detailed research and study are necessary.
fatigue tests, welded joints, weldments, design, crack initiation, crack propagation, reliability, random loads
Professor, Civil Engineering Department, University of Illinois, Urbana-Champaign, Ill