Fatigue strength of laser beam welded thin steel structures under multiaxial loading |
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| Affiliation: | 1. Dalhousie University, Department of Mechanical Engineering, Halifax, Nova Scotia B3H 4R2, Canada;2. Advanced Engineering, GKN Sinter Metals LLC, Auburn Hills, MI 48326, USA;3. VLN Advanced Technologies Inc., 1166 Rainbow Street, Ottawa, Ontario K1J 6X7, Canada |
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| Abstract: | The multiaxial fatigue behaviour of thin laser beam welded tube–tube specimens of the structural steel St35 was assessed according to the methodology of the fictitious weld root radius of rf=0.05 mm and the application of the Effective Equivalent Stress Hypothesis (EESH), especially considering the fatigue life reducing influence of out-of-phase loading in comparison to in-phase loading. The results are applicable for the fatigue design of laser beam welded car body and chassis structures of thin steel sheets (t<3 mm). |
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