Abstract
Although it has been found that misalignment of the welded joints can reduce fatigue strength significantly, further studies are still required for comprehensive investigation, including varying geometry variables. In this study, boundary element technique and hypersingular boundary integral equation (HBIE) are employed to calculated the notch stress concentration factors and then predict the fatigue life as this method can lead to highly accurate and inexpensive results. The addressed variable is the root crack length, or partial penetration depth which can be more accurately modeled by the boundary element method. It is noted that the predicted fatigue life has a very good agreement with existing experimental results. The corresponding results, with different boundary conditions and root crack length, are presented. Finally, the effect of misalignment on the fatigue strength of load-carrying cruciform welded joints is discussed.
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