FATIGUE STRENGTH PREDICTION FOR MISALIGNED WELDED JOINTS BY STRESS FIELD INTENSITY METHOD

摘要

Based on the theory of stress field intensity method, a predicting model of effective stress concentration facfor for misaligned welded joints is presented. The model is taken account of the effects of material properties, type of loading, value of misalignment, stress gradient, stress ratio and residual stress on the fatigue strength respectively. The effective stress concentration factors of a few of misaligned welded joints are estimated. Examples show that good agreement is achieved between the estimations and experiments. It may be greatly decreased fatigue tests with the method. Therefore the model has significance for engineering application.