角回し溶接継手の残留応力

抄録

Fatigue damages often occur in corner boxing welded joints, because of stress concentration and residual stress. For the stress concentration, the hot spot stress approach can be applicable. However, for the weld residual stress in the joint, suitable estimate method is limited.
The purpose of this paper is to clear the residual stresses in the corner boxing joints. The estimate method on the residual stresses, based on the inherent stress technique, is presented. The residual stress measurements are performed on two types of longitudinal fillet welded joints. The results are compared with the calculated ones, and correctness of the estimate method is confirmed. Using the method, parametric studies on the residual stresses are carried out, and the effects of the section dimensions of face plate, heat input, yield strength, and welding length are shown.