FATIGUE LIFE ESTIMATE OF C-MN STEEL WELDED CRUCIFORM JOINTS

The fatigue life of a manual metal arc welded cruciform joint failing from a root lack of the penetration region is estimated by the applica tion of crack growth relations. A two-parameter relation was used. The initiation life and propagation life of the joint were taken into acc ount to obtain the total fatigue life of the joint from the crack grow th parameters. To test the accuracy of the method, the predicted data was compared with the experimental data for a C-Mn type steel welded j oints. The results were in good agreement with the experimental data.