Fatigue crack path and propagation rate at weld root in cruciform joint
The results of experimental research of the path and propagation rate of fatigue cracks in cruciform welded joint with a lack of fusion are presented. It is shown that the cracks are initiated at and propagates from the all non-fused weld root faces. Experimental results are compared with the data of computer simulation in Ansys, and with numerical calculations of fatigue life using the received equations of stress intensity factors at the weld root.