Mechanical Evaluation for a Fatigue Fracture Surface generated in Steel T-shaped Tubular Joints with Different Weld Toe Radius

A series of fatigue tests has been carried out for steel T-shap ed tubular joint specimens with different weld toe radius by Yagi et al.. Through the tests, interesting fracture patterns were found at the chord/brace intersection. The patterns were characterized by the toe radii. In the experimental observation, the surface crack was curved along the crack width and depth. In addition, a twisted fracture surface can be found in a joint with...