EXPERIMENTAL STUDY ON DUCTILE FRACTURE MECHANISM OF WELDED STEEL T-TYPE JOINTS UNDER CYCLIC LOADING

Abstract

 This study is aimed to investigate cracking mechanism of welded steel T-type joints. Crack initiation, propagation and rupture of the joints were studied using cyclic bending loading. Effect of post-weld treatment, notch and notch position on cyclic performance of the joints was studied. As a result, post-weld treatment can delay crack initiation and notched joints are apt to crack earlier than those notchless ones. Notch close to the boundary between the fusion zone and heat affected zone can accelerate the crack propagatipon.