A study on developing ductile fracuture simulation method for welded steel T-type joints subjected to cyclic loading

Abstract

In this study, ductile fracture simulations from ductile crack initiation to rupture were performed on welded steel T-type joints. To this end, the three-stage two parameter ductile fracture model proposed in the past study was modified. Instead of the plastic displacement at element failure, a parameter was newly introduced to evaluate the ductile crack propagation of test specimens. As a result, the present analysis was able to accurately simulate the ductile crack initiation and propagation as well as the load-displacement relationship of the experimental result. It is concluded that the modified ductile fracture model can well predict the fracture behavior of welded steel T-type joints subjected to cyclic bending loading.