Yun Jae Kim

TL;DR: In this article, the authors proposed a new method to simulate ductile failure using finite element analysis based on the stress-modified fracture strain model, which is used for structural integrity assessment.

TL;DR: In this article, a local failure criterion was proposed to predict ductile failure of full-scale API X65 pipes with simulated corrosion and gouge defects under internal pressure, based on detailed finite element (FE) analyses with the proposed local fracture criterion, burst pressures of defective pipes were estimated and compared with experimental data.

TL;DR: In this paper, a phenomenological model of ductile fracture for the API X65 steel using the Gurson-Tvergaard-Needleman (GTN) model is presented.

TL;DR: In this paper, the authors provided detailed plastic limit load solutions for cylinders containing part-through surface cracks under combined axial tension, internal pressure and global bending, using elastic-perfectly-plastic material behavior, together with analytical solutions based on equilibrium stress fields.

TL;DR: In this article, the authors proposed ductile failure criteria in terms of true fracture strain (the equivalent strain to fracture) as a function of the stress triaxiality (defined by the ratio of the hydrostatic stress to the equivalent stress) for the API X65 steel.